The microwave and materials
    Microwave radiation is non- ionizing radiation. When different materials encountered in the microwave transmission , will produce reflection, absorption and transmission through , depending on the material itself, several key features: the dielectric constant , dielectric loss tangent , heat capacity , shape and moisture content .
    In the microwave processing system, commonly used materials can be divided conductors, insulators , and other types of media . Most good conductor , such as feeding, silver, aluminum or the like metal capable of reflecting the microwave , so the microwave system , the conductor is used in a special form of communication and the reflected microwave energy. The microwave waveguide apparatus used , the microwave heating apparatus of the shell , usually made of aluminum, brass and other metallic materials.
    Insulation can be partially reflective or through microwave , usually it absorbs microwave energy is less , the majority through the microwave , the microwave processing of food packaging or insulating material used for household appliances microwave ovens food . Common materials include glass, ceramics , teflon , polypropylene and other plastics .
    A dielectric material known as a dielectric material between the conductor and the insulator between its performance . It has an absorption , penetration and reflection of microwave performance. In the microwave heating process. The dielectric material to be treated in different degree of absorption of microwave energy , so-called lossy medium. In particular, water , salt and fat foods and other substances ( including biomass ) fall into a lossy medium , at different levels of the microwave field can absorb microwave energy and convert it into heat.
    And the magnetic polar compounds are generally the performance of such materials is very much like a dielectric material is reflected by the microwave absorption and c should be noted that since the energy of microwave energy having a polarity and a dielectric material , magnetic material and the influence of an electric field field , many polar compounds , with the dielectric material as a magnetic material , it is easy for the microwave processing of materials .