Ceramic microwave drying characteristics
Ceramic microwave drying main features are as follows.
    (1) rapid and uniform drying microwave frequency higher depth of penetration into the infrared radiation can penetrate into the green body, water molecules or other substances are absorbed and transformed into heat in situ, no matter how complicated the shape of the body, rapid heating is uniform. This makes the body dehydrated quickly, stripping evenly. Deformation is small, easy to produce cattle cracks. On the other hand, the drying, the moisture evaporated from the surface of the consumption of energy, causing the table to a temperature just below body Jiao internal temperature (because of evaporative cooling), the internal body heat generated by the absorption of the microwaves, that the internal steam rapidly emergence, formation pressure gradient, heat transfer and mass transfer in this direction - caused, is conducive to internal diffusion. Speed ​​up the drying speed. Microwave drying and convection drying, compared to increasing the drying rate, shorten the drying time 2-2.5 times. In addition, the microwave drying is from the inside out, the bad body as a whole, the inner layer is first dried, so that it will not form a crust on the surface. Hinder the relocation of internal moisture.
    (2) selective In - the frequency of the microwave field, the only microwave absorbing material in order to be microwave heated, the water due to its dielectric loss than the other substances person who the heat absorption of water, the internal water can be heated quickly and directly evaporated. In this way, the ceramic body can in a very short time and is heated mold. For those who wish to overheating of the material is small, the use of microwave drying has more advantages. As long as proper control, the entire field of the body does not overheat.
    (3) high thermal efficiency, the heat energy loss in the surrounding medium, rarely, with the microwave heating cavity itself does not absorb microwave, full effect on the body, the microwave energy is almost completely absorbed by the water in the body, little heat loss , high thermal efficiency, so you can save energy.
    (4) response, and easily controlled by adjusting the microwave output power can be changed instantaneously heated, so easy to realize automation. No inert heating microwave drying, microwave transmission stops, the heating is stopped immediately.
    (5) drying the products of high quality as the microwave heating, the external uniform. This avoids products due to local overheating and damage. Meanwhile, the selective heating of the water of microwave drying can be carried out at lower temperatures, which can also prevent product overheating.
    (6) microwave radiation harmful to close the microwave drying equipment for protection, you can use the microwave reflection characteristics of the metal, using a thin metal plate or metal plate openings to prevent microwave leakage.
Because of these characteristics of microwave, microwave drying ceramic been hinge for a wide range of research involving daily purchase porcelain, porcelain, ceramics and other porous materials dry.

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