The Properties And Application of Titanium nitride

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Titanium Nitride (TiN), a non-stoichiometric compound, has a structure similar to NaCl. It is a cubic face centered lattice, with lattice constants a=0.4241nm. In this structure, titanium atoms can be found at the corners tops of a face centered cubic. 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 crystalline forms 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 metals, but it also has a lower density. This makes TiN a heat-resistant metal. The TiN crystalline structure is very similar to TiC. However, the C atoms are replaced with N atoms.
Nature Introduction

TiN is an extremely stable compound. It will not reacted with metals, such as iron and chromium at high temperature. Also, TiN crucibles won’t react with acidic Slag in CO and N2 atmospheres. 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 has a beautiful golden color. It also has a very high melting temperature, possesses exemplary chemical stability, and is not wettable to metals. It is a superconductor with high electrical conductivity. It is also superconducting material.

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