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What is titanium carbide?
TiC is a light gray cubic crystal, which is not soluble in water. It has a high chemical stability and can be dissolved by aqua regia or nitric and hydrofluoric acids.
TiC has a metallic luster and is gray with an iron grey color. It belongs to a simple cubic NaCl structure. The lattice is 0.4329 nanometers. The space group Fm3m. TiC has strong covalent bonding between the carbon atoms, and the titanium atoms. These bonded atoms are able to exhibit properties similar to those of metals. For example, they have a high melting temperature, a boiling point that is higher than diamond’s, excellent thermal conductivity and good electrical conductivity. TiC can be used to produce cermets as well as heat-resistant metals, cemented carbide, anti-wear material, high temperature radiation materials, and other high-temperature equipment.
Method of synthesis of titanium carbide
As raw materials, titanium dioxide and carbon black are used.
The dry powder mixture of high-purity titania dioxide and carbon black is mixed proportionally and is then press-formed under a hydrogen-filled atmosphere in either a horizontal carbon-tube furnace or a carbon-tube furnace vertical. Reduce to block TiC at 19002300degC and then pulverize to get titanium carbide product. Or, using carbon black and sponge titanium as raw materials. Carbon black (or titanium alloy or titanium waste recovered in carbide solid solutions) and sponge Titanium are fully mixed proportionally and heated to 16001700degC with a high-purity hydrogen stream. Titanium carbide.
Direct carbonization of Titanium Metal:
Titanium powder (reduced with sodium or decomposed by titanium hydride) less than 325mesh is mixed and molded in a graphite vessel under pressure of approximately 0.98 Pa. It was then heated to 1500-17degC using a high-purity stream of hydrogen to infiltrate carbon. The reaction temperature, holding time and particle size are dependent on the raw material.
Gas phase reaction method:
Steam of titanium tetrachloride mixed with hydrocarbons containing hydrogen (benzene, methane) is used. After induction heating (or other methods), the steam is sent to deposit titanium carbide on the substrate. The reaction precipitates titania carbide on substrate. The precipitated form of titanium carbide differs depending on the reaction conditions.
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