Material of precision industry ceramic:
Usuaully the precision industry ceramic materials are alumina ceramic and zirconia ceramic,silicon nitride ceramic and so on.
Alumina precision industry ceramic：
1.They have high mechanical strength. The flexural strength of sintered alumina ceramic products can reach 250MPa, and that of hot-pressed products can reach 500MPa. The strength can be maintained up to 900℃ at high temperatures.
2. High alumina ceramics have a high resistivity and excellent electrical insulation performance. The resistivity at room temperature is 1015Ω·cm, and the insulation strength is 15kV/mm.
3.High hardness, with a Mohs hardness of 9.
zirconia precision industry ceramic：
1.Zirconia ceramics have high strength and good toughness, and can be made into mechanical parts such as push rods, connecting rods, ceramic bearings, ceramic cylinder liners and piston caps.
2.Zirconia ceramic have high hardness, with a Mohs hardness of 8.5 to 9.1.
3.Insulating, free from the pollution of metals and electroplating, it is an ideal environmentally friendly material for the watch industry. Rich in color, extremely hard, beautiful and durable, non-damaging to the skin,and other products have an extraordinary texture and visual appeal, making them a popular choice for many electronic product cases.
silicon nitride precision industry ceramic:
1.It is heat-resistant. Under normal pressure, Si3N4 has no melting point and decomposes directly at around 1870℃. It can resist oxidation up to 1400℃ and is actually used up to 1200℃(its mechanical strength will decrease above 1200℃).
2.Silicon nitride has high hardness and is wear-resistant. Its Mohs hardness is second only to that of diamond, cubic boron nitride, boron carbide and silicon carbide, and it is resistant to mechanical impact.
