ZrC Zirconium Carbide Powder
English name: Zirconium Carbide
CAS no. : 12070-14-3
EINECS no. : 235-125-1
Molecular formula: ZrC
Molecular weight: 103.2347
The density of 6.73
Zirconium carbide ceramics. The chemical formula is ZrC, gray, face-centered cubic lattice. The melting point is 3540 ℃, the theoretical density is 6.66g/cm3, the thermal expansion coefficient is 6.7×10-6C-1, the microhardness is 2600kg/mm2, the resistivity is 57~75 ·cm, the temperature of intense oxidation is 1100~1400 ℃. Insoluble in hydrochloric acid, but soluble in nitric acid. Powder is generally made by reducing ZrO2 with carbon, and then after molding, sintering and ceramics. It can be used as electrode, refractory crucible and cathode electron emission material.
Dark gray cubic crystal with metallic luster, brittle. Melting point is 3540 ℃. The boiling point of 5100 ℃. The apparent density is 6.70g/cm3. Mohs hardness 8 ~ 9. Insoluble in cold water and hydrochloric acid. Soluble in hydrofluoric acid containing nitric acid or hydrogen peroxide and hot concentrated sulfuric acid. Zirconium tetrachloride is formed by reaction with chlorine gas at high temperature. At 700℃, zirconia is generated by combustion in air and does not react with water.
High purity, small particle size, uniform distribution, large specific surface area, high surface activity, low density, high temperature resistance, oxidation resistance, high strength, high hardness, good thermal conductivity.
Zirconium carbide used in fiber: different zirconium carbide silicon carbide powder content and the way of adding the near infrared absorption properties of the fibers, when the zirconium carbide and silicon carbide fiber content is 4% (weight), near infrared absorbing properties of the fiber best, add zirconium carbide and silicon carbide in the shell of fiber near infrared absorption effect is superior to add in the core layer effect;
2 zirconium carbide is applied in the new thermal insulation and temperature regulating textiles: zirconium carbide has the characteristics of efficient absorption of visible light, reflect infrared ray, when it absorbs the shortwave energy of 2 m below 95% of the sunlight, through heat conversion, energy can be stored in the material, it also has the characteristics of reflection more than 2 m infrared wavelength. Zirconium can be used in the new type of heat preservation and temperature-regulating textiles.
Zirconium carbide is used in hard alloy, powder metallurgy, abrasive, etc. Zirconium carbide is an important high melting point, high strength and corrosion resistance of high temperature structural material. Its excellent characteristics make it have great application space in cemented carbide. It can improve the strength and corrosion resistance of hard alloy.
4. Zirconium carbide can be used in coatings as high temperature resistant coatings to improve the surface properties of materials;
5. Zirconium carbide (ZRC) modifier of carbon-carbon composite functional materials: the modification of carbon fiber can greatly improve the strength of carbon fiber. Improve carbon fiber fatigue resistance, enhance wear resistance and high temperature resistance. The modification effect of aerospace carbon fiber material is very obvious.