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"Precision ceramics", "technical ceramics", and "advanced ceramics" are all terms that encompass the ceramics that provide us with high-performance mechanical, thermal, or electrical properties. They are very suitable for being applied to extreme application environments involve high temperature, high friction, high voltage, and high compressive load due to their excellent properties.
This datasheet shows the performance of our main materials including alumina properties, zirconia properties, silicon carbide sic properties, silicon nitride properties. It will help you find the material you need by understanding the relative properties of each material.
If you want to know more in-depth information, or you need technical support from our experienced engineer team, please contact us.
| Yongzhou Mingrui Ceramic Technology Co., Ltd. | ||||||||||
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| Email: admin@mingruiceramic.com | Phone/WhatsApp: +86 18122974730 | |||||||||
| Material | Alumina (Al2O3) | Zirconia | Silicon Carbide | Silicon Nitride | ||||||
| Properties | Units | 99.99% Al2O3 | 99.70% Al2O3 | 99.50% Al2O3 | 99% Al2O3 | 97% Al2O3 | 95% Al2O3 | ZrO2 | SiC | Si3N4 |
| Density | (g/cm³) | 3.95 | 3.94 | 3.9 | 3.8 | 3.75 | 3.7 | 5.9–6.0 | 3.18 | 3.2 |
| Straightness | (‰) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Hardness | (Mohs Scale) | 9 | 9 | 9 | 9 | 8.9 | 8.8 | 8.8 | 9.5 | 9 |
| Water Absorption | (%) | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 | 0 | 0 | 0 |
| Bending Strength | (Typical 20℃) (MPa) | 375 | 375 | 370 | 340 | 320 | 304 | 1200 | 400 | 800 |
| Compressive Strength | (Typical 20℃) (MPa) | 2300 | 2300 | 2300 | 2210 | 2100 | 1910 | 2500 | 2000 | 3000 |
| Max Working Temperature | (℃) | 1750 | 1750 | 1750 | 1700 | 1650 | 1500 | 1050 | 1650 | 1400 |
| Coefficient of Thermal Expansion | (25℃ to 800℃) (10⁻⁶/℃) | 8 | 7.8 | 7.8 | 7.7 | 7.6 | 7.5 | 10 | 4.7 | 5.1 |
| Fracture Toughness | (MPa·m¹/²) | 4.4 | 4.3 | 4.3 | 4.2 | 4 | 3.8 | 10 | 4 | 6.0-7.0 |
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Dielectric Strength (5mmThickness)
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AC-kv/mm | 9 | 8.7 | 8.7 | 8.7 | 8.5 | 8.3 | 9 | 0 | 10 |
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Dielectric Loss
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(25°C@1MHz) | <0.0001 | <0.0001 | <0.0001 | 0.0001 | 0.0002 | 0.0002 | 0.001 | <0.0001 | <0.0001 |
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Dielectric Constant
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25℃@1MHz | 9.8 | 9.7 | 9.7 | 9.5 | 9.3 | 9.2 | 29 | 9 | 6 |
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Electrical Resistivity (25℃)
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Ω⋅mm²/m |
＞10¹⁴
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＞10¹⁴ | ＞10¹⁴ | ＞10¹⁴ | ＞10¹⁴ | ＞10¹⁴ | >10¹² | / | / |
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Thermal Conductivity (25℃)
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W/m·K | 30 | 30 | 30 | 29 | 27.5 | 25 | 2.5 | 146 | 26 |
