RAPID HEATING BY SINGLE-MODE CAVITY CONTROLLED AT 6GHZ

The single-mode cavity is possible to concentrate the microwave energy, and so even the ceramics having extremely small loss factor e″ can be rapidly heated up to high temperature. But, it is difficult to control the resonant state of the cavity. Therefore, the control of the coupling window (iris) and the short circuit plate (plunger) becomes necessary to maintain the resonance of the cavity. In this paper, the fundamental concept of resonant control in the cavity at 6GHz band is described. Furthermore, the microwave heating of ceramics was done with the developed cavity and heating control system, and it is reported about various applications to rapid heating.