熔盐电化学合成NbC-Sn复合粉末
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| Published in | 中国有色金属学报：英文版 Vol. 27; no. 10; pp. 2310 - 2316 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
2017
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| Subjects | |
| Online Access | Get full text |
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| Bibliography: | 43-1239/TG NbC-Sn; electrochemical reduction; molten chloride; calcium niobates; acid leaching NbC-Sn composite powder was successfully prepared from SnO2,Nb2O5and carbon by electrochemical reduction andcarbonization in CaCl2-NaCl molten salt at900°C.The reaction pathway was investigated by terminating electrochemicalexperiments for various durations.The influence of carbon on the final products was considered.NbC particles were obtained byleaching the composite with acid.The results showed that the aggregated NbC-Sn composite powdev contained NbC particles about50-100nm and Sn particles about200nm.SnO2was reduced to Sn in the sintering process.Nb2O5was electrochemically reduced toNb in molten salt,experiencing some intermediate products of calcium niobates and niobium suboxides.Nb metal obtained wasconverted to NbC with assistance of carbon.The reduction of Nb oxides may be incomplete and Nb3Sn would be formed if carbon isinsufficient in the cathodic pellet.NbC with good dispersity is produced by leaching NbC-Sn with HCl. |
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| ISSN: | 1003-6326 |