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本文提出了用做阴极活性物质的钨酸钡锶的制造新工艺——湿氢活性烧结法;采用一次浸渍成型制造阴极的工艺流程;对阴极制造的关键工序(浸渍烧结)做了较深入的探讨。现在已能较稳定的制出1000℃亮度温度具有直流偏离点电流大于8安培/厘米~2发射水平的阴极。在阴极温度900℃亮度温度时,支取直流发射2安培/厘米~2的阴极寿命试验持续了3000小时以上。但大电流密度下的寿命试验结果不佳,有待进一步探讨。
In this paper, a new process for the production of barium strontium tungstate, which is used as a cathode active material, is proposed. The process of wet hydrogen activation sintering, the process of making cathode by one immersion molding, the process of impregnation sintering Discussion. Now it has been possible to produce a cathode with a DC bias current greater than 8 A / cm ~ 2 at a brightness of 1000 ° C. At a cathode temperature of 900 ° C brightness temperature, a cathodic lifetime test of 2 Amps / cm 2 withdrawn DC emission lasted for more than 3000 hours. However, the test results of life at high current density are not satisfactory and need to be further explored.