Ceramic

Steatite & Cordierite Ceramics: The main raw materials for making ceramics are talc, cordierite, alumina, etc. 1. The main crystal phase of talc is original enstatite. It is a ceramic material made from talc as the main raw material, adding an appropriate amount of clay, bentonite and barium carbonate and sintering at high temperature. Has high strength and low dielectric loss. Used for high-frequency device parts, small-capacity high-power capacitors and fine-tuning porcelain dielectric heaters. 2. Ceramics in which cordierite (2MgO·2Al2O3·5SiO2) is the main crystal phase. Compressive strength 280~500MPa. Tensile strength 25~40MPa. Bending strength 50~60MPa. Impact strength 1.8～2.2cm·kg/cm2. Linear expansion coefficient (1.1～1.8)×10-6 (20～100℃). The average thermal conductivity is 3.35~5.02kJ/(m2·h·℃) (0~100℃). Resistant to hot and cold temperatures 300~500℃. Insulation resistance 2.3～5.6MΩ·cm (400～600℃). The dielectric loss angle tangent value is 200×10-4 (50Hz); 40×10-4 (500Hz). The refractoriness is about 1400℃.

Alumina Ceramics: Alumina ceramic is a ceramic material based on aluminum oxide (Al2O3) and is used in thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance.