| Refractoriness (℃): | Refractoriness> 2000 |
|---|---|
| Feature: | Long Time Materials |
| Type: | Refractory Material |
| Shape: | Brick |
| Material: | Alumina Block |
| Purpose: | for High Wear-Resistance |
| Customization: |
|---|
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These items have wear-resistance,shock resistance,and convenient construction ect.They are wear-resisting and ideal material for material transportation equipment in industry such as petroleum,mine,steelworks,electric plant.And they can prolong the using cycle of equipment effectively.
Gongtao company can make special various wear-resistance parts based on the requirement and drawing.
| Item | Testing condition | Unit | 75% al2o3 | 90% al2o3 | 95% al2o3 | 99% al2o3 | 99.5% al2o3 | zirconia | steatite |
| Bulk density | g/cm3 | >3.20 | >3.40 | >3.60 | 3.7 | 3.7 | 6 | ≥2.6 | |
| Flexural Strength | N/m2×103 | 1.96 | 2.25 | 2.24 | >2.24 | >2.74 | 11 | 1.37 | |
| Coefficient of linear expansion | 20~800°C | ×10-6/°C | / | 6.3~7.3 | 6.5~8.0 | 6.5~8.0 | 6.5~8.0 | 9.5 | ≤8 |
| Permittivity | 1MHz | ≤9 | 8.5~9.5 | 9~10 | 9~10.5 | 9~10.5 | / | ≤7.5 | |
| 10GHz | / | / | 9~10 | 9~10.5 | / | / | / | ||
| Insertion loss | 1MHz | ×10-6 | ≤10 | ≤8 | ≤4 | ≤2.5 | ≤1.5 | / | ≤8.0 |
| 10GHz | ×10-6 | / | / | ≤10 | ≤6 | / | / | / | |
| Bulk density resistance | 100°C | Ω·Cm | >1012 | >1013 | >1013 | >1013 | >1014 | >1012 | >1012 |
| Puncture strength | KV/mm | 20 | 15 | 15 | 15 | / | / | 20 | |
| Thermal conductivity | 20°C | W/m·k | / | 16.8 | 25.2 | 25.2 | 29.2 | 3 | 2.9 |
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