Derivation of the microwave heating rate equation
    Although a variety of substances in the microwave field heating rates there are differences , but the heating curve is extremely similar to that of the sample temperature endothermic process is divided into two stages. The initial phase of rapid heating process for the material , the material for this process is the most important stage of the endothermic heat , smoke was rising temperature of the material in a short time to a higher temperature. After the material set temperature becomes slow or even completely not rise , this time , the material in the temperature of the microwave field reaches a maximum temperature rise of the material in this stage is called the second phase ;
    Heat transfer by Fourier 's law, the size of the heat flux is proportional to temperature , but in opposite directions .
    The purpose is to require the work of microwave rapid heating time is extremely short , and therefore the material of the heat lost to the environment is small. Meanwhile, for the pure mineral , because microwave radiation is more comprehensive , both inside and outside the heating can be considered uniform temperature distribution within the material ; mineral materials for non- single , high-power microwave irradiation in small , sometimes only by heating - seconds meet the requirements, so you can ignore the heat transfer between them .