| 溶胶凝胶法合成La_(0.7)Sr_(0.3)Fe_(0.8)Co_(0.2)O_3影响因素的研究 |
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| 引用本文： | 薛纪溥,;高文元. 溶胶凝胶法合成La_(0.7)Sr_(0.3)Fe_(0.8)Co_(0.2)O_3影响因素的研究[J]. 中国陶瓷工业, 2014, 0(3): 14-17 |
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| 作者姓名： | 薛纪溥, 高文元 |
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| 作者单位： | [1]沈阳高精数控技术有限公司,辽宁沈阳110000; [2]大连工业大学纺织与材料工程学院,辽宁大连116034 |
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| 摘 要： | 以合成中温固体氧化物燃料电池阴极La0.7Sr0.3Fe0.8Co0.2O3(LSFC)粉体为研究对象,探讨了PVA改进的溶胶凝胶法合成粉体的影响因素,获得最优实验条件。当pH值=7,柠檬酸与金属离子摩尔比为1.6∶1;PVA与硝酸盐质量比为1∶4时,能够形成形态良好且透明澄清的溶胶,再经12 h的陈化形成凝胶,然后在155℃烘箱中使凝胶膨化制得LSFC前驱体。LSFC前躯体在900℃煅烧2 h后形成晶体结构稳定、粒径分布均匀、具有单一钙钛矿结构的粉体。
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| 关 键 词： | 溶胶凝胶法 粉体 阴极材料 钙钛矿结构 |
Factors Inlfuencing the Synthesis of La0.7Sr0.3Fe0.8Co0.2O3 by Sol-gel Method |
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| Affiliation: | XUE Jipu, GAO Wenyuan (1. Shenyang Golding CNC Technology Co., Ltd., Shenyang, 110000, Liaoning, China; 2. School of Textile and Material Engineering, Dalian Polytechnic University, Dalian, 116034, Liaoning, China) |
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| Abstract: | In this study, La0.7Sr0.3Fe0.8Co0.2O3（LSFC）powder was synthesized as the intermediate-temperature solid oxide fuel cell cathode material. The factors influencing the PVA-modified powder synthesized by sol-gel method were analyzed, and the optimal experimental conditions were determined： when pH=7, the mass ratio of the PVA to nitrate was 1：4, and the molar ratio of citric acid to metal ion was 1.6：1, good transparent sol could be obtained. The sol was gelatinized after 12 h aging, and turned into LSFC precursors after being treated at 155℃in an oven. The LSFC precursors formed the powders with the single and stable perovskite structure and good particle size distribution after being calcined at 900℃ for 2 h. |
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| Keywords: | sol-gel method powder cathode materials perovskite structure |
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