glazed ceramic insulator
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Ceramic arc extinguishing grid plate
Ceramic arc extinguishing grid plates are a type of engineering ceramics used in electrical power systems for the purpose of extinguishing electrical arcs. These plates are specifically designed to withstand high temperatures and electrical stresses, making them ideal for applications in which arc suppression is required.
Advanced Ceramics arc extinguishing grid plates are made from advanced ceramic materials that possess excellent thermal and electrical ceramics insulation properties. These ceramics are typically composed of a combination of metal oxides, such as alumina (Al2O3), zirconia (ZrO2), and silica (SiO2), which provide high mechanical strength and resistance to thermal shocks.
In mechanical engineering, these ceramic grid plates are commonly used in circuit breakers and switchgear systems to control and extinguish electrical arcs that occur during the interruption of high voltage currents. When an electrical arc is generated, the ceramic grid plate acts as a barrier, preventing the arc from spreading and causing damage to the surrounding components.
The unique properties of engineering ceramics, such as their high melting point, low thermal expansion coefficient, and excellent electrical insulation, make them highly effective in extinguishing electrical arcs. The ceramic grid plates are designed with a specific pattern of holes or slots, which allows for the controlled dissipation of heat and energy from the arc, leading to its extinguishment.
These ceramic materials used in arc extinguishing grid plates offer numerous advantages over traditional materials, such as metal. They have superior thermal and electrical insulation properties, excellent mechanical strength, and a longer lifespan. Additionally, ceramics are more resistant to corrosion, wear, and erosion, ensuring the longevity and reliability of the grid plates in demanding electrical environments.
Technical Parameters:
| Item | Unit | Al2O3 95％－97％ | Al2O3 99％ |
| Desity | g/cm3 | 3.7 | 3.85 |
| Flexural Strength | Mpa | 300 | 340 |
| Compressive Strength | Mpa | 3400 | 3600 |
| Modulus of Elaslicity | Gpa | 350 | 380 |
| Impact Resistance | Mpa m1/2 | 4.0 | 5 |
| Weibull Moudulus | m | 10.0 | 10 |
| Vickers Hardness | HV0.5 | 1200.0 | 1300 |
| Thermal Expansion Coefficent | 10-6K-1 | 5.0-8.3 | 5.4-8.3 |
| Thermal Conductivity | W/mK | 24 | 27 |
| Thermal Shork Resistance | △T℃ | 250 | 270 |
| Maximum Use Temperature | ℃ | 1600 | 1650 |
| Volume Resistivity at 20℃ | Ω | ≥1014 | ≥1014 |
| Dielectric Constant | KV/mm | 20 | 25 |
| Open Porosity | % | 0 | 0 |
| Dielectric Constant | ξr | 10 | 10 |
| Dielectric Loss Angle | Tanσ | 0.001 | 0.001 |
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