Classification and preparation of alumina ceramics should meet the requirements
July 12, 2023
Classification and preparation of alumina ceramics should meet the requirements
Mecheng ceramic manufacturer is a professional manufacturer of alumina ceramics, because alumina ceramics have very superior performance advantages don't widely used in various fields, we know what classification of alumina ceramics? Alumina ceramic preparation should meet what requirements? This article will be introduced in detail for you.
Alumina ceramics is a kind of alumina (Al2O3) as the main body of ceramic materials, used in thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It is important to note that it needs to be washed with ultrasonic waves. Alumina ceramics are a versatile ceramic, and because of their superior properties, they have been used more and more in modern society to meet the needs of daily use and special performance. There are two types of alumina ceramics: high purity type and general type.
High-purity alumina ceramics are ceramic materials with Al2O3 content of 99.9% or more. Due to its sintering temperature of 1650-1990°C and transmission wavelength of 1-6μm, it is generally made into fused glass to replace platinum crucibles; its light transmission and resistance to alkali metal corrosion are used as sodium lamp tubes; in the electronics industry, it can be used as a substrate for integrated circuits 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 the Al2O3 content in 80% or 75% is also classified as ordinary alumina ceramic series. Among them, 99 alumina porcelain materials used to make high-temperature crucible, refractory furnace tube and special wear-resistant materials, such as ceramic bearings, ceramic seals and water valves, etc.; 95 alumina porcelain is mainly used as corrosion-resistant, wear-resistant components; 85 porcelain as often mixed with some talc, improve the electrical properties and mechanical strength, with molybdenum, niobium, tantalum and other metal sealing, some used as electric vacuum device devices.
Alumina ceramics in the manufacturing process, should meet the following three requirements.
① Strict control of chemical composition. The manufacturing process to prevent the mixing of impurities and volatilization of the composition itself, the sintered parts of the granularity, interface, porosity, etc. should be strictly controlled in order to achieve stable quality and reproducibility.
②The selected raw materials should be of high purity and the particles should be as fine as possible.
③ Precise shape and size. Alumina ceramic parts are generally used directly without processing, especially ceramic electronic devices require a high degree of precision.
The above is the content brought to you by Mecheng ceramics. Mei Cheng ceramic is a collection of research and development, production, sales in one of the electronic ceramics enterprises, start listed companies, is located in Xinhua County, Hunan Province, electronic ceramics industrial park, covers an area of 8W flat. Mainly engaged in: zirconia ceramics, alumina ceramics, talc ceramics and other non-oxide ceramics research and development and application.