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What is titanium carbide?
The cubic crystals of TiC are light gray and have a high chemical stability. They can be dissolved by aqua regia or nitric and hydrofluoric acids, and they also dissolve in alkaline solution.
TiC has a metallic luster and is gray with an iron grey color. It is of the NaCl simple cubic type. 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 able to exhibit properties that are similar with metals. For example, they have a high melting temperature, high boiling temperatures, and a hardness only second to diamond. They also show good electrical conductivity and thermal conductivity. TiC can be used in the production of 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 Titanium 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 vertical carbon-tube furnace. Reduce 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 mixed fully in proportion, and heated to a temperature of 15001700degC with a high-purity hydrogen stream. Titanium carbide.
Direct carbonization of Titanium Metal:
Titanium powder (reduced with sodium or decomposed titanium hydride; less than 325 mesh), mixed with black carbon, is molded and heated at 1500-1700degC under the influence of a high purity hydrogen stream to infiltrate carbon. The reaction temperature, holding time and particle size are dependent on the raw material.
Gas phase reaction method:
Hydrocarbons such as benzene and methane are mixed into the steam from titanium tetrachloride. 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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