Alumina ceramic tube features

Alumina ceramic tube features:

Alumina ceramics are divided into two types: high purity type and common type.

High-purity alumina ceramics are ceramic materials with Al2O3 content above 99.9%. Due to its sintering temperature as high as 1650 -- 1990℃ and transmission wavelength of 1 -- 6 m, fused glass is generally made to replace platinum crucibles. Its light transmittance and alkali resistance to metal corrosion are used as sodium lamp tube. In the electronics industry, it can be used as integrated electric subgrade board and high frequency insulation material.

Ordinary alumina ceramic system is divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain and other varieties according to the content of Al2O3, sometimes Al2O3 content in 80% or 75% also classified as ordinary alumina ceramic series. Among them, 99 alumina ceramic materials are used for making high temperature crucibles, fireproof tubes and special wear-resistant materials, such as ceramic bearings, ceramic seals and water valve plates. Alumina ceramics are mainly used as corrosion-resistant and wear-resisting parts. Because part of talc is often mixed in 85 porcelain, the electrical property and mechanical strength are improved. It can be sealed with molybdenum, niobium, tantalum and other metals, and some of them are used as electrical vacuum devices.

Alumina ceramic workpiece is metallized at high temperature, which can withstand high temperature up to 1600 degrees, with good welding performance and high compressive strength up to 3000MPa. The surface of ceramic pieces can be coated with uranium, which plays a protective role.

Alumina ceramic parts forming method: hot die casting, isostatic pressure, dry pressure, oar injection and other processes, can be processed into any shape, any size, such as tubular, flake, block, shaped structural parts.