Generally speaking, structural ceramics refer to the ceramics used in the manufacture of mechanical equipment and machining tools in various industrial sectors. What are the commonly used ceramic materials in structural ceramics? Next, Pintejin ceramics will introduce to you.
1. Zirconia ceramics
Zirconia ceramics are white, yellow or gray when containing impurities, generally containing HfO2. It is not easy to separate. There are three crystalline states of pure ZrO2 under normal pressure.
The production of zirconia ceramics requires the preparation of powders with high purity, good dispersion properties, ultra-fine particles and narrow particle size distribution. Zirconia ceramics have high toughness, high flexural strength and high wear resistance, excellent thermal insulation performance, thermal expansion. The coefficient is close to the advantages of steel etc.
2. Alumina ceramics
The main composition of alumina ceramics is Al2O3. The general content is greater than 45%. Alumina ceramics have various excellent properties. High temperature resistance.
Generally, it can be used for a long time at 1600 ℃, corrosion resistance, high strength, its strength is 2~3 times that of ordinary ceramics, and it can be 5~6 times higher than that of ordinary ceramics. widely.
3. Silicon nitride ceramics
The main component of silicon nitride ceramics is Si3N4. This is a high temperature ceramics with high high temperature strength, high hardness, wear resistance, corrosion resistance and self-lubricating, and the linear expansion coefficient is the smallest among various ceramics.
The operating temperature is as high as 1400 ℃, and it has excellent corrosion resistance. In addition to hydrofluoric acid, it can resist the corrosion of other acids, and can resist the corrosion of alkali and various metals, and has excellent electrical insulation and radiation resistance.
4. Silicon carbide ceramics
The main component of silicon carbide ceramics is SiC, which is a high-strength, high-hardness, high-temperature-resistant ceramic. It can still maintain high flexural strength at 1200 ° C ~ 1400 ° C, and is currently the highest high-temperature strength ceramic.
Silicon carbide ceramics also have good thermal conductivity, electrical conductivity and high impact toughness, and are good high-temperature structural materials.
The above are the commonly used ceramic materials for structural ceramics brought to you by Pintejin Ceramics. Pintejin Ceramics is a manufacturer specializing in the production and machining of ceramics, focusing on the machining of alumina ceramic parts and zirconia ceramics, and can process ceramic products according to your needs.