| Name | Circular plate | Square plate | |
| Chemical composition | Al2O3 | ≥99 | ≥99 |
| R2O | ≤0.2 | ≤0.2 | |
| Fe2O3 | ≤0.1 | ≤0.1 | |
| SiO2 | ≤0.2 | ≤0.2 | |
| Bulk Density（g/cm2） | ≥3.80 | ≥3.80 | |
| Porosity（%） | ＜1 | ＜1 | |
| Bending strength（Mpa） | ＞350 | ＞350 | |
| Compressive strength（Mpa） | ＞12000 | ＞12000 | |
| Dielectric constant∑（1MHz） | 2 | 2 | |
| Highest temperature（℃） | 1800 | 1800 | |
Good chemical stability and thermal shock resistance, high temperature.
| Standard | Use | |
| Dimensions(mm) | Roasting electronic products, high-temperature base material, ceramic cover | |
| OD | Thickness | |
| ＜310 | ＞3 | |
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