High heat resistant Insulation Alumina ceramic washer
1. Description
1. Name: Alumina Ceramic washer
2. Size: as customers' drawing
3. Al2O3 Content: 95%/99% alumina
4. Color: white or ivory
5. Working Temperature: 1500-1700 degree
6. Feature: high mechanical strength, good insulation&high wear resistant, etc.
7. Application: for refractory furnace or Kiln, electron vacuum decices, spaceflights, pharmaceutical engineerings Or Other Mechanical Applications
2.Application of Alumina ceramic
Alumina ceramic are widely used in roller kilns for firing wall tile, floor tile, table ware, sitall tile, magnetic materials and electronic ceramic,etc.
2. Technical Parameter:
| Item | Unit Symbol | 95% Alumina Ceramics | 99% Alumina Ceramics | 99.7% Alumina Ceramics |
| Maximum Using Temperature | ℃ | 1600 | 1700 | 1700 |
| Water Absorption | % | 0 | 0 | 0 |
| Hardness | Gpa | ≥85 | ≥89 | ≥89 |
| Flexural Strength | MPa (psi x 103) | 336 | 550 | 550 |
| Compressive Strength | MPa (psi x 103) | 2000 | 2500 | 2500 |
| Fracture Toughness | Mpa | 4~5 | 5.6 | 6 |
| Thermal Conductivity | W/m °K | 18-25 | 30 | 30.4 |
| Thermal Shock Resistance | °C | 220 | 180-220 | 180-220 |
| Dielectricity Constant | | 9.4 | 9.8 | 9.8 |
| Dielectric Strength | kV/mm | 16 | 22 | 22
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