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What is titanium carbide?
TiC is a 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 titanium atoms. These bonded atoms are similar in many ways to metals. For example, they have a high melting temperature, a high boiling temperature, and high hardness. Their electrical conductivity is also good. TiC can be used in a variety of products, including cermets (heat-resistant alloys), cemented carbides (anti-wear materials), high-temperature radiation materials, and high-temperature vacuum devices.
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 pressed in a hydrogen-filled atmosphere in either a vertical or horizontal carbon tube heater. At 19002300degC reduction to get block TiC and then pulverization for 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 solution), sponge Titanium and titanium alloy are combined in full proportions and heated at 1500-17degC 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 325 mesh), mixed with carbon-black, is molded at a pressure of 0.98 Pa. It was then placed into a container of graphite and heated up 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:
The steam from the titanium tetrachloride mixture is then mixed with hydrocarbons containing hydrogen (benzene, methane, etc.). 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 titanium carbide has a different form depending on the reaction conditions.
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