Hydrogen Reduction of Germanium Dioxide under High Pressure

この論文をさがす

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

被引用文献 (1)*注記

もっと見る

参考文献 (3)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ