Method and device for quickly heating Al2O3

The invention relates to a method and a device for quickly heating Al2O3. Al2O3 is a weak microwave-absorbing material, the heating rate of Al2O3 is low by adopting a direct microwave heating method and device when the temperature is less than 800 DEG C, Al2O3 easily absorbs microwave and can be directly heated with microwave when the temperature is more than 800 DEG C, and according to the characteristic of Al2O3, the method and the device have the characteristics that an auxiliary electric field generating circuit and an intelligent temperature control circuit are adopted, the auxiliary electric field generating circuit consists of an auxiliary electric field control circuit and positive and negative metal electrode plates, and the intelligent temperature control circuit consists of a temperature measuring device and an intelligent switch. The auxiliary electric field generating circuit generates an auxiliary electric field in a microwave energy applicator to achieve the effect of polarizing Al2O3 molecules; the electric dipole moment of the polarized Al2O3 molecules is increased, so that the Al2O3 molecules can be quickly heated by microwave generated by a microwave generator; the temperature measuring device monitors the temperature of Al2O3 in the microwave energy applicator in real time; and when the temperature is more than 800 DEG C, the intelligent switch automatically turns off the auxiliary electric field. The method and the device, which can be used for directly and quickly heating Al2O3, are energy-saving and environment-friendly.