Thermal Properties for Alumina Heater | ||||
Item | Unit | Value | ||
Vickers Hardness | Gpa | 11.5 | ||
Flexural Strength | Mpa | 300 | ||
Compressive Strength | Mpa | 2000 | ||
Modulus of Elasticity | Gpa | 300 | ||
Poisson's Ratio | --- | 0.22-0.23 | ||
Fracture Toughness | Mpam1/2 | 3.5-4.0 | ||
Thermal Conductivity | W/(m·k) | 25 | ||
Thermal Expansion Coefficient | 10-6/℃ | 6.5-7.5 | ||
Thermal Shock Resistance | △T℃ | 200 | ||
Maximum Use Temperature | ℃ | 1600 | ||
Dielectric Strength | KV/mm | >12 | ||
Dielectric Constant | εr | 9-10 | ||
Dielectric Loss Angle (1MHz) | --- | 0.0002 | ||
Volume Resistivity | Ω.m | >1015 | ||
Specific Heat | J/(kg·k) | 0.78x103 | ||