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材料研究学报  2001, Vol. 15 Issue (5): 593-598    
  论文 本期目录 | 过刊浏览 |
纳米γ-Fe2O3的合成及气敏性能
牛新书1; 徐荭1;徐甲强2
1河南师范大学环境科学与工程重点学科开放实验室 2郑州轻工业学院
引用本文:

牛新书; 徐荭; 徐甲强 . 纳米γ-Fe2O3的合成及气敏性能[J]. 材料研究学报, 2001, 15(5): 593-598.

全文: PDF(661 KB)  
摘要: 硝酸铁乙二醇甲醚溶液体系中加入硅酸乙酯,用溶胶-凝胶法制备γ-Fe2O3纳米晶粉体.硅酸乙酯的加入不但加速凝胶化过程, 而且有效抑制氧化铁晶粒的生长,提高γ-Fe2O3向α-Fe2O3转变的相变温度.TG-DTA热分析结果表明这个相变温度为700℃左右.改变硅酸乙酯的加入量可制备出具有不同晶相的粉体;TEM观测表明粉体的粒径约为10nm. γ-Fe2O3纳米晶粉体的气敏特性具有迅速的响应-恢复性能, 掺入少量Zn可改善气敏特性.
关键词 溶胶-凝胶法硅酸乙酯γ-Fe2O3纳米晶    
Key words
收稿日期: 1900-01-01     
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