ミリ波照射による大気中でのFe_2O_3の還元反応

概要

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24GHz Millimeter Wave oscillated by Gyrotron system was radiated to Fe2O3 Powder in atmospheric air. The samples were heated at 1000°C, 1100°C and 1200°C by millimeter wave. The elevating temperature rate was controlled at 10°C/min and 30°C/min. While the temperature was elevating, the temperature of sample raised suddenly at about 550°C. It seemed that Fe2O3 was changed to be a very high dielectric loss material. The lattice constant of all samples became shorter than the lattice constant of raw materials, after heating by millimeter wave radiation. This indicates oxygen goes out of Fe2O3. In other words, the samples are deoxidized by millimeter wave, even in atmospheric air. The lattice constants of samples which were heated on elevating temperature a rate of 30°C/min were shorter than those of sample heated at 10°C/min. Therefore, it seemed higher electric field accelerated the deoxidization. When the focused millimeter wave was radiated to the sample, the oxygen composition was reduced from 58.1at% to 37.8at%. Fe2O3 was deoxidized strongly by strong electric field of millimeter wave.
社団法人粉体粉末冶金協会の論文
2007-08-15