多模谐振腔中的微波加热仿真与实验研究  

Simulation and Experimental Study on Microwave Heating in a Multi-mode Resonant Cavity

作　　者：冯彤[1,2] 高冬平[1] 丁海兵[1] 张兆传[1] 

机构地区：[1]中国科学院电子学研究所高功率微波源与技术重点实验室,北京101407 [2]中国科学院大学,北京100049

出　　处：《真空电子技术》2016年第4期47-50,共4页Vacuum Electronics

基　　金：国家重点基础研究发展计划(973计划)(2013CB328901)

摘　　要：本文对一种树脂复合材料在多模谐振腔中进行微波加热,使用COMSOL Multiphysics软件对反应过程涉及到的电磁场和温度场进行耦合分析,将仿真结果与实验结果对比发现,物料内部的某些位置出现"热点",这种温度分布的不均匀性使局部应力过大导致物料断裂;物料内部的化学反应在微波辐照下速率加快,使物料的介电特性发生改变,从而引起温度发生变化。A resin composite material is heated in a multi-mode cavity by micrpwave, and coupling a nalysis involves temperature and electromagnetic field of this process is completed by COMSOL multi-physics software. Comparing the simulation results with the experiments, we find that some ＂hot spots＂ are inside the material, and large local stress caused by those uneven temperature distribution leads to ma terial fracture. Under microwave irradiation, chemical reactions in material are accelerated, which gives rise to the change of the dielectric properties as well as the temperature of the material.

关 键 词：微波加热 多模谐振腔 温度 “热点” 

分 类 号：TN924[电子电信—通信与信息系统]