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Titanium Nitride (TiN), a non-stoichiometric compound, has a structure similar to NaCl. It is a face centered cubic lattice, with lattice constants a=0.4241nm. In this structure, titanium atoms can be found at the top of each corner. TiN has a nonstoichiometric composition, which is TiN0.37 – TiN1.16. Changes in nitrogen content are possible within a specified range without altering the structure of TiN. TiN powders are usually yellowish-brown, ultrafine powders are black and TiN Crystals are golden-yellow. TiN has an excellent thermal shock resistance, a melting temp of 2950degC and a density of 5-4.44g/cm3. TiN has a much higher melting temperature than most of the transition metal nitrides. However, it also has a lower density. This makes TiN a heat-resistant metal. The TiN crystal is very similar to TiC. However, the N atoms are used instead of C atoms.
It is very stable and will not react when exposed to CO and N2 at high temperature. TiN Crucibles are also not affected by acidic slag. It can be used with alkaline or acidic slag. TiN, when heated under vacuum, loses nitrogen and becomes titanium nitride that has a lower nitrogen content.
TiN is attractively golden in color. It also has a very high melting temperature, a good chemical stability, and a low wetting ability to metals. It is a superconductor with high electrical conductivity. It is also superconducting material.
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