Heating and Sintering of Alumina using High-Power Pulsed 60-GHz Gyrotron(Physics, Process, Instruments & Measurements)
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概要
- 論文の詳細を見る
The fine focusing of millimeter-wave radiation from a high-power pulsed 60GHz gyrotron has been performed using a two-dimensional ellipso-parabolic focusing antenna system and the feasibility to achieve the power density of 100kW/cm^2 has been demonstrated. The focused beam profiles have shown excellent agreements with theoretical calculations. In the ceramics heating experiments performed with this focusing system, it has been demonstrated that the green body of alumina (5wt% SiC) can be heated to 1200℃ in 150s using millimeter-wave radiation with a 10-ms pulse duration fired at a frequency of 0.5Hz. Confinement of the incident radiation in the cavity has given an efficient ceramics heating. A preliminary sintering experiment resulted in densification of high-purity alumina from its green-body density of 54% theoretical density (TD) to>99% TD.
- 大阪大学の論文
著者
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MIYAKE Shoji
Osaka University
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SETSUHARA Yuichi
Osaka University
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Tabata Yuji
Osaka University
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OHNISHI Ryosuke
Osaka University
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