Microwave heatable material is divided into three categories:、
(1) transparent type, mainly low-loss insulator, such as most of the polymer materials and some non-metallic materials, the microwave can partially reflective and partially penetrate, absorb little microwave, these materials may be long in the microwave field, hair minimal heat, often used as a heating chamber through waves of material, such as tetrafluoroethylene, etc. can be used through the waves separator vacuum microwave cavity.
(2) total reflection, good conductive properties are primarily metallic materials which the microwave reflection coefficient close to 1, only a very small amount of penetration of incident microwave energy, the microwave heating apparatus has been used as a waveguide, the microwave cavity , blender and the like;
(3) the absorption type, mainly because some dielectric material interposed between the metal and the insulator comprising textile fiber materials, paper, wood, silicon carbide, zirconia, phosphor, ceramics, water, paraffin and the like, application Object microwave sintering technology mainly ceramic material and metal powder materials.
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