Alumina ceramic is divided into high purity type and common type two kinds. High purity alumina ceramic type of Al2O3 content of 99.9% or more of the ceramic materials, because the sintering temperature up to 1650-1990 ℃, transmission wavelength for 1 ~ 6 μ m, generally made into molten glass to replace the platinum crucible: use his pervious to light quality and alkali metal corrosive used as sodium lamp tube; In the electronics industry can be used for integrated the circuit board and high frequency insulating materials.
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