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Features:
1.High strength,density ,fracture toughness and hardness
2.High stability,and good wear and corrosion resistance
3. Modulus of elasticity and coefficient of thermal expansion equivalent to steel
Mechanical Characteristics
| Bulk Density(g/cc) | Water Absorption(%) | Vickers Hardness(GPa) | Flexural Strength(MPa) | Compressive Strength(MPa) | Young's Modulus of Elasticity(GPa) | Poisson's Ratio | Fracture Toughness(MPa√m) | ||
| Al2O3 | 92.0 | 3.60 | 0 | 12.5 | 360 | 2200 | 280 | 0.23 | – |
| 97.0 | 3.70 | 0 | 13.8 | 350 | 2250 | 330 | 0.23 | 3 | |
| 99.8 | 3.92 | 0 | 18.0 | 380 | 2450 | 388 | 0.22 | 4-5 | |
| ZRO2 | 6.00 | 0 | 13.0 | 1250 | 5690 | 210 | 0.31 | 6-7 |
Thermal Characteristics
| Al2O3 | ZRO2 | |||
| 92.0 | 97.0 | 99.8 | – | |
| Coefficient of Linear Thermal Expansion/40-400°c (χ10-6/°c) | 7.0 | 7.1 | 6.8 | 10.0 |
| Thermal Conductivity(20°c) | 17.5 | 25 | 32 | 3 |
| Specific Heat (J/(kg.k)χ103) | 0.78 | 0.78 | 0.80 | 0.46 |
| Thermal Shock Resistance (°c) | 200 | 200 | 220 | 350 |
Electrical Characteristics
| Al2O3 | ZRO2 | |||
| 92.0 | 97.0 | 99.8 | - | |
| Volume Resistivity/20°c (Ω.cm) | >1014 | >1014 | >1015 | – |
| Dielectric Strength(KV/mm) | 16 | 16 | 20 | – |
| Dielectric Constant(1MHz) | 9.0 | 9.5 | 9.8 | – |
| Loss Tangent(Χ10-4) | 7.0 | 3.0 | 1.0 | – |
Chemical Characteristics
| Al2O3 | ZRO2 | |||
| 92.0 | 97.0 | 99.8 | – | |
| Nitric Acid/60%/ 90°c (WT Loss:mg/cm2/day) | <0.15 | < 0.12 | < 0.05 | 0 |
| Sulphuric Acid/95%/95°c | < 0.34 | < 0.30 | < 0.23 | < 0.04 |
| Caustic Soda/30%/80°c | < 0.95 | < 0.90 | < 0.04 | < 0.08 |
