マイクロ波加熱によるセラミックスの昇温挙動

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Microwaves are electromagnetic waves that have the frequency range of 0.3 to 300 GHz and corresponding to wavelengths ranging 1 m to 1 mm. Microwave heating is fundamentally different from conventional heating. In this process, the dielectric materials are heated internally instead of originating from external heating sources. Therefore, in this report the effect of adding alumina powder to the microwave heater powder was investigated through the behaviors of the heating the mixture of them to search the microwave heater to be precisely able to control the temperature. We made two kinds of heater specimens from these powders, which have plate and pellet type shapes. These specimens were irradiated by 2.45 GHz microwave in the oven or the applied equipment. The specimen's temperatures were measured by emission pyrometer. The results obtained are as follows. After heating, the temperature of the specimen irradiated by microwave achieved the steady level. Its temperature showed that the larger the volume is, the higher the temperature is under the condition that the mixture heater included the same ratio of alumina. The steady achieved temperature of mixture heater is lower with increase of the added amount of alumina. However, the heater with low temperature coefficient related with linear were founded in the wide range composition between heater material and alumina. Therefore, using these materials, we are able to precisely control the temperature.
2004-02-10

マイクロ波加熱によるセラミックスの昇温挙動

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