Special state:We manufacture ceramic by customer's drawing and
requirement.
95% Al2O3 ceramic products have the characteristics of great compression strength,fine electrical property,corrosion resisting and antioxidation, etc. They are applied to vacuum device, instrument ceramics, line insulation, switches of bands, outlets of electronic tubes, inductance coil skeleton, capacitor pillars, holders, thick film and thin film circuit blocks, controllable silicon and solid circuit outer skin, sparking plug ceramics, textile ceramics, fuse-tube ceramics and high-temperature materials of construction, etc. |
Properties of electric ceramic material:
Properties Item | Unit and Symbol | 97%Al2O3 | 95%Al2O3 | 90%Al2O3 | 75%Al2O3 | Talcum Ceramic |
Bulk Density | g/cm3 | >4.0 | >3.6 | >3.4 | >3.2 | >2.6 |
Dismantle-resistant Strength | kgf/cm2 | 3880 | 2800 | 2300 | 2000 | 1200 |
Coefficient of the Mal Expansion 20ºC~500ºC | ×10-6mm/ºC | 6.8~7.8 | 6.5~7.5 | 6.3~7.3 | ≤6 | ≤8 |
Medium Electric Constant 1MHz20ºC | 10~11 | 9~10 | 9~10 | ≤9 | ≤7.5 | |
Tangent Value of Medium Loss Angle 1MHz20ºC~500ºC | ×10-4 | ≤3 | ≤4 | ≤6 | ≤10 | ≤20 |
Volume Resistivity at 100ºC | Ω·cm | >1015 | >1014 | >1013 | >1013 | >1013 |
Breakdown Strength | kv/mm | 24 | 15 | 15 | 20 | 20 |
The belowed is inspection equipments.
Vacuum Device, Instrument Ceramics Use Aluminium Oxide High Vacuum Ceramic