Characteristics of alumina ceramic tube: Alumina ceramics are divided into two types: high-purity type and ordinary type.
High-purity alumina ceramic is a ceramic material with Al2O3 content of more than 99.9%, because its sintering temperature is as high as 1650-1990 °C, the transmission wavelength is 1-6μm, and it is generally made of molten glass to replace platinum crucible; Use its light transmittance and alkali metal corrosion resistance as sodium lamp; In the electronics industry, it can be used as an integrated circuit substrate and high-frequency insulation material.
Ordinary alumina ceramics are divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain and other varieties according to the different Al2O3 content, and sometimes Al2O3 content in 80% or 75% is also classified as ordinary alumina ceramic series. Among them, 99 alumina porcelain materials are used to make high-temperature crucibles, refractory furnace tubes and other wear-resistant materials, such as ceramic bearings, ceramic seals and water valve plates;
95 alumina porcelain is mainly used as corrosion-resistant and wear-resistant parts;
85 porcelain is often mixed with some talc, which improves the electrical properties and mechanical strength, and can be sealed with molybdenum, niobium, tantalum and other metals, and some are used as electric vacuum device devices.
Alumina ceramic workpiece is metallized at high temperature, with high temperature resistance up to 1600 degrees, good welding performance and high compressive strength up to 3000MPa. The surface of ceramic parts can be coated with uranium to play a protective role.
Alumina ceramic parts forming method: hot die casting, isostatic pressing, dry pressing, paddle injection and other processes, can be processed into any shape, any size, such as tubular, sheet, block, special-shaped structural parts.
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