Standing wave-moving and sample-rotating effect of microwave heating on ceramic in a single-model cavity

Abstract

This study designs a metal surface movable-microwave heating cavity with a turntable to choose an efficient and uniform microwave heating method according to the shape of the ceramic. The movement of the metal surface affects the standing wave in the cavity, causing the electric field in the cavity to change constantly during heating due to the rotating turntable and metal surface motion. This results in the absorption mode of ceramic is not constant. However, it is challenging to mesh the dynamic position of ceramic; therefore, this study proposes a transform optics method to simulate the rotating motion of the turntable and the moving motion of the metal surface. Experiments verify the correctness of the simulation model. The heating effects of fixed heating, turntable rotating and metal surface moving are compared. Finally, the effects of microwave heating on ceramics at different speeds and moving rates are discussed.