Chinese name: Zirconium nitride
English name: Zirconium nitride (ZrN)
Subsize: 105.23
Subformula: ZrN
CAS number: 25658-42-8
Melting point: (2980 + -50) ℃
Density: 7.09
Molecular weight: 105.23
Precise molecular weight: 103.90800
The microhardness is about 9800~19600MPa
EINECS number: 247-166-2
MDL number: MFCD00049642
Solubility: Soluble in concentrated hydrofluoric acid, concentrated sulfuric acid and hot alkali, slightly soluble in dilute hydrochloric acid and dilute sulfuric acid.
Synthesis preparation method:
1. Direct nitriding of metal zirconium and nitrogen at 1100 ~ 1200℃.
2. Zirconium tetrachloride method is adopted. Using zirconium tetrachloride and ammonia as raw materials to prepare zirconium nitride, the reaction formula is as follows. Zirconium tetrachloride first forms an admixture with ammonia, which is then heated to 750 ° C to convert to zirconium tetrachloride (Zr3N4), and further heated to 1200 ° C to convert to zirconium nitride (ZrN). Zirconium nitride can also be prepared by the reaction of zirconium tetrachloride and ammonia in the presence of hydrogen at more than 1000℃.
Zirconium nitride application:
1) Zirconium nitride has good neutron properties, thermal physical properties and chemical stability under high temperature environment,
Its own melting point is high, is one of the fourth generation nuclear fission system IMF material selection requirements of the system.
(Zr-N) compounds have various crystal structures depending on their composition. For example, in the Zr-N alloy system, the alloy compounds found were ₄ ZrN, O-Zr-₃ N₄, and C-Zr-₃ N₄. They not only have excellent chemical properties, not only can be used in Josephson junction, diffuse layering, low thermometer, etc., but also can be used in three-dimensional integrated electric coils, metal based transistors. At the same time, these Zr-N compounds are superior to pure zirconium in wear resistance, oxidation resistance and corrosion resistance, and have a high superconducting critical temperature, so they can be a good superconductor and have a high use value.
2) Zirconium nitride is mainly used in atomic energy industrial reactor protective layer alloy material, aerospace rocket engine jet high-temperature alloy material, artillery missile alloy material, but also the production of petrochemical reductive chloride reactor or container corrosion resistant material, but also widely used in industrial fields, such as as car accessories, Mobile phones and other communication equipment and cameras and other digital products such as corrosion resistance layer and decorative layer and diffusion barrier layer of circuit devices.
3) Zirconium nitride is mainly used in other fields: according to its excellent electrical conductivity, it can be used as an electrical contact layer in the electronics industry, and according to its low friction coefficient and good sliding property, it is applied as a composite layer in tribology.
4) For the preparation of metal zirconium and zirconia. It is also used in the manufacture of hot pressing crucible, refining metal aluminum, bismuth, cadmium, lead, tin and as an acid storage vessel.
