炉用氮化硼陶瓷套筒
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炉用氮化硼陶瓷套筒
氮化硼陶瓷具有化学性质，具有比较好的导热性, 低热膨胀和微波透明度. 氮化硼 can be quickly machined as well. 而且, 玻璃, 盐和其余液态金属是不润湿的. 这确保了这些化合物都不会被弄湿, 而且它对化学攻击的免疫力要高得多。六方氮化硼 (六方氮化硼) 在高温条件下表现良好，在空气温度高达 900 摄氏度, 在真空中 1,900 摄氏度和惰性环境中 2,000 摄氏度. BN 也具有自润滑性,因此, 它不需要使用粘在层中的气体或水分子. 因为这, 在真空中, 这对于航空航天应用很重要, 氮化硼 (国阵) 可以完美工作.
特性
1. 高导热性
2. 良好的抗热震性
3. 低热膨胀
4. Exceptional heat resistance
5. Good chemical Inertness
6. High electrical resistance
7. High volume resistivity
8. Low dielectric constant and loss tangent
9. Excellent machinability
2. 良好的抗热震性
3. 低热膨胀
4. Exceptional heat resistance
5. Good chemical Inertness
6. High electrical resistance
7. High volume resistivity
8. Low dielectric constant and loss tangent
9. Excellent machinability
应用
1. Electronic parts – heat sinks, substrates, coil forms, prototypes
2. Vacuum melting crucibles
3. CVD crucibles
4. Microcircuit packaging
5. Sputtering targets
6. High precision sealing, brazing, and metallizing fixtures
7. Microwave tubes
8. Horizontal caster break rings
9. Low friction seals
10. Plasma arc insulators
11. High temperature furnace fixtures and supports
2. Vacuum melting crucibles
3. CVD crucibles
4. Microcircuit packaging
5. Sputtering targets
6. High precision sealing, brazing, and metallizing fixtures
7. Microwave tubes
8. Horizontal caster break rings
9. Low friction seals
10. Plasma arc insulators
11. High temperature furnace fixtures and supports
材料特性
Boron Nitride Properties: | ||
灰色和灰黑色 | (40-50)瓦/米·ķ | |
Thermal expansivity | (6.5-7.5)*10-6 °C | |
Resistivity | >1012 Ω·米 | |
Puncture voltage | (2.5-4.0)*106 /kv·米 | |
介电常数 | 3.8-4.3 | |
弯曲强度 | >35mpa | |
抗压强度 | >200mpa | |
密度 | 1.9—2.2 g/cm3 | |
工作温度 | Oxidizing Atmosphere | 850°C |
Vacuum and inertia | 2000°C | |
炉用氮化硼陶瓷套筒
