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Titanium carbide is light gray, cubic crystal system, insoluble in water, and it has high chemical stability. Titanium carbide hardly reacts with hydrochloric acid and sulfuric acid, but it can be dissolved in aqua regia, nitric acid and hydrofluoric acid, and it is also soluble in alkaline oxide solutions.
Titanium carbide is an iron gray crystal with metallic luster, which belongs to the simple cubic structure of NaCl type. The carbon atoms and titanium atoms between TiC are equivalent to atoms bonded by strong covalent bonds in the lattice position. It has several characteristics similar to metals, such as high melting point, high boiling point and hardness. The hardness is second only to diamond.

Titanium carbide powder has good thermal and electrical conductivity, and shows superconductivity even at extremely low temperatures. Therefore, TiC is widely used in the manufacture of cermets, heat-resistant alloys, cemented carbides, anti-wear materials, high-temperature radiation materials and other high-temperature vacuum equipment. And other fields have a wide range of applications.

Titanium carbide powder preparation methods:

Titanium dioxide and carbon black as raw materials:
The high-purity titanium dioxide and carbon black are fully mixed in proportion, and the dry powder mixture is press-formed in a hydrogen atmosphere using a horizontal carbon tube furnace or a vertical carbon tube furnace. At 1900-2300degC, reduction to obtain block TiC, and then pulverization to obtain titanium carbide powder product. Or using sponge titanium and carbon black as raw materials, sponge titanium (or titanium alloy, titanium waste recovered from carbide solid solution) and carbon black are fully mixed in proportion, and heated to 1500-1700degC in a high-purity hydrogen stream, and finally obtain titanium carbide.

Direct carbonization of titanium metal:
Titanium powder (reduced by sodium or decomposed from titanium hydride, less than 325 mesh) is mixed with carbon black, and molded under a pressure of about 0.98 Pa. Then it was put into a graphite container and heated to 15001700degC in a stream of high-purity hydrogen to infiltrate the carbon. The reaction temperature and holding time depend on the type of raw material, particle size and reaction performance.

Gas phase reaction method:
The steam of titanium tetrachloride is mixed with hydrogen-containing hydrocarbons (methane, benzene, etc. ), and then sent to the titanium carbide deposited by induction heating or other methods. The reaction precipitates titanium carbide on the substrate. The reaction conditions such as the concentration ratio of the reaction gas, the reaction temperature and the gas flow rate are different, and the form of the precipitated titanium carbide is different.

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