Microwave heating Fundamentals
Microwave heating effect can be polar molecules under the action of an external electric field to explain the rapid rotation . In a microwave device, battery via a reversing switch and the capacitor plates connected to a glass of water between the plates . When the switch is closed, the electric field generated between two plates role of the cup of water molecules tend to positively charged hydrogen-terminated capacitor anode , and to end with a negatively charged oxygen tends to a positive electrode, which makes water molecules in the electric field direction rules arranged . If the direction switch is in the opposite direction , also with the arrangement of water molecules
The steering . If rapid conversion constantly switching direction , the direction of the applied field is rapidly transformed , resulting in water molecules swing direction changing , because the thermal motion of the molecule itself and the interaction between adjacent molecules , the water molecules with the electric field and swinging the rules has been hampered and destruction , molecular movement in a mixed condition, the output similar to the effects of friction , exacerbated by the generation of heat , so that the water temperature increases . The higher the frequency of the applied electric field , the faster swing polar molecules , the more heat generated by the electric field is stronger, the greater the amplitude of oscillation elements , the greater the heat generated .
    Between the plates of the capacitor , if it is not put in water, but other substances , in the same conditions, the heat generated is different. Microwave heating by the microwave generator is the same principle of an alternating electric field . Microwave frequency is UHF , such as 915000000Hz,, 2450000000Hz , etc., so within one second rapid changes so fast swing polar molecule , rapidly produce large amount of heat can be imagined .