序号 | 项目 | 测试条件 | 单位 | 材料牌号 | ||||||||
A-95氧化铝 | A-75氧化铝 | 滑石瓷 | ||||||||||
1 | 体积密度 | 室温 | g/cm3 | ≥3.64 | ≥3.2 | ≥2.7 | ||||||
2 | 漏氦速率(气密性) | --- | pa.m3/s |
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--- | --- | ||||||
3 | 抗折强度 | 室温 | Mpa | 336.1 | 280 | 160 | ||||||
4 | 平均线膨胀系数 | (20~500)℃ | 1/℃ |
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(20~800) ℃ |
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5 | 介电常数 | 1 MHZ 20℃ | --- | 9.4 | 8.7 | 7.5 | ||||||
6 | 体积电阻率 | 100℃ | Ω.cm |
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300℃ |
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500℃ |
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--- | --- | |||||||||
7 | 介电损耗 | 20℃ |
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8 | 直流击穿强度 | --- | KV/mm | 42.0 | 34.0 | 28.0 | ||||||
9 | 热稳定性 | (室温~800)℃ | --- | 通过Pass | --- | --- | ||||||
10 | 化学稳定性 | 10%HCI | Mg | 4.657 | --- | --- | ||||||
1:9NaOH | 0.075 | --- | --- |