Tantalum nitride for the hexagonal crystal gray. The relative density of 13.4; the melting point of 3090℃; thermal conductivity of 9.54W / (m • K), resistivity 128μΩ • cm, micro-hardness 3200kg/mm2, conversion point temperature 17.8K. Do not dissolve in water, acid, slightly soluble in aqua regia, dissolved in potassium hydroxide and decomposition of the release of ammonia. Heating to 2000 ℃ releases nitrogen. The tantalum nitride resistors are resistant to water vapor erosion due to the material used to make accurate sheet resistances. Used as a super-hard material additives, for spraying, increase the transformer, integrated circuits, the electrical stability of the diode.