| Properties | Units | 99.99% Al₂O₃ | 99.9% Al₂O₃ | 99.7% Al₂O₃ | 99.5% Al₂O₃ | 99% Al₂O₃ | 97% Al₂O₃ | 95% Al₂O₃ | Zirconia |
| Color | — | White | Ivory | Ivory | Ivory | Ivory | White | White | White/Black/Blue |
| Density | g/cm³ | ≥3.95 | ≥3.95 | ≥3.93 | ≥3.90 | ≥3.85 | ≥3.75 | ≥3.62 | ≥5.90 |
| Permeability | — | Pass | Pass | Pass | Pass | Pass | Pass | Pass | Pass |
| Airtightness | — | Pass | Pass | Pass | Pass | Pass | Pass | Pass | Pass |
| Straightness | % | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Hardness | HV Vickers | ≥1780 | ≥1780 | ≥1600 | ≥1500 | ≥1500 | ≥1460 | ≥1410 | ≥1200 |
| Water Absorption | % | 0.01% | ≤0.01% | ≤0.01% | ≤0.01% | ≤0.01% | 0.01% | ≤0.01% | 0.01% |
| Bending Strength | MPa | 500 | 500 | 450 | 400 | 350 | 320 | 300 | 890 |
| Compressive Strength | MPa | 2300 | 2300 | 2300 | 2300 | 2210 | 2100 | 1910 | 2915 |
| Max Working Temperature | °C | ≤1500 | ≤1500 | ≤1500 | ≤1500 | ≤1500 | ≤1450 | ≤1350 | ≤1200 |
| Coefficient of Thermal Expansion | 10⁻⁶/°C(25–800°C) | 8 | 7.8 | 7.8 | 7.8 | 7.7 | 8.3 | 8.4 | 10.1 |
| Fracture Toughness | MPa·m^(1/2) | 4.4 | 4.3 | 4.3 | 5.37 | 4.2 | 4 | 3.8 | 9.18 |
| Dielectric Strength | AC kV/mm | 28.38 | 28.01 | 26.72 | 23.5 | 22.5 | 18.44 | 17.84 | 9.6 |
| Dielectric Loss | 25°C,1MHz | ≤1×10⁻⁴ | ≤1×10⁻⁴ | ≤1×10⁻⁴ | ≤2×10⁻⁴ | ≤2×10⁻⁴ | ≤4×10⁻⁴ | ≤4×10⁻⁴ | ≤18×10⁻⁴ |
| Dielectric Constant | 25°C@1MHz | 10.18 | 10.2 | 10.26 | 7.8 | 10.04 | 9.3 | 9.6 | 29 |
| Electrical Resistivity | Ω·m | 1.0×10¹⁴ | 1.0×10¹⁴ | 1.0×10¹⁴ | 1.0×10¹⁴ | 1.0×10¹⁴ | 1.0×10¹³ | 1.0×10¹³ | 1.0×10¹² |
| Thermal Conductivity(25°C) | W/m·K | 26.0–32.0 | 26.0–32.0 | 18.0–24.0 | 16.0–22.0 | 16.0–22.0 | 12.0–18.0 | 12.0–18.0 | 1.2–3.0 |
| Heat Shock Resistance | 25°C~800°C | Pass | Pass | Pass | Pass | Pass | Pass | Pass | Pass |
| Acid Resistance (1:9H) | mg/cm² | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.1 |
| Alkali Resistance(10%NaOH) | mg/cm² | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.2 | ≤0.2 | ≤0.1 |
