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  • Industrial alumina ceramics

    Time:2021-01-28   Hits:2124
    Alumina ceramics are divided into high purity type and common type two kinds.

    1, high purity alumina ceramic system Al2O3 content in more than 99.9% of ceramic materials, due to its sintering temperature up to 1650-1990℃, transmission wavelength of 1 ~ 6μm, generally made of molten glass to replace platinum crucible; Using its light transmittance and alkali metal corrosion resistance as sodium lamp tube; In the electronics industry can be used as integrated circuit base board and high frequency insulation material.

    2, the general alumina ceramic system according to Al2O3 content is divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain and other varieties, sometimes Al2O3 content in 80% or 75% is also classified as ordinary alumina ceramic series. The 99 alumina porcelain material for the production of high temperature crucible, furnace tube and special wear-resistant materials, such as ceramic bearings, ceramic seals and water valve pieces; 95 alumina porcelain is mainly used as corrosion resistant and wear resistant parts; Due to the addition of talc, the electrical properties and mechanical strength of the porcelain can be improved. It can be sealed with molybdenum, niobium, tantalum and other metals, and some of them can be used as electric vacuum devices.

    1) the hardness

    According to the measurement of Shanghai Institute of Ceramics, the Rockwell hardness is HRA80-90, the hardness is second only to diamond, far more than the wear resistance of wear steel and stainless steel.

    2) Excellent wear resistance

    The abrasion resistance is 266 times that of manganese steel and 171.5 times that of high chromium cast iron, measured by the powder metallurgy Institute of Central South University. According to our customer tracking survey for more than ten years, under the same working conditions, the service life of the equipment can be extended at least ten times.

    3) Light weight

    Its density is 3.5g/cm3, only half of steel, can greatly reduce the load of equipment.