Chinese name: Zirconium carbide

Molecular formula: ZrC

Cas: 12070-14-3

Appearance: black grey powder

Molecular weight: 103.23

Melting point: 3540°C

Density: 6.73g/ml

EINECS: 235-125-1

Chemical properties:
Dark gray metallic cubic crystal, brittle. Melting point 3540℃. Boiling point 5100℃. Apparent density 6.70g/cm3. Mohs hardness 8 ~ 9. Insoluble in cold water and hydrochloric acid. Soluble in hydrofluoric acid and hot concentrated sulfuric acid containing nitric acid or hydrogen peroxide. It reacts with chlorine gas at high temperatures to form zirconium tetrachloride. At 700 ° C, zirconia is produced by combustion in air and does not react with water. Zirconium carbide powder has the properties of high temperature resistance, high hardness, good thermal conductivity and good chemical stability. It is soluble in nitric acid, hot concentrated sulfuric acid, hydrofluoric acid and aqua regia, and easily soluble in molten caustic soda.
Preparation method:
The preparation of zirconium carbide has direct synthesis method, carbothermal reduction method, sol-gel method, self-propagating combustion synthesis method, plasma chemical vapor synthesis method, mechanical alloy method and low temperature synthesis method, etc., industrial generally uses carbon reduction ZrO2 to prepare.
Main uses:
1. Zirconium carbide applied to fiber: different zirconium carbide silicon carbide powder content and addition methods have an impact on fiber near-infrared absorption performance, when the fiber zirconium carbide or silicon carbide content reaches 4% (weight), fiber near-infrared absorption performance is good, zirconium carbide and silicon carbide added in the fiber shell of the near-infrared absorption effect is better than added in the core layer of the effect.
2. Zirconium carbide is used in new thermal insulation and temperature control textiles, thermal insulation nylon and polyester fiber, temperature regulation fiber, thermal insulation polyester material, thermal insulation conjugated polyester fiber, sunlight thermal storage and thermal insulation finishing, Tai chi steam lung vests, aerospace technology heating materials; Greatly improve the strength and fatigue resistance of carbon fiber, enhance the wear resistance and high temperature resistance, the application of aerospace carbon fiber material modification. Zirconium carbide has the characteristics of efficient absorption of visible light, reflection of infrared, when it absorbs 95% of the sunlight below 2μm short wavelength energy, through thermal conversion, energy can be stored in the material, it also has the characteristics of reflecting more than 2μm infrared wavelength. Zirconium carbide has ideal characteristics of heat absorption and heat storage, and the product can be used in new heat preservation and temperature control textiles.
3. Zirconium carbide used in cemented carbide, powder metallurgy, abrasives, etc. : Zirconium carbide is an important high melting point, high strength and corrosion resistance of high temperature structural materials. Its excellent characteristics make it have a lot of application space in cemented carbide. Can improve the strength of cemented carbide, corrosion resistance, etc.
4. Zirconium carbide can be applied to the coating as a high temperature resistant coating to improve the surface performance of the material;
5. Carbon carbon composite functional material modifier - zirconium carbide (zrc) : used to modify carbon fiber can greatly improve the strength of carbon fiber. Improve the fatigue resistance of carbon fiber, enhance the wear resistance and high temperature resistance. In the application of aerospace carbon fiber material modification, the effect is very obvious. ZrC zirconium carbide powder material, chemical formula ZrC, is a new type of material designed and produced by special process. Elastic modulus 35.5×103MPa, resistivity 57 ~ 75/μΩ·cm, compressive strength 1670MPa, coefficient of thermal expansion 6.7×10-6℃ (20-1000℃), microhardness 2930kg/mm-2, thermal conductivity 20.52 [W (m·K) -1] (20℃), atomic weight 103.22. The theoretical carbon content is 11.64%, the melting point is 3540℃, the theoretical density is 6.66g/cm3, and the temperature of the beginning of strong oxidation is 1100 ~ 1400℃. Insoluble in hydrochloric acid, but soluble in nitric acid. ZrC zirconium carbide powder material is a face-centered cubic structure, the lattice constant is 0.46930nm, the space group is Fm3m, the radius ratio of C atoms and Zr atoms is 0.481, less than 0.59, forming a simple interstitial phase, Zr atoms form a tight cubic lattice, C atoms are in the octahedral interstitial position of the lattice.
6.ZrC zirconium carbide powder material is the key material for the preparation of high-performance wear-resistant materials, high-temperature structural materials, cemented carbide, aerospace, atomic energy, textile, electronics, coating and metallurgical automation and other high-tech fields. 6 molecules of niobium carbide and 4 molecules of zirconium carbide compound solid solution (we can supply) can replace the expensive tantalum carbide, can produce high temperature and wear-resistant CNC tools; A mixture of 4 molecules of tantalum carbide and 1 molecule of zirconium carbide (which we can customize) has a high melting point and is a good thermionic emission; Zr-Ti alloy, Zr-Ti-C-B ceramic material, C/C-(Zr-Ti-C-B/SiC) composite material produced by zirconium carbide is a new material that can resist 3000℃ ablation, making supersonic flight possible, and providing high-end material solutions for the development of supersonic aircraft. ZrC zirconium carbide powder materials can be used for infrared detection, electrodes, refractory crucible and cathode electron emission materials. It can be used as an abrasive for the processing of various hard metals, corundum or glass; Zirconium carbide crucible and tool with wear and corrosion resistance can also be prepared. In addition, it can also be used in the nuclear fuel industry, electronic equipment, tools on the wear-resistant protective film, superhard film materials and high-brightness electron emission film.
7. Zirconium carbide can be used in the nuclear fuel industry, electronic equipment protective film, superhard film materials and high-brightness electron emission film. Because of its low neutron absorption cross section and good radiation resistance, it can be used as inert matrix materials in nuclear reactors, such as nuclear fuel cladding materials.
8. The low density loose zirconium carbide coating has good thermal stress resistance and insulation performance, which can be used as insulation materials, and the high density dense zirconium carbide coating has good permeability resistance and can be used as protective coating.
Packing storage:
This product is inert gas anti-static packaging, should be sealed in a dry, cool environment, should not be exposed to the air for a long time, prevent moisture agglomeration, affect the dispersion performance and use effect.