A glass article manufacturing system (10) includes a crucible (38) that defines a barrel (46) and a nozzle (54). The barrel (46) accepts a glass feedstock (62). A heater 66 is in thermal communication with the nozzle (54). The heater 66 heats the feedstock (62) within the nozzle (54). An actuator (22) is positioned proximate the barrel (46) and extrudes the feedstock (62) through the nozzle (54) as extruded feedstock.

A glass article manufacturing system (10) includes a crucible (38) that defines a barrel (46) and a nozzle (54). The barrel (46) accepts a glass feedstock (62). A heater 66 is in thermal communication with the nozzle (54). The heater 66 heats the feedstock (62) within the nozzle (54). An actuator (22) is positioned proximate the barrel (46) and extrudes the feedstock (62) through the nozzle (54) as extruded feedstock.

A glass product stress evaluation system is provided. The glass product stress evaluation system includes a background light source to selectively transmit light of different wavelengths and illuminates a glass product. An imaging device is mounted in proximity to the glass product and develops digitally encoded representations of internal annealing stresses formed within the glass product. The imaging device converts the digitally encoded internal stress representations into digital signals. A plurality of optical devices provides a converging view of the glass product. A plurality of filters is mounted in proximity to the plurality of optical devices and selectively transmits light of different wavelengths to the optical devices, thereby transforming detected imaged stresses in the glass product into visible colors. A processing unit receives the digital images from the imaging device and converts the digital images into visible images. The digital images can be classified into annealing grades.

The present invention provides for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.

The present invention provides for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.

The present disclosure relates to glass manufacturing, a glass composition, glass with a low inclusion content and a preparation method therefor and use thereof. The composition comprises 50-64 wt. % SiO.sub.2, 14-24 wt. % Al.sub.2O.sub.3, 0-7 wt. % B.sub.2O.sub.3+P.sub.2O.sub.5, 0.5-7 wt. % MgO, 1-10 wt. % CaO, 0-9 wt. % SrO, 0.1-14 wt. % BaO, 0.1-5 wt. % ZnO, 0.1-4 wt. % TiO.sub.2, 0.1-7 wt. % Y.sub.2O.sub.3+La.sub.2O.sub.3+Nd.sub.2O.sub.3, and <0.05 wt. % R.sub.2O, wherein R.sub.2O is a sum of the content of Li.sub.2O, Na.sub.2O and K.sub.2O, and the composition satisfies the following conditions: (1) a temperature T.sub.100 corresponding to a viscosity of 100 P is 1730 C. or higher; (2) a surface tension at 1300 C. is less than 420 mN/m. The glass prepared by the glass composition and the glass with a low inclusion content preparation method has the advantages of having low inclusion content, having a simple preparation process, being low in cost and so on.

The present disclosure relates to glass manufacturing, a glass composition, glass with a low inclusion content and a preparation method therefor and use thereof. The composition comprises 50-64 wt. % SiO.sub.2, 14-24 wt. % Al.sub.2O.sub.3, 0-7 wt. % B.sub.2O.sub.3+P.sub.2O.sub.5, 0.5-7 wt. % MgO, 1-10 wt. % CaO, 0-9 wt. % SrO, 0.1-14 wt. % BaO, 0.1-5 wt. % ZnO, 0.1-4 wt. % TiO.sub.2, 0.1-7 wt. % Y.sub.2O.sub.3+La.sub.2O.sub.3+Nd.sub.2O.sub.3, and <0.05 wt. % R.sub.2O, wherein R.sub.2O is a sum of the content of Li.sub.2O, Na.sub.2O and K.sub.2O, and the composition satisfies the following conditions: (1) a temperature T.sub.100 corresponding to a viscosity of 100 P is 1730 C. or higher; (2) a surface tension at 1300 C. is less than 420 mN/m. The glass prepared by the glass composition and the glass with a low inclusion content preparation method has the advantages of having low inclusion content, having a simple preparation process, being low in cost and so on.

An article includes a substrate with two main faces defining two main surfaces separated by edges, the substrate carrying a functional coating deposited over at least a portion of a main surface and a temporary protective layer deposited over at least a portion of the coating. The temporary protective layer has a thickness of at least 1 micrometer. The temporary protective layer made of polyfuran resin is obtained from a liquid composition comprising furfuryl alcohol.

An article includes a substrate with two main faces defining two main surfaces separated by edges, the substrate carrying a functional coating deposited over at least a portion of a main surface and a temporary protective layer deposited over at least a portion of the coating. The temporary protective layer has a thickness of at least 1 micrometer. The temporary protective layer made of polyfuran resin is obtained from a liquid composition comprising furfuryl alcohol.

Systems and methods for drawing high aspect ratio metallic glass-based materials are provided. Methods of drawing a high aspect ratio metallic glass-based material are premised on stably drawing high aspect ratio metallic glass-based material from a preform metallic glass-based composition, accounting for the relationships between: the desired formation of an amorphous structure that is substantially homogenous along the majority of the length of the drawn high aspect ratio material; the desired final geometry of the drawn high aspect ratio material; the nature of the force that is used to draw the molten metallic glass-based composition; the velocity at which the high aspect ratio material is drawn; the viscosity profile of the material along its length as it is being drawn; and/or the effect of temperature on the metallic glass-based material. A precise thermal treatment is imposed along the forming length of the drawn material so as to enable a steady state drawing process, the precise thermal treatment being based on: the desire to develop a substantially same amorphous structure along the length of the drawn material; the desired final geometry for the drawn material; the nature of the force used to draw the material; the velocity at which the material is being drawn; and/or the thermal treatment's impact on the viscosity profile of the material along its length as it is being drawn.