書誌事項
- タイトル別名
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- On the Vacuum Reduction of Niobium Pentoxide with Niobium Carbide
- サンカ ニオブ ノ タンカブツ カンゲン ニ ヨル ニオブ ノ セイレン ニ ツイテ
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Using the vacuum process, carbide reduction of niobium pentoxide due to the following reaction was investigated experimentally : Nb2O5+5NbC=7Nb+5CO. The mixing ratio of Nb2O5/NbC was varied from 33/67 to 45/55. By means of fluctuation measurements of pressure and temperature, it was clarified that the reaction began to proceed rapidly above 1700°C. Crude niobium metal, containing 96 to 97%Nb, was obtained easily by this process. The purification of crude niobium metal obtained above was examined in a series of vacuum refining experiments. Impurities, such as carbon, oxygen and nitrogen in niobium metal decreased at the refining temperature above 2150°C at the pressure of 10−5 mmHg. The removal of carbon during refining process was dependent on both temperature and oxygen content. Rapid removal of oxygen was observed in the presence of carbon. Cold-rolling was attempted on each specimen of refined metals, and fabricable specimens containing above 99.7%Nb showed the Vickers hardness lower than 200.
収録刊行物
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- 日本金属学会誌
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日本金属学会誌 26 (11), 695-699, 1962
公益社団法人 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
- 1390001206481121024
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- NII論文ID
- 130007332532
- 40018258033
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- NII書誌ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL書誌ID
- 9153473
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- データソース種別
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- JaLC
- NDL
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