| 氧化法制备纳米级α－Fe_2O_3气敏陶瓷粉体的比较 |
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| 引用本文： | 王忠春,刘尔生,陈耐生,黄金陵. 氧化法制备纳米级α－Fe_2O_3气敏陶瓷粉体的比较[J]. 结构化学, 1996, 0(6) |
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| 作者姓名： | 王忠春 刘尔生 陈耐生 黄金陵 |
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| 作者单位： | 福州大学化学系，中科院上海硅酸盐所 |
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| 基金项目： | 福建省科委及省教委资助 |
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| 摘 要： | 分别用空气氧化和Ｈ２Ｏ２氧化沉淀法制得了纳米级α－Ｆｅ２Ｏ３气陶瓷粉料，对粉体进行了ＸＲＤ物相分析及晶粒度、晶格畸变率的测定，以ＴＥＭ观察其形貌并测得了平均粒径，采用迎头色谱法测定其比表面积。结果对照表明，Ｈ２Ｏ２氧化法制得的粉体粒度更小，而且该法还具有不引入有害杂质，便于共沉掺杂等优点，是更有发展前途的α－Ｆｅ２Ｏ３基气敏陶瓷粉料制备方法。
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| 关 键 词： | α－Fe_2O_3，纳米粉体，气敏陶瓷，表征 |
Preparation and Characterization of α-Fe_2O_3 Ultrafine Particles for Ceramic Gas Sensors |
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| WANG Zhong-Chun, LIU Er-Sheng, CHEN Nai-Sheng, HUANG Jin-Ling. Preparation and Characterization of α-Fe_2O_3 Ultrafine Particles for Ceramic Gas Sensors[J]. Chinese Journal of Structural Chemistry, 1996, 0(6) |
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| Authors: | WANG Zhong-Chun LIU Er-Sheng CHEN Nai-Sheng HUANG Jin-Ling |
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| Affiliation: | Fuzhou Universdy Fuzhou 350002 |
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| Abstract: | ?Fe2O3 ultrafine particles for ceramic gas sensors were prepared by two precipitation methods. One uses air as oxidant, the other H2O2. The products have been characterized by XRD and TEM, and their specific surfaces have also been determined by front chromatography. The powder prepared by the latter method has been found to have smaller mean particle size and larger specific area. Furthermore,the latter method has also the advantage that it doesn't bring with impurities harmful to gas-sensitivity and is convenient to be used to dope half-metal elements,e.g. Sn and Sb, through co-precipitation. |
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| Keywords: | ?Fe_2O_3 ceramic nanometer-sized powder gas-sensitive material characterization |
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