1. Material:95% alumina ceramic
| Performance | ||||
| Item | Index | Unit | Steatite ceramic | 95 Al2O3 |
| Physical Characteristics | Bulk density | g/cm3 | 2.7 | 3.6 |
| Water absorption | % | 0 | 0 | |
Mechanical Characteristics | Flexural strength | Mpa | 145 | 320 |
| Hardness Vickers | Gpa | 5.7 | 12.2 | |
| Elastic modulus | Gpa | 120 | 280 | |
| Poisson's ratio | - | 0.21 | 0.22 | |
| Thermal Characteristics | Linear expansion coefficient | 20-5000C 10-6/0C | 7.9 | 7.1 |
| Thermal conductivity | w/(m.k) | 2.5 | 16 | |
| Specific Heat | *10-3J/(kg*K) | 0.75 | 0.78 | |
| Electrical Characteristics | Dielectric constant(1MHZ) | - | 6.2 | 9 |
| Dielectric loss angle | *10-4 | 18 | 15 | |
| Dielectric strength | *106V/m | 18 | 12 | |
2. Advantages
1).High resistivity
2).High strength
3).Excellent electrical properties
4).Poor heat conductivity (Thermal insulator).
5).Good resistance to thermal shock.
6).Low coefficient of thermal expansion.
7).Good mechanical stability.
3. Applications:
1).Heating element holders
2).Interlocking Insulating Beads&Pins
3).Lamp bases and caps
4).Thermostat part
Ceramic beads are commonly used in many applications, for example in power electronics components placed under extreme load, electrical drive engineering and electrical engineering as well as in electronic components for computer technology, such as: Feed-through insulators, Headers, High-power receptacles, Insulating discs, Insulator rings and cylinders, Precipitator products, Power switches,Traveling wave tubes, Vacuum interrupters, Windows, Power grid tubes, X-ray tubes, Triggered spark gaps, Thyristor housings and diode housings, Current feedthroughs, Diffusion pumps, Transmission tubes, Insulators, Integrated circuits.