Study on aluminate of cathode emission active substances

Microwave tubes are used at the field of radar, electron counterwork and communication widely. The cathode is the heart of the microwave tube. The impregnated aluminate Ba-W cathode is used most widely. Along with the development of microwave technology, the high performance cathode is necessary with big current density, long life. The performance of cathode is decided by aluminate of cathode emission active substances. Forming method and sintering process are very important to the emission performance of aluminate. This paper studies the emission performance of aluminate forming method and sintering process.