99 alumina wear-resistant porcelain eye ceramic wire stranding machine twisted bow twisted copper textile ceramic beads
3×4.2×1.7 means:a,b,c size as below picture shows
Alumina ceramics mainly includes alimina , which applys to thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high- temperature resistance. Alumina ceramics is widely used in all sorts of field to meet the needs of daily use and special performance.Alumina electrical ceramics have low dielectric constant, low dielectric loss, high insulation strength, high volume resistivity, good bending strength, high stability, high compressive strength and good cold and hot shock denaturation. It is widely used in temperature controllers, insulation parts, thermal equipment, electric heating equipment, iron structure buildings, shipbuilding, etc.Classification of alumina ceramics:
High-purity alumina ceramics are ceramic materials containing more than 99. 9% aluminum. Because their sintering temperature is as high as 1650-1990℃ and transmission wavelength is 1-6MM, they are generally made into molten glass instead of platinum crucible. It can be used as sodium lamp tube according to its light transmittance and alkali metal corrosion resistance ; It can be used as integrated circuit substrate and high frequency insulating material in electronic industry.
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