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- Hasegawa Ryosuke
- National Research Institute for Metals
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- Kurosawa Toshio
- National Research Institute for Metals
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- Yagihashi Tetsuo
- National Research Institute for Metals
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説明
Reduction of germanium dioxide under high pressure of hydrogen up to 20 atm was studied in the temperature range of 450∼600°C. The reduction rate was measured by means of a high-pressure type thermobalance using a quartz spring.<BR>With the increment of pressure, the reduction increased rapidly, and the induction and the complete reduction time were shortened. The effects of pressure were most remarkable within several atmospheric pressures. The initiation temperature of this reduction was 450°C and was almost independent of pressure. No difference was found in the comparison test between closed and flowing systems at 500°C and 550°C at 15 atm. The sublimation loss of germanium due to germanium monoxide was reduced remarkably at 800°C under high pressure. Furthermore, the structure of the reduced metal was found to be very porous under a scanning electron microscope.<BR>The reduction rate of the main reaction period from about 10 to 90 % was fit for the equation of {1−(1−R)1⁄3}=Kt, and the relation between reduction rate and hydrogen pressure could be represented by the Langumuir’s type formula K=aPH<SUB>2</SUB>⁄(1+bPH<SUB>2</SUB>).<BR>Experimental results were discussed on the basis of absolute reaction rate theory and some kinetic values were also evaluated.
収録刊行物
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- Transactions of the Japan Institute of Metals
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Transactions of the Japan Institute of Metals 13 (4), 272-277, 1972
社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001205116933888
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- NII論文ID
- 130003485158
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- ISSN
- 24324701
- 00214434
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可