Magnetic suspension thermobalance based on quick photothermal heating and measurement method thereof

Abstract

A magnetic suspension thermobalance based on quick photothermal heating comprises a sealed container, a reaction tank, a magnetic suspension device, a laser displacement monitoring component, a photothermal heating component and a photothermal heating component displacement device. A method comprises following steps: weighing a testing sample and adding same into the reaction tank; putting the reaction tank into the sealed container together with a magnetic suspension float; causing the magnetic suspension float to float in the sealed container; introducing gas into the sealed container; measuring the real-time position of the magnetic suspension float, and causing same to a measurement zero point; heating the reaction tank; maintaining a heating beam on the reaction tank; measuring the temperature of the testing sample in the reaction tank; and recording the displacement of the magnetic suspension float, and converting said displacement into mass.

Claims

1. A magnetic suspension thermobalance based on photothermal heating, the magnetic suspension thermobalance comprising: a sealed container, a reaction tank, a magnetic suspension device, a laser displacement monitoring component, a photothermal heating component and a photothermal heating component displacement device, wherein a gas inlet is disposed on an upper end of the sealed container, a removable cover plate is disposed on a lower end of the sealed container, a gas outlet is disposed on the cover plate, an air flow stabilization device and an infrared temperature measurement component are disposed inside the sealed container, a displacement monitoring window and a heating beam window both made of a transparent material are disposed in a side wall of the sealed container, the air flow stabilization device is fixed below the gas inlet, the infrared temperature measurement component is fixed below the air flow stabilization device, the photothermal heating component and the laser displacement monitoring component are disposed around the sealed container, the photothermal heating component is connected to the photothermal heating component displacement device and is displaceable through the photothermal heating component displacement device, the magnetic suspension device comprises a magnetic suspension float and a magnetic suspension stator, a support stand configured to support the reaction tank is fixedly disposed on an upper portion of the magnetic suspension float, and when measurement is performed, the magnetic suspension stator is located below the cover plate, the reaction tank is placed on the support stand and is placed in the sealed container together with the magnetic suspension float, and the reaction tank, the magnetic suspension float, and the magnetic suspension stator are on a same center axis, the infrared temperature measurement component faces an opening on an upper portion of the reaction tank, a heating beam emitted by the photothermal heating component passes through the heating beam window and focuses on the reaction tank, a monitoring laser beam emitted by the laser displacement monitoring component passes through the displacement monitoring window and irradiates a measurement position of the magnetic suspension float.

2. The magnetic suspension thermobalance based on photothermal heating as claimed in claim 1, wherein the magnetic suspension thermobalance further comprises a stator lifting and lowering component configured to lift or lower the magnetic suspension stator, and an upper portion of the stator lifting and lowering component is fixedly connected to a lower portion of the magnetic suspension stator.

3. The magnetic suspension thermobalance based on photothermal heating as claimed in claim 2, wherein the stator lifting and lowering component comprises an electric machine and a screw pair, one end of the screw pair performing a rotation motion is fixedly connected to an output axis of the electric machine, and another end of the screw pair performing a linear motion is fixedly connected to the lower end of the magnetic suspension stator.

4. The magnetic suspension thermobalance based on photothermal heating as claimed in claim 1, wherein a balancer is disposed outside the magnetic suspension float, an upper portion of the balancer is fixedly connected to the support stand, the upper portion of the magnetic suspension float is embedded inside the balancer from bottom to top, and at least two balancing wings are symmetrically disposed on a center of the balancer.

5. The magnetic suspension thermobalance based on photothermal heating as claimed in claim 4, wherein a black silicon carbide ceramic cylindrical crucible is adopted for the reaction tank, and a lightweight insulating brick material is adopted to make the support stand and the balancer.

6. The magnetic suspension thermobalance based on photothermal heating according to claim 1, wherein a number of the photothermal heating component is plural, the photothermal heating components surround the center axis of the reaction tank and are disposed in an array outside the sealed container, and a size and a number of the heating beam window are determined to ensure that each of the photothermal heating components normally irradiates the reaction tank in a measurement process.

7. The magnetic suspension thermobalance based on photothermal heating according to claim 1, wherein a number of the laser displacement monitoring component is plural, the laser displacement monitoring components are disposed around the center axis of the reaction tank in an array outside the sealed container, and a size and a number of the displacement monitoring window are determined to ensure that each of the laser displacement monitoring components normally irradiates the measurement position of the magnetic suspension float in a measurement process.

8. The magnetic suspension thermobalance based on photothermal heating according to claim 1, wherein the sealed container is cylindrical-shaped, and the reaction tank, the magnetic suspension float, and the magnetic suspension stator are all located on a center axis of the sealed container when measurement is performed.

9. The magnetic suspension thermobalance based on photothermal heating according to claim 1, wherein a precision robotic arm is adopted for the photothermal heating component displacement device.

10. The magnetic suspension thermobalance based on photothermal heating according to claim 1, wherein one or more of a pressure monitoring component, a microscope, and a Raman laser are further disposed in the sealed container.

11. A measurement method of a magnetic suspension b thermobalance based on photothermal heating, wherein the method adopts the magnetic suspension thermobalance as claimed in claim 1 to measure a mass change of a testing sample under a temperature control condition and the method comprises following steps: 1) weighing the testing sample having a mass of g.sub.0 and adding the same into the reaction tank; 2) removing the cover plate, placing the reaction tank on the support stand of the magnetic suspension float, placing the magnetic suspension float on a center of the cover plate, installing the cover plate onto the sealed container, adjusting a position of the magnetic suspension stator to be located directly below the center of the installed cover plate; 3) activating the magnetic suspension device, moving the magnetic suspension stator upwards after a magnetic field stabilizes, so that the magnetic suspension float floats in the sealed container; 4) continuously introducing gas required to maintain a reaction atmosphere into the sealed container, the gas entering from the gas inlet and exiting from the gas outlet, a velocity of flow of the gas being controlled to be a velocity of flow v required by an experiment; 5) activating the laser displacement monitoring component, the monitoring laser beam emitted by the laser displacement monitoring component passing through the displacement monitoring window and irradiating the measurement position of the magnetic suspension float, measuring a real-time position of the magnetic suspension float in the sealed container, adjusting the position of the magnetic suspension stator up and down, causing the magnetic suspension float to float to a measurement zero point position of the laser displacement monitoring component; 6) activating the photothermal heating component, the heating beam emitted by a heating light source of the photothermal heating component passing through the heating beam window, focusing on the reaction tank, and heating the reaction tank; 7) causing the magnetic suspension float to displace by the mass change of the testing sample in a temperature control process, measuring displacement by the laser displacement monitoring component in real time, adjusting a position of the photothermal heating component in real time by the photothermal heating component displacement device according to the displacement, keeping the heating beam on the reaction tank all the time; 8) measuring a real-time temperature of the testing sample in the reaction tank through the infrared temperature measurement component, adjusting heating power of a heating light source according to the measured real-time temperature, implementing precise temperature control of the testing sample; and 9) recording displacement of the magnetic suspension float relative to the measurement zero point in the temperature control process, obtaining corresponding mass according to the converted displacement.

12. The measurement method of the magnetic suspension b thermobalance based on photothermal heating as claimed in claim 11, wherein in step 9), the displacement measured in the experiment is converted into mass through a comparative experiment, and the comparative experiment comprises following steps: 9.1) evenly selecting a plurality of mass values close to the mass of g.sub.0, wherein a maximum mass value is greater than or equal to a maximum value of the mass of the testing sample in the temperature control process, and a minimum mass value is less than or equal to a minimum value of the mass of the testing sample in the temperature control process; 9.2) weighing and adding a comparative sample having mass of g.sub.t into the reaction tank to perform the comparative experiment for each of mass values g.sub.t, keeping various parameters of the magnetic suspension device to be identical to that in an experiment performed for the testing sample, adjusting the velocity of flow v of the gas and the position of the magnetic suspension stator to be identical to that in the experiment performed for the testing sample, not activating the photothermal heating component, recording displacement x.sub.t corresponding to the mass g.sub.t; 9.3) experimenting on each of the obtained mass values according to the foregoing steps, obtaining a data table of displacement x.sub.t and mass g.sub.t, drawing a x.sub.t-g.sub.t curve; and 9.4) identifying a point of the displacement obtained through measurement on the x.sub.t-g.sub.t curve when the testing sample is experimented, and that the corresponding mass is obtained.

13. The measurement method of the magnetic suspension b thermobalance based on photothermal heating as claimed in claim 12, wherein the step 9.4) comprises performing curve fitting to the x.sub.t-g.sub.t curve, obtaining an equation of g.sub.t and x.sub.t, and substituting the displacement obtained through measurement into the equation when the testing sample is tested, and that the corresponding mass is obtained.

14. The measurement method of the magnetic suspension b thermobalance based on photothermal heating as claimed in claim 12, wherein the method further comprises obtaining a plurality of groups of g.sub.0 and v for the comparative experiment according to a numerical range required by the experiment; first adjusting the position of magnetic suspension stator and causing the magnetic suspension float to float to the set measurement zero point position for each group of g.sub.0 and v, keeping the magnetic suspension stator to be unchanged next, obtaining comparative data of x.sub.t and g.sub.t under a condition of g.sub.0 and v according to the steps 9.1) to 9.3); repeatedly performing the comparative experiment, building a data base including four quantities of g.sub.0, v, x.sub.t, and g.sub.t; and selecting one group of g.sub.0 and v according to needs when the testing sample is experimented, identifying the comparative data of the corresponding x.sub.t and g.sub.t in the data base, so that displacement is conveniently converted into mass.

15. The measurement method of the magnetic suspension b thermobalance based on photothermal heating according to claim 11, wherein the method further comprises following step: 10) recording the real-time temperature of the testing sample in the temperature control process, and corresponding the real-time temperature of the testing sample with the mass calculated and obtained in real time in step 9), drawing a curve of the mass of the testing sample and a temperature to perform a thermal gravimetric analysis.

16. The measurement method of the magnetic suspension thermobalance based on photothermal heating as claimed in claim 15, wherein the method further comprises following step: 11) moving the magnetic suspension stator downwards and causing the magnetic suspension float to slowly descend onto the cover plate after the reaction tank is cooled down after the measurement is completed, turning off a system power source, opening the cover plate, and removing the reaction tank.

17. The measurement method of the magnetic suspension thermobalance based on photothermal heating according to claim 11, wherein the method further comprises following step: 11) moving the magnetic suspension stator downwards and causing the magnetic suspension float to slowly descend onto the cover plate after the reaction tank is cooled down after the measurement is completed, turning off a system power source, opening the cover plate, and removing out the reaction tank.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic cross-sectional view of a structure of a magnetic suspension thermobalance based on quick photothermal heating designed by an embodiment 1.

(2) FIG. 2 is a schematic top view of a structure of a balancer in FIG. 1.

(3) FIG. 3 is a schematic exploded view of a structure of a magnetic suspension float in FIG. 1.

(4) FIG. 4 is a schematic top view of a structure of an air flow stabilization device in FIG. 1.

(5) FIG. 5 is a schematic cross-sectional view of a structure of a magnetic suspension thermobalance based on quick photothermal heating designed by an embodiment 2.

(6) FIG. 6 is a schematic diagram of a positional relationship between a photothermal heating component and a magnetic suspension float in the magnetic suspension thermobalance in FIG. 5.

(7) FIG. 7 is a curve diagram drawn and obtained according to data in Table 1.

(8) FIG. 8 is a curve diagram drawn and obtained according to data in Table 2 and Table 3.

DESCRIPTION OF THE EMBODIMENTS

(9) The disclosure is further described in detail in combination with accompanying drawings and specific embodiments.

Embodiment 1

(10) As shown in FIG. 1 to FIG. 4, a magnetic suspension thermobalance based on quick photothermal heating designed by this embodiment includes a sealed container 1, a reaction tank 601, a magnetic suspension device 6, a stator lifting and lowering component 8, a laser displacement monitoring component 10, a photothermal heating component 9 and a photothermal heating component displacement device 903.

(11) The sealed container 1 is cylindrical-shaped, a gas inlet 2 is disposed on a center of an upper end of the sealed container 1, and a removable cover plate 12 (secured through a bolt) is disposed on a lower end of the sealed container 1. Two gas outlets 11 are symmetrically disposed on the cover plate 12. In the sealed container 1, a pressure monitoring component 4, an air flow stabilization device 3, and an infrared temperature measurement component 5 are disposed inside, and a displacement monitoring window 102 made of a transparent material and a heating beam window 101 made of a transparent material are disposed in a side wall. The air flow stabilization device 3 is fixed below the gas inlet 2 and is a honeycomb briquet-shaped porous structure. The infrared temperature measurement component 5 is fixed at a lower center position of the air flow stabilization device 3, and a measurement direction is directly below. A precision robotic arm is adopted for the photothermal heating component displacement device 903 and may be controlled in real time through a computer. The photothermal heating component 9 is disposed on and may be displaced along with the photothermal heating component displacement device 903.

(12) The magnetic suspension device 6 includes a magnetic suspension float 603 and a magnetic suspension stator 7, and a support stand 602 configured to support the reaction tank 601 is fixedly disposed on an upper portion of the magnetic suspension float 603. The stator lifting and lowering component 8 includes an electric machine 802 and a screw pair 801. One end of the screw pair 801 performing a rotation motion is fixedly connected to an output axis of the electric machine 802, and another end of the screw pair 801 performing a linear motion is fixedly connected to the lower end of the magnetic suspension stator 7. A balancer 604 is disposed outside the magnetic suspension float 603, and at least four balancing wings 605 are disposed outside the balancer 604 in a circumferential direction in an array. An upper portion of the balancer 604 is fixedly connected to the support stand 602, and the upper portion of the magnetic suspension float 603 is embedded inside the balancer 604 from bottom to top.

(13) The magnetic suspension stator 7 is located below the cover plate 12, and the reaction tank 601 is placed on the support stand 602 and is placed inside the sealed container 1 together with the magnetic suspension float 603. The reaction tank 601, the magnetic suspension float 603, and the magnetic suspension stator 7 are all located on the center axis (a vertical direction) of the sealed container 1 when measurement is performed. The air flow stabilization device 3 fitted and disposed below may be used to ensure that air flow is evenly and stably provided. The pressure monitoring component 4 is disposed a top portion of the container body, and a temperature monitoring component is fixedly connected and disposed below a middle portion of the air flow stabilization device 3 and directly faces the reaction tank 601.

(14) The photothermal heating component 9 includes a heating light source 901 and an optical component 902 configured to focus the heating light source 901. A number of the photothermal heating component 9 and a number of the heating beam window 101 are respectively 2, and the photothermal heating components 9 and the heating beam windows 101 surround the center axis of the reaction tank 601 and are disposed at two sides of the sealed container 1. A size and a position of each of the heating beam windows 101 are determined to ensure that each of the photothermal heating components 9 may normally irradiate the reaction tank 601 in a measurement process.

(15) A number of the laser displacement monitoring component 10, and a number of the displacement monitoring window 102 are respectively 2, and the laser displacement monitoring components 10 and the displacement monitoring windows 102 are symmetrically disposed at two sides of the sealed container 1. The laser displacement monitoring components 10 and the displacement monitoring windows 102 are located below the photothermal heating components 9. A size and a number of each of the displacement monitoring windows 102 are determined to ensure that each of the laser displacement monitoring components 10 normally irradiates a measurement position of the magnetic suspension float 603 in a measurement process. A bottom surface of the magnetic suspension float 603 is selected as the measurement position in this embodiment.

(16) Fiber reinforced plastics is adopted to make the sealed container 1 and the cover plate 12. High-transmittance quartz glass is adopted to make both the displacement monitoring windows 102 and the heating beam windows 101. A black silicon carbide ceramic cylindrical crucible is adopted for the reaction tank 601. A lightweight insulating brick material is adopted to make the support stand 602 and the balancer 604. Surfaces of the support stand 602, the balancer 604, and the magnetic suspension float 603 are sprayed with a high temperature and corrosion resistant coating. A samarium cobalt magnet is adopted to make the magnetic suspension float 603. A highly efficient photothermal heating light source 901 having a light concentration cup is adopted for the heating light source 901. The optical component 902 is a lens group having an infrared anti-reflection coating.

(17) In this embodiment, the Fluke 572-2 is adopted for the infrared temperature measurement component 5, the Panasonic HG-C1100 is adopted for the laser displacement monitoring component 10, and the Osram HLX64635 is adopted for the heating light source 901.

Embodiment 2

(18) As shown in FIG. 5, the structures of embodiment 2 and the embodiment 1 are substantially identical, and differences therebetween merely include the following. 1) A microscope 13 and Raman laser 14 are disposed at a lower center portion of the air flow stabilization device 3 in embodiment 2. 2) The specific stator lifting and lowering component 8 is not provided in embodiment 2, and a position of a stator is manually adjusted through a clamping tool. 3) The numbers of the photothermal heating components 9, the heating beam windows 101, the laser displacement monitoring components 10, and the displacement monitoring windows 102 all are 4, and the photothermal heating components 9, the heating beam windows 101, the laser displacement monitoring components 10, and the displacement monitoring windows 102 respectively surround around the magnetic suspension float 603 in an array. FIG. 6 shows the positional relationship between the photothermal heating components 9 and the magnetic suspension float 603 in a top view. 4) In this embodiment, the SMART SENSOR AT1350 is adopted for the infrared temperature measurement component 5, the SICK OD VALUE is adopted for the laser displacement monitoring component 10, and the USHIO JCR 15V150W is adopted for the heating light source 901.

Embodiment 3

(19) The present embodiment discloses a method of measurement of a mass change of a testing sample under a temperature control condition implemented through the magnetic suspension thermobalance provided in embodiment 1 or in embodiment 2 (the two structures may be optionally selected), and the steps are provided as follows.

(20) 1) A testing sample having a mass of g.sub.0 is weighed and added into the reaction tank 601.

(21) 2) The cover plate 12 is removed, and the reaction tank 601 is placed on the support stand 602 of the magnetic suspension float 603. The magnetic suspension float 603 is placed on a center of the cover plate 12, and the cover plate 12 is installed onto the sealed container 1. A position of the magnetic suspension stator 7 is adjusted to be located directly below the center of the cover plate 12 after the cover plate 12 is installed.

(22) 3) The magnetic suspension device 6 is activated, and the magnetic suspension stator 7 is moved upwards after a magnetic field stabilizes, so that the magnetic suspension float 603 floats in the sealed container 1.

(23) 4) Gas required to maintain a reaction atmosphere is continuously introduced into the sealed container 1. The gas enters from the gas inlet 2 and exits from the gas outlets 11, and a velocity of flow of the gas is controlled to be a velocity of flow v required by an experiment.

(24) 5) The laser displacement monitoring component 10 is activated. The monitoring laser beam emitted by the laser displacement monitoring component 10 passes through the displacement monitoring window 102 and irradiates the measurement position of the magnetic suspension float 603. A real-time position of the magnetic suspension float 603 in the sealed container 1 is measured in real time. The position of the magnetic suspension stator 7 is adjusted up and down to cause the magnetic suspension float 603 to float to a measurement zero point position of the laser displacement monitoring component 10.

(25) 6) The photothermal heating component 9 is activated. The heating beam emitted by the heating light source 901 of the photothermal heating component 9 passes through the heating beam window 101, focuses on the reaction tank 601, and heats the reaction tank 601.

(26) 7) The mass change of the testing sample causes the magnetic suspension float 603 to displace in a temperature control process. Displacement is measured by the laser displacement monitoring component 10 in real time. A position of the photothermal heating component 9 is adjusted in real time by the photothermal heating component displacement device 903 according to the displacement, and the heating beam is kept on the reaction tank 601 all the time.

(27) 8) A real-time temperature of the testing sample in the reaction tank 601 is measured through the infrared temperature measurement component 5. Heating power of the heating light source 901 is adjusted according to the measured real-time temperature, and precise temperature control of the testing sample is implemented.

(28) 9) Displacement of the magnetic suspension float 603 relative to the measurement zero point is recorded in the temperature control process, and corresponding mass is obtained according to the converted displacement. The displacement is converted into mass through a comparative experiment in this embodiment, and the steps are briefly described as follows.

(29) 9.1) A plurality of mass values close to the initial mass of g.sub.0 are evenly selected. Herein, a maximum mass value is greater than or equal to a maximum value of the mass of the testing sample in the temperature control process, and a minimum mass value is less than or equal to a minimum value of the mass of the testing sample in the temperature control process.

(30) 9.2) A comparative sample having mass of g.sub.t is weighed and added into the reaction tank 601 to perform the comparative experiment for each of mass values g.sub.t. Various parameters of the magnetic suspension device 6 are kept to be identical to that in an experiment performed for the testing sample. The velocity of flow v of the gas and the position of the magnetic suspension stator 7 are adjusted to be identical to that in the experiment performed for the testing sample. The photothermal heating component 9 is not activated, and the displacement x.sub.t corresponding to the mass g.sub.t is recorded.

(31) 9.3) Each of the obtained mass values is experimented according to the foregoing steps, a data table of displacement x.sub.t and the mass g.sub.t is obtained, and a xt-g.sub.t curve is drawn. Curve fitting is performed, and an equation of g.sub.t and x.sub.t is obtained.

(32) 9.4) A point of the displacement obtained through measurement is identified on the x.sub.t-g.sub.t curve when the testing sample is experimented, or calculation may be performed according to the equation obtained through curve fitting, and that the corresponding mass is obtained.

(33) The comparative experiment is briefly described above, and the specific operation may be found with reference to step 1) to step 5).

(34) 10) The real-time temperature of the testing sample in the temperature control process is recorded and corresponded with the mass calculated and obtained in real time in step 9). A curve of the mass of the testing sample and a temperature is drawn to perform a thermal gravimetric analysis.

(35) 11) The magnetic suspension stator 7 is moved downwards to cause the magnetic suspension float 603 to slowly descend onto the cover plate 12 after the reaction tank 601 is cooled down after the measurement is completed. A system power source is turned off, the cover plate 12 is opened, and the reaction tank 601 is removed.

Embodiment 4

(36) The present embodiment discloses a method of adopting a plurality of groups of comparative experiments to build a data base, and specific steps are provided as follows.

(37) 1) A range of mass of the thermobalance is determined according to experimental needs. Within this range, the initial mass g.sub.0 is selected equidistantly, and values ranging from a minimum value to a maximum value sequentially are g.sub.01, . . . , g.sub.0i, . . . , and g.sub.0m, where i is an integer and 1<i<m.

(38) 2) A range of velocity of flow of gas is determined according to experimental needs. Within this range, the calibrated velocity of flow v is selected equidistantly, and values ranging from a minimum value to a maximum value sequentially are v.sub.1, v.sub.j, . . . , and v.sub.n, where j is an integer and 1<j<n.

(39) 3) One group of v.sub.j and g.sub.0i is selected, and a testing sample having a mass of g.sub.0i is weighed by another analytical balance and is added into the reaction tank. The reaction tank is then placed inside the thermobalance. The position of the magnetic suspension stator is adjusted to cause the magnetic suspension float to float. The velocity of flow of gas is adjusted to v.sub.j. The position of the magnetic suspension stator is adjusted again to cause the magnetic suspension float to be located on the measurement zero point position. Gas supply is stopped, and the reaction tank is removed.

(40) 4) Calibrated mass dg is equidistantly increased or decreased (the lower the selected value, the greater the precision), so that the mass g.sub.ik=g.sub.0i+k.Math.dg of the testing sample, and k is an integer other than zero. If a positive integer is selected, it means that the calibrated mass increases, and if a negative integer is selected, it means that the calibrated mass decreases. The testing sample having the mass of g.sub.ik is weighed by the analytical balance and added into the reaction tank, and the reaction tank is then placed inside the thermobalance. The position of the magnetic suspension stator is adjusted to the same position as in step 3), and the velocity of flow of gas is adjusted to the same velocity of flow v.sub.j in step 3). The displacement at this moment is recorded to be x.sub.ik after stabilization is reached. Gas supply is stopped, and the reaction tank is removed. Different i values are selected, and that a corresponding data base of g.sub.t and x.sub.t when g.sub.0=g.sub.0i may be obtained.

(41) 5) All points in a set of {g.sub.01, . . . , g.sub.0i, . . . , g.sub.0m} are selected for g.sub.0i, and steps 3) and 4) are repeated.

(42) 6) All points in a set of {v.sub.1, . . . , v.sub.j, . . . . , v.sub.n} are selected for V.sub.j, steps 3) to 5) are repeated, and that a data base formed by the v, g.sub.0, x.sub.t, and g.sub.t is obtained.

(43) The following table is a data base table when the velocity of flow of gas is 0.01 m/min and the initial mass is 3.6 mg in the data base:

(44) TABLE-US-00001 TABLE 1 x.sub.t and g.sub.t Data Base Table displacement (m) mass test test test test average (mg) point 1 point 2 point 3 point 4 position 3.28 15.5 15.6 15.6 15.6 15.575 3.3 15.4 15.3 15.5 15.4 15.4 3.32 15.2 15.1 15.4 15.3 15.25 3.34 15 15 15.2 15.1 15.075 3.36 14.6 15 14.9 14.9 14.85 3.38 14.7 14.9 14.5 14.7 14.7 3.4 14.7 14.5 14.5 14.4 14.525 3.42 14.3 14.3 14.4 14.3 14.325 3.44 14.2 14.2 14.2 14 14.15 3.46 13.9 13.9 13.9 13.9 13.9 3.48 13.7 13.8 13.7 13.7 13.725 3.5 13.5 13.5 13.5 13.5 13.5 3.52 13.4 13.3 13.2 13.2 13.275 3.54 13 12.9 13.2 13.1 13.05 3.56 12.7 12.8 12.8 12.9 12.8 3.58 12.5 12.6 12.5 12.6 12.55 3.6 12.3 12.2 12.3 12.1 12.225 3.62 11.9 11.9 11.9 11.9 11.9

(45) Owing to space limitation, pieces of data related to other velocities of flow of gas and initial mass in the data base are not listed one by one, and only data required by embodiment 5 is listed in Table 1.

Embodiment 5

(46) The data base established in embodiment 4 is adopted by this embodiment, and the specific displacement measured through the experiment is converted into mass.

(47) v=0.01 m/min and g.sub.0=3.6 mg are selected. A comparative data table of the corresponding x.sub.t and g.sub.t is identified in the data base (see Table 1). In the table, the average position x.sub.t acts as the vertical coordinate, and the mass g.sub.t acts as the horizontal coordinate, and that a curve is drawn. With reference to 7 for detail, x.sub.t=9.7555g.sub.t.sup.2+56.809g.sub.t65.838 is obtained through curve fitting, and a variance R.sup.2=0.9992.

(48) A process of heating spectra graphite to 1,000 C. in an air atmosphere according to the steps of embodiment 3 is measured, and displacements of different times are obtained. Corresponding mass is obtained through conversion according to a curve fitting equation and is listed in the table below.

(49) TABLE-US-00002 TABLE 2 Data of Positions of Spectra Graphite Along With Heating Time time (s) position (m) mass (mg) 0 12.3 3.60 5 12.3 3.59 10 12.3 3.60 15 12.3 3.60 20 12.2 3.60 25 12.3 3.60 30 12.3 3.59 35 12.6 3.57 40 12.8 3.56 45 13.0 3.54 50 13.2 3.53 55 13.3 3.51 60 13.6 3.49 65 13.8 3.47 70 14.0 3.46 75 14.2 3.44 80 14.3 3.43 85 14.5 3.41 90 14.6 3.39 95 14.8 3.38 100 14.9 3.36 105 15.0 3.35 110 15.2 3.33 115 15.4 3.30 120 15.4 3.30 125 15.6 3.28

(50) Results of measurement showing the relationship between a mass change and time in the heating process of graphite through a conventional thermobalance when conditions of the velocity of flow, initial mass, and heating curve are the same are listed in Table 3 below.

(51) TABLE-US-00003 TABLE 3 Conventional Thermobalance Experimental Data of Graphite Weightlessness time (s) mass (mg) 0(30) 3.6 15(45) 3.5489 30(60) 3.492 45(75) 3.4529 60(90) 3.3971 75(105) 3.3569

(52) Table 2 and Table 3 may be drawn into the same coordinate map, and FIG. 8 is thereby obtained. Herein, the solid line is the data curve fitting curve in Table 2, and the dots are the data in Table 3. As shown in FIG. 8, the test results provided by the disclosure are preferably matched with the conventional analysis method.

(53) Note that the thermal gravimetric analysis may be favorably implemented through the disclosure, but the thermal gravimetric analysis shall not be viewed as a limitation to the purpose of the disclosure. Measurement of other scenarios, such as in situ reaction monitoring, of mass changes of a testing sample in a temperature control process (temperature increasing or temperature decreasing) may also be implemented through the disclosure.