中文摘要：

采用FDTD方法，利用C语言编写电磁场和温度场耦合程序，对微波单模腔中加热的Fe3O4的电磁场、温度场的变化进行数值模拟．结果显示，在Fe3O4微波加热过程中，电场强度逐渐减小，而磁场强度逐渐增大；磁损耗功率远大于电损耗功率，因此总的损耗功率和磁损耗功率随时间的变化趋势一致，说明在Fe3O4微波加热过程中磁损耗起主要作用；而Fe3O4微波加热升温的模拟值与实验值的变化趋势相符。

英文摘要：

The numerical simulation of microwave heating for Fe3 O4 in single-mode cavity was carried out by FDTD method; and the programme of the eoupled electromagnetic fields and temperature fields was writen using C language. The results showed that electric field intensity was decreased while the magnetic field intensity increased gradually during microwave heating of Fe3 O4 ; the power of magnetic loss is far greater than the power of electric loss, so the change of total power loss with time followed the same trend as the changes of magnetic power loss, therefore magnetic loss on heating plays an important role in the process of microwave heating for Fe3O4 ; and the simulation values of temperature rising trend of microwave heating for Fe3 O4 agreed with the experimental values.