Alumina ceramics, which have high dielectric resistance characteristics, are widely used in high-voltage devices.
Kyocera has developed the new material AH100A with improved creeping dielectric resistance performance.
AH100A has 1.6 times higher creeping dielectric resistance and 1.2 times higher penetration dielectric resistance compared to conventional ceramics. This makes it possible to reduce high-voltage conditioning time and miniaturize terminals.
Creeping dielectric resistance distance: 2 mm
Measurement atmosphere: 10 Pa or less
Other measurement conditions of Kyocera
2mm thickness
Other measurement conditions of Kyocera
Pressure: 10-3 Pa or less
Boost Voltage: 1kV/min.
When flashover occurs, the voltage rises again from 0 volts
Material Material Code |
High Voltage-resistant Alumina Ceramics | (Conventional) Alumina | |||
---|---|---|---|---|---|
AH100A | AO479O | ||||
Electrical Characteristics | Attained Electric Field Strength | MV/m | 14.1(ave.) | 8.4(ave.) | |
Penetration Dielectric Resistance | MV/m | 24 | 19 | ||
Volume Resistivity | 20℃ | Ω・cm | ≧1014 | >1014 | |
Dielectric Constant (1MHz) | - | 10.2 | 9.9 | ||
Dielectric Loss Angle (1MHz) | (x 10-4) | <1 | 2 | ||
Mechanical Characteristics | Flexural Strength (3-point Bending) | MPa | 330 | 310 | |
Young's Modulus of Elasticity | GPa | 380 | 360 | ||
Poisson's Ratio | - | 0.25 | 0.23 | ||
Fracture Toughness (SEPB) | MPa・m1/2 | 5 | 3~4 | ||
Thermal Characteristics | Thermal Conductivity | 20℃ | W/(m・K) | 24 | 29 |
Coefficient of Linear Thermal Expansion (RT-800℃) | × 10-6/K | 8.2 | 8.0 |
Values are based on typical material properties and
may vary according to product configuration and manufacturing process.