Zirconium carbide powder characteristics

2016-09-02

Zirconium carbide, chemical formula ZrC, relative atomic weight 103.22, the carbon 11.64%, typical of the NaCl type face-centered cubic structure with a lattice constant of 0.46930nm space group Fm3m, C atoms and Zr atomic radius ratio of 0.481, less than 0.59, the formation of simple clearance phase, Zr atoms form a tight cubic lattice, C atoms in the lattice octahedral interstitial sites. Zirconium carbide has a melting point 3540 ℃, the theoretical density of 6.73g / cm3, linear expansion coefficient of 7.2 × 10-6K-1, microhardness 2600kg / mm2, a resistivity of 57 ~ 75 / μΩ · cm, the oxidation start temperature of the strong 1100 ~ 1400 ℃, insoluble in hydrochloric acid, but soluble in nitric acid.

Zirconium carbide powder of high purity, small particle size distribution, surface area, low high surface activity, bulk density. High temperature, anti-oxidation, high strength, high hardness, good thermal conductivity, good toughness. It is an important melting point, high temperature strength and corrosion-resistant structural materials, and has the characteristics of efficient absorption of visible light, infrared reflection and energy storage and the like.

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