Study on the Wave-transparent Property of Mullite Refractory Layer in Microwave Heating

In order to research the effects of microwave frequency,temperature and the thickness on the transmission performance of mullite refractory layer,a computer simulation was carried out according to the electromagnetic wave transmission.The calculation results well display the relationships among the values of thickness of the mullite ceramic,temperature,frequency and microwave transmission performance.The preferred thickness was also investigated and discussed.It is indicated that a series of transmission peaks has appeared with the thickness increases,and transmission peaks decrease exponentially.The transmission peak moves to low thickness with the increasing temperature.The mullite ceramic present an excellent transmission performance with the thickness of 0.025m,0.045m,0.07mat 915MHz.