Alumina ceramics is a kind of to alumina (AL2O3) as the main body of the materials, used in thick film integrated circuit. Alumina ceramics has good conductivity, mechanical strength and high temperature resistance. Note that need ultrasonic for washing. Alumina ceramics is a kind of widely used ceramics. Because of its excellent performance, in the modern society application has been more and more widely, satisfied with the service and the need of special performance.
Alumina ceramics is divided into high purity type and ordinary type two kinds. High purity type alumina ceramics system Al2O3 content in more than 99.9% of the ceramic materials, because of its sintering temperature as high as 1650-1990 ℃, transmission wavelength for 1 ~ 6 μ m, generally made of molten glass to replace platinum crucible: using his pervious to light quality and alkali metal corrosive used for sodium lamp tube; In the electronics industry can be used as integrated circuit board and high frequency insulation material.
Ordinary alumina ceramics system according to different Al2O3 content is divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain etc varieties, sometimes Al2O3 content in 80% or 75% person also belong to common alumina ceramics series. 99 alumina porcelain material used to produce high temperature crucible, resistant to furnace tube and special wear-resistant materials such as ceramic bearing, ceramic packing and water valve plate, etc.; 95 alumina porcelain mainly used for corrosion resistance, wear parts; 85 porcelain because often incorporation of talc, improve the electrical and mechanical strength, but with molybdenum, niobium, tantalum metal seal, some used for electric vacuum unit device.
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