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alumina ceramics electronic insulation mechanical wear-resistant parts industrial accessories
product name:alumina ceramics
Introduction of alumina ceramics:
Alumina ceramic is a kind of precision ceramic material, which is a kind of ceramic material with a-Al2O3 oxygen as the main crystal phase. It is widely used in all walks of life. It mainly includes electronics, textile, chemical industry, construction and aerospace and other fields. It is the most widely used and high-yield new ceramic material in ceramic products.
Uses of alumina ceramics
Alumina ceramics are divided into two categories, one is high alumina ceramics, and the other is corundum ceramics. High-alumina ceramics are ceramics with Al2O3 and SiO2 as the main components, so that the indicators of high-alumina ceramics are improved. Due to the different main crystal phases in the ceramic body, it is divided into corundum mullite ceramics and mullite ceramics.
Mechanical aspects : cutting tools, ball valves, grinding wheels, ceramic nails, bearings, industrial valves ( cock valves, gate valves, globe valves, ball valves, etc. )
Electronics and electricity : ceramic base plate, substrate, ceramic membrane, transparent ceramics, ceramic electrical insulation porcelain, electronic materials, magnetic materials.
Medical aspects : artificial bones, artificial joints, artificial teeth, etc.
Alumina ceramic characteristics : high mechanical strength, high insulation resistance, high hardness, wear resistance, corrosion resistance, high temperature resistance, low thermal expansion, high thermal conductivity, high mechanical strength and a series of excellent performance. It can resist the erosion of gold and slag, and can also be used as an insulator in the electronics industry and other industries.
products index:
| Ceramic characteristic table | |||
| name | 99% AL2O3 | 95% AL2O3 | |
| physical propertyessential component | essential component | AL2O3≥99% | AL2O3≥95% |
| Density(g/cm3) | 3.85 | 3.6 | |
| water absorption% | 0 | 0 | |
| sintering temperature | 1690 | 1670 | |
| material characters | Hardness(HV) | 1700 | 1600 |
| break off strength | >6500 | >2900 | |
| compressive strength | 30000 | 25000 | |
| thermal response | maximum service tempera- ture | 1500 | 1400 |
| thermal expansion coefficient | 8 | 7.8 | |
| 10-6/℃ | |||
| 0-1000℃ | |||
| Heat shock resistance T(℃) | 200 | 220 | |
| thermal conductivity W/m.k | 31 | 22 | |
| electrical specification | volume resistivity Ω.cm | >1012 | >1012 |
| Insulation destructive power KT/m | 18 | 16 | |
| dielectric constant 1MHZ(E) | 9.2-10.5 | 9.0-10 | |
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