Microwave Field Of Temperature Distribution In The Numerical Simulation Study

The topic of this paper originates from the research "The Research of Microwave Sintering PTC Semiconductor Ceramics (BaTi_1-x-yNb_xMn_yO₃) ", which is supported by the Yunnan Province Natural Science Foundation. This paper mainly analyzed the heating effects when microwave acts on materials and set up an electromagnetic-thermal model using the finite-difference time-domain method as the numerical tool. With this electromagnetic-thermal model the two-dimension temperature distributions of the material are showed.First, the difference equation, numerical stability condition, boundary condition, power sources settings and Yee computational methods were introduced briefly in the second section. Using F. Torres's parameter α, we give a new method which can improve the speed of simulation. Second, the thermal model and its boundary conditions were introduced in the third section. Combining the thermal model with the electromagnetic model, we establish a new model which is called the Electromagnetic-Thermal Model.Finally, we simulated the matters in the microwave field of the different power and the different frequency. With the microwave heating model that consists of the electromagnetic and thermal transport, the two-dimension temperature distributions are showed. The results and discussion are given in the paper. L. Ma and F. Torres simulated a matter and the load which was a phantom matter gel, but we only simulated the temperature distributions of the heated matter, so the results are better than ones of L. Ma and F. Torres. This method is a very important idea in the paper. In the sixth section we discussed the works which would be done in the future.