Microwave Technology
    Microwave technology in the 20th century was developed a new technology. It was first used in communications , as a source of energy for heating, drying , treatment is only developed in recent years , and in foreign countries has been widely popularized. The so-called microwave heating , a dielectric material absorbs microwave energy and convert it to heat. The principle of microwave heating then what is it? We know that many dielectric materials exist in a polar molecules ( i.e. positively charged end , one end of the negatively charged molecule or dipole ) , the microwave electric field , the original extremely disorganized molecules on the role of high-frequency fields with fast swing , the molecular to the high-frequency field with changing the direction of the molecular arrangement will surely be overcome existing heating operation and the role of molecular mutual interference and obstruction , resulting in similar friction the role of the thermal motion of molecules clutter and get energy manifested in the form of heat , the medium temperature will rise. This is the principle of microwave heating of one of the most popular explanation , that the actual process is more complicated .
Microwave heating can material , but not all of the materials can be heated by microwaves . Such as copper , iron, aluminum , silver and one of a metal , microwave role in their surface as the light reflected from the mirror , almost completely absorb microwave energy ; PTFE insulator , such as polyethylene , polypropylene , etc., on their microwave as the sun light to the surface of the glass , as reflecting a part , transmission part , also absorbs part, but rarely absorb microwave energy , can be ignored. Only the dielectric material, the surface of microwave , it absorbs microwave energy can not be ignored . Are different degrees of microwave energy absorbing medium , is called lossy media. Especially water and fat-containing materials , to varying degrees, they absorb energy and convert it to heat. If the conductors and insulators suitable for promotion Far infrared heating technology to facilitate energy saving, then the media should be widely promoted by microwave heating to facilitate energy saving .