In order to study the effect of probe structure on the microwave ignition performance,four probes were used to test the microwave ignition delay time of Ti/CuO ignition powder and the probe structure was optimized by simulation.The influ-ence of the probe parameters(length,coating thickness,tip taper,and coating thickness)on the electric field intensity was obtained.The results show that the electric field intensity of the probe tip significantly affects the ignition delay time.Under 2.45 GHz and 50 W microwave,the maximum electric fields of the four probe tip are 1 800,190,34,and53kV/m,respec-tively.The ignition delay time of Ti/CuO are 222.6,660.5,949.1,and 921.3 ms,respectively.When the probe length is 26mm,under 2.45GHz and 50W microwave,the PTFE dielectric layer length is 8mm and the thickness is 0.75mm,the tip taper is 0.243 and the gold coating thickness is 5 μm,the electric field intensity can be increased from the original of about 10kV/m to about 1 000kV/m and the electric field distribution is concentrated at the tip.
microwave ignitionprobeignition powderignition delay timeelectric field intensityignition device
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