Performance of an Oxide Cathode Prepared From Submicrometer Carbonates
Performance of an Oxide Cathode Prepared From Submicrometer Carbonates
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DOI：
10.1109/ted.2011.2158648
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发表时间：
2011-09-01
影响因子：
3.1
通讯作者：
Li, Yun
中科院分区：
文献类型：
--
作者：
Wang, Xiaoxia;Liao, Xianheng;Li, Yun
我们研究了由亚微米丝状三元碳酸盐制备的氧化物阴极的性质，包括直流（dc）和脉冲电流（PC）发射，蒸发速率和寿命。制造并测试了20个阴极。测试结果表明，在100 μ s脉宽和1%占空比下，在800 ℃以上，直流发射电流密度大于5.0A/cm ~ 2;在850 ℃，光子晶体发射电流密度大于19.9A/cm ~ 2。蒸发速率为2.09 × 10 ~（-9）g。cm（-2）。s（-1），如使用石英晶体振荡方法测量的。所证明的最差情况寿命（超过5个装置）为5000 h，800 ℃时为2.1 A/cm（2）。
We investigate the properties of oxide cathodes prepared from submicrometer filamentous triple carbonates, including the direct-current (dc) and pulsed-current (PC) emission, evaporation rate, and lifetime. Twenty cathodes were manufactured and tested. The testing results show that the dc emission current density is over 5.0 A/cm(2) beyond 800 degrees Cbr and the PC emission current density is over 19.9 A/cm(2) for a 100-mu s pulsewidth and 1% duty cycle at 850 degrees Cbr. The evaporation rate is 2.09 x 10(-9) g . cm(-2) . s(-1) at 850 degrees Cbr as measured using a quartz crystal oscillating method. The demonstrated worst case lifetime (over five units) is 5000 h with 2.1 A/cm(2) at 800 degrees C.