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OALib Journal期刊
ISSN: 2333-9721
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聚合物前驱体法合成la0.6sr0.4co0.2fe0.8o3-δ纳米粉体
DOI: doi:10.3969/j.issn.1671-7627.2012.02.008, PP. 35-38
Keywords: 钙钛矿,纳米粉体,溶胶凝胶,聚合物前驱体法
Abstract:
采用聚合物前驱体法，以硝酸盐为原料，乙二醇为溶剂，甘氨酸为螯合剂制备la？0.6sr0.4co0.2fe0.8o3-δ前驱体溶胶及其纳米粉体，考察甘氨酸用量、溶胶蒸发温度及时间对溶胶稳定性的影响。结果表明：当甘氨酸和总金属离子物质的量之比为1∶1时，65℃蒸发48h可得到均匀、稳定的前驱体溶胶；所得凝胶在700℃下烧结5h可得到平均粒径为54.4nm的纯钙钛矿型粉体。
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