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to Properties of ceramics
(submitted by the website administration)
| Alumina ceramic ( 94% AL2O3) | ||||
| Chemical composition: 94% AL2O3 | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 3.69 *10³ | kg/m³ | 230.4 | lb/ft³ |
|---|---|---|---|---|
| Modulus of elasticity | 300 | GPa | 43500 | ksi |
| Flexural strength | 330 | MPa | 47900 | psi |
| Compressive strength | 2000 | MPa | 290000 | psi |
| Fracture toughness | 3.5 | MPa*m½ | 3.5 | MPa*m½ |
| Hardness | 1175 | HV | 1175 | HV |
| Thermal expansion (20 ºC) | 7.3*10-6 | ºCˉ¹ | 4.1*10-6 | in/(in* ºF) |
| Thermal conductivity | 18 | W/(m*K) | 125 | BTU*in/(hr*ft²*ºF) |
| Specific heat capacity | 880 | J/(kg*K) | 0.21 | BTU/(lb*ºF) |
| Max. working temperature | 1600 | ºC | 2910 | ºF |
| Dielectric strength (DC) | 8.7 | KV/mm | 220 | V/mil |
| Dielectric constant (1MHz) | 9.0 | - | 9.0 | - |
