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Carbide is a high temperature resistant material. Many of these carbides have softening points above 3000 ° C. Most carbides are more resistant to oxidation than carbon and graphite. Many carbides have high hardness and good chemical stability. There are four methods for making metalloid carbides:
(1) It is prepared by mixing metal oxide with carbon black and heating it in a graphite tubular resistance furnace or vacuum electric furnace to 2000-2500 ° C;
(2) Metal and carbon are synthesized under the protective atmosphere of hydrogen, carbon monoxide or methane at a high temperature of 1200-2000 ° C;
(3) Synthesized from carbonized metal (or its oxide) containing carbon gas;
(4) A metal halide, carbon monoxide, and a gas mixture of carbon or hydrogen interact to obtain a vapor-deposited carbide.
General products can use conventional molding methods. For products with complex shapes, liquid slurry casting and injection molding can be used. They have a covalent bond structure and are difficult to sinter. Atmospheric pressure sintering method, reaction sintering method, hot-pressing sintering method, dipping method and recrystallization method are mostly used. Carbide ceramics are widely used as heat-resistant materials and super-hard tools.
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Ceramic tube Thermocouple protection tube superalloy smelting tube		Ceramic rod Ceramic shaft sleeve insulated refractory rod ceramic shaft.
Ceramic crucible High quality and high temperature resistant crucible for metal smelting.		T-shaped concave convex tube High temperature insulator porcelain mouth porcelain sleeve porcelain eye porcelain bead
Ceramic plate Alumina plate, ceramic plate, bearing plate, insulating plate.		Ceramic gasket High temperature resistant ceramic ring, insulating washer.
Screw nut Insulating screws, corrosion-resistant bolts, heat-resistant screws.		Ceramic ball Alumina and zirconia ultrafine grinding media.