The paper describes the explosion electron emission resulted from microwave radiation field in microwave tube, including the analysis of alternating field-emission and the temperature distribution on the whisker. The deduced equation provides the heating speed of the whisker, besides the relation of produced plasma intensity with amplitude of microwave, electric conductivity, thermal conductivity, mass density and specific heat capacity. When the time is much longer than the period of microwave, the whisker temperature increases linearly with time. The rise ratio of the temperature can reach 3. 22 × 1010℃/s, and the whisker may gasify and form plasma in a timescale of hundred nanoseconds.%对微波射频场在微波管内引起的场致发射和爆炸电子发射及等离子体的产生进行了分析,推导了等离子体产生强度与微波振幅、材料的电阻率、热传导系数、质量密度和比热容之间的关系,得到了晶须温度分布的表达式,通过数值解析的方式总结出在远大于微波周期的时间尺度上晶须温度提高随时间线性上升.在模型所述材料特性下,温度的上升率达到了3.22×1010℃/s,在100 ns量级就可以使晶须发生气化形成等离子体.
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