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Characteristics and application of zirconium carbide powder

2019-05-07
The zirconium carbide powder has high purity, small particle size, uniform distribution, large specific surface area, high surface activity, and low bulk density. Dark gray with metallic luster crystals. Crisp. The melting pint is 3540 ° C and boiling point is 5100 °C. The apparent density is 6.70 g/cm3. Mohs hardness is 8-9. Do not dissolve in cold water and hydrochloric acid. It is soluble in hydrofluoric acid and hot concentrated sulfuric acid containing nitric acid or hydrogen peroxide. It reacts with chlorine gas at high temperature to form zirconium tetrachloride. At 700 ° C, it is burned in air to form zirconia. Does not react with water.
 
It has the characteristics of high temperature resistance, oxidation resistance, high strength, high hardness, good thermal conductivity and good toughness. It is an important high-temperature structural material with high melting point, high strength and corrosion resistance, and has the characteristics of efficiently absorbing visible light, reflecting infrared rays and storing energy.
 
Used as a raw material for solid propellants in rocket engines. Used to produce alloy steel. It is also a raw material for the production of metallic zirconium and zirconium tetrachloride, as well as promising fine ceramic materials.

 
Zirconium carbide powder application areas:
 
Nano-zirconium carbide applied to fiber: Different zirconia silicon carbide micropowder content and addition method have an effect on the near-infrared absorption properties of the fiber. When the content of zirconium carbide or silicon carbide in the fiber reaches 4% by weight, the near-infrared absorption property of the fiber Preferably, the near infrared absorption effect of adding zirconium carbide and silicon carbide to the shell layer of the fiber is superior to the effect of addition in the core layer.
 
Nano-zirconium carbide is used in new insulation and temperature-regulating textiles, and zirconium carbide has the characteristic of efficiently absorbing visible light and reflecting infrared rays. When it absorbs a short-wavelength energy source of less than 2 μm, which accounts for 95% of sunlight, energy can be stored in the material by thermal conversion. It also has the property of reflecting infrared wavelengths in excess of 2 μm. The infrared wavelength generated by the human body is about 10 μm. When people wear a nano-zirconium-containing textile garment, the human body infrared rays will not easily be emitted outward. This shows that zirconium carbide has ideal heat absorption and heat storage properties and can be applied to new thermal insulation textiles.
 
Nano-zirconium carbide is applied to cemented carbide, powder metallurgy, abrasives, etc.: Zirconium carbide is an important high-temperature structural material with high melting point, high strength and corrosion resistance. Its excellent characteristics make it a great application space on cemented carbide. Cemented carbide strength, corrosion resistance, etc. can be improved.
 
Nano-zirconium carbide can be applied to coatings as a high-temperature coating to improve the surface properties of the material.
Modifier for composite functional materials - Zirconium carbide: Used to modify carbon fiber can greatly improve the strength of carbon fiber, improve fatigue resistance and wear resistance and high temperature resistance. Through the detection of modified carbon fiber, all indicators have surpassed the foreign level, and the effect of aerospace carbon fiber material modification is widely used.