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众所周知,氧化铝涂层内含杂质多、涂层龟裂、受到严重污染,都会降低涂层的绝缘性能。对于绝缘性能要求较高的电子管,氧化铝涂层绝缘性能差会引起灯丝与阴极间漏电、击穿、短路,使电子管早期失效。以前电子管普遍使用的氧化铝标准,其杂质只控制Fe_2O_3、SiO_2、Na_2O、Cl~-。对于灯丝与阴极间绝缘性能要求较高的电子管来说,很难满足要求。本文针对上述存在的问题进行
As we all know, the alumina coating contains more impurities, cracked coating, severely contaminated, will reduce the coating’s insulation properties. For the tube insulation of the higher requirements of the tube, poor insulation coating alumina will cause leakage between the filament and the cathode, breakdown, short circuit, the early failure of the tube. Previous tubes commonly used alumina standards, the impurities only control Fe_2O_3, SiO_2, Na_2O, Cl ~ -. For the filament and cathode insulation between the higher requirements of the tube, it is difficult to meet the requirements. This article addresses the above problems