The present application provides a fixing apparatus for a furnace wire of a furnace body heater, which is formed by assembling a plurality of fixing units. A structure of each of the fixing units includes: a front end structure and a tail end structure connected together. The front end structure is provided with a first recess and a second recess. The tail end structure is provided with a third recess and a fourth protrusion block. Two adjacent ones of the fixing units form a first splice structure, in the first splice structure, the fourth protrusion block of the fixing unit at the top is snap fitted in the third recess of the fixing unit at the bottom to achieve fixation. An opening of a first recess of the fixing unit at the bottom and an opening of a second recess of the fixing unit at the top are butt-jointed together.

The present application provides a fixing apparatus for a furnace wire of a furnace body heater, which is formed by assembling a plurality of fixing units. A structure of each of the fixing units includes: a front end structure and a tail end structure connected together. The front end structure is provided with a first recess and a second recess. The tail end structure is provided with a third recess and a fourth protrusion block. Two adjacent ones of the fixing units form a first splice structure, in the first splice structure, the fourth protrusion block of the fixing unit at the top is snap fitted in the third recess of the fixing unit at the bottom to achieve fixation. An opening of a first recess of the fixing unit at the bottom and an opening of a second recess of the fixing unit at the top are butt-jointed together.

According to the present invention, provided is a heater including a heat generating member being conductive and configured to radiate heat rays by being fed with electric power, a tubular member constituted by a metal and accommodating the heat generating member, and an intermediate member arranged between the heat generating member and the tubular member and constituted by an electrically insulating material, wherein the intermediate member is arranged and/or configured to allow, among the heat rays radiated from the heat generating member, at least light having a wavelength of from 1 m to 2 m to pass through the intermediate member to reach the tubular member.

This composition includes a RuMoW alloy having, in atomic %, a chemical composition including Mo: greater than 0% and 49% or less and W: greater than 0% and 45% or less, and the total content of Mo and W in the RuMoW alloy is greater than 30% and less than 50%.

This composition includes a RuMoW alloy having, in atomic %, a chemical composition including Mo: greater than 0% and 49% or less and W: greater than 0% and 45% or less, and the total content of Mo and W in the RuMoW alloy is greater than 30% and less than 50%.

A manufacturing process for a food warming pad includes the following steps: a pad body with a groove formed on a second surface is manufactured by an integrated molding process; after the heating wire is embedded in the groove, an encapsulation glue is coated, and a drying operation is performed; after the encapsulation glue is completely cured, a controller is installed; and then, a test is performed to obtain a qualified food warming pad.

A manufacturing process for a food warming pad includes the following steps: a pad body with a groove formed on a second surface is manufactured by an integrated molding process; after the heating wire is embedded in the groove, an encapsulation glue is coated, and a drying operation is performed; after the encapsulation glue is completely cured, a controller is installed; and then, a test is performed to obtain a qualified food warming pad.

The invention relates to a heating element (7) for a furnace, which heating element comprises a sapphire glass tube (8) for receiving a heating coil (17) inside the sapphire glass tube (8). The sapphire glass tube (8) is gas-tightly connected to a borosilicate tube (14) and also to a quartz glass tube (15). The electrical connections at the ends lead through in a gas-tightly compressed manner. According to the invention, the tube element is made of sapphire (8) and is gas-tightly joined by transition glasses and glass solder to compensate for the different coefficients of thermal expansion. The joined elements (14, 15) are located outside the firing chamber (2) so that they ensure operational reliability in the case of a thermal effect of up to 500 C. Furthermore, for firing/sintering the ceramic element (4) with shortwave infrared radiation in the range of from 0.8 m to 2.5 m, the heating element (7) has stable optical, electrical and mechanical properties and thus high-quality, permanently uniform firing and sintering results are ensured with significantly shortened firing-sintering times. No changes to the surface of the heating elements (7) occur which are caused by chemical influences or evaporations from the fired-sintered elements. No contamination of the sintered objects and the firing chamber occurs which is caused by the heating element (7). The heating element (7) can be used at an operating temperature up to 1900 C. and thus ensures use over long uptimes.

The invention relates to a heating element (7) for a furnace, which heating element comprises a sapphire glass tube (8) for receiving a heating coil (17) inside the sapphire glass tube (8). The sapphire glass tube (8) is gas-tightly connected to a borosilicate tube (14) and also to a quartz glass tube (15). The electrical connections at the ends lead through in a gas-tightly compressed manner. According to the invention, the tube element is made of sapphire (8) and is gas-tightly joined by transition glasses and glass solder to compensate for the different coefficients of thermal expansion. The joined elements (14, 15) are located outside the firing chamber (2) so that they ensure operational reliability in the case of a thermal effect of up to 500 C. Furthermore, for firing/sintering the ceramic element (4) with shortwave infrared radiation in the range of from 0.8 m to 2.5 m, the heating element (7) has stable optical, electrical and mechanical properties and thus high-quality, permanently uniform firing and sintering results are ensured with significantly shortened firing-sintering times. No changes to the surface of the heating elements (7) occur which are caused by chemical influences or evaporations from the fired-sintered elements. No contamination of the sintered objects and the firing chamber occurs which is caused by the heating element (7). The heating element (7) can be used at an operating temperature up to 1900 C. and thus ensures use over long uptimes.

A substantially solid brick of non-volatile bituminous material has a shape that is defined by an irregular outer surface to minimize surface contact with nearby bricks when shipped in bulk. The overall shape is preferably that of a modified tetrahedron having three non-planar face surfaces, a top surface, and a surface or point. Both the top and bottom surfaces are preferably modified domed shapes comprised of several sections. The face sections are preferably modified concave surfaces comprised of several triangular sections that can be planar, concave, or convex. Curved edges connect the face sections to each other and can include several planar edge sections. The bituminous material can include additives, and the brick can further include a skeleton distributed throughout. The skeleton can be a customizable matrix, framework of fiber groups, or other structure and can include customizable buoyant features such as air pockets or capsules.