微波烧结腔电磁场及温度场仿真研究

Simulation of Electromagnetic Field and Temperature Field in Microwave Sintering Cavity

微波加热作为一种新兴的加热方法,有传统加热无法比拟的优势,被广泛应用于烧结材料等多个领域。但由于微波对烧结物料的作用机理,尤其对微波加热过程的动态仿真和优化设计的系统研究尚不明确,限制了微波烧结技术在更大范围内的推广应用。文章通过对微波谐振腔的仿真研究,计算出高温层和保温层物料在微波谐振腔内的电磁场和温度场分布,分析了物料及高温层、保温层在微波加热过程中温度以及电磁场的动态变化情况,不同烧结位置对微波加热效率及均匀性的影响。通过掌握微波烧结腔中的场分布情况,分析并找出合适的样品烧结位置,取得了更好的烧结效果。

As a new heating method,microwave heating is widely used in many fields including material sintering because of its incomparable advantages over traditional heating methods.However,the mechanism of microwave action on sintered materials is still unclear,and there is no sufficient systematic research on dynamic simulation and optimal design of microwave heating process,which limits the popularization and application of microwave sintering technology in a wider range.Therefore,the distribution of electromagnetic field and temperature field of the high temperature layer,insulation layer and material in the microwave resonator are simulated,the dynamic changes of temperature and electromagnetic field of the material,high temperature layer and insulation layer in the microwave heating process are analyzed,and the effects of different sintering positions on microwave heating efficiency and uniformity are studied.By mastering the field distribution in the microwave sintering cavity,the suitable sintering position of the sample is found,and good sintering effect is obtained.