中华医学超声杂志

应用化学 ›› 1998, Vol. 0 ›› Issue (5): 14-17.

• 研究论文 • 上一篇    下一篇

几种尖晶石型复合氧化物纳米粉体的制备及气敏性

杨晓娟, 刘尔生, 陈耐生, 黄金陵   

  1. 福州大学化学系功能材料研究所 福州350002
  • 收稿日期:1997-11-19 修回日期:1998-06-17 出版日期:1998-10-10 发布日期:1998-10-10

Preparation and Gas-sensitivity of Several Spinel-type Nanocrystalline Mixed Oxides

Yang Xiaojuan, Liu Ersheng, Chen Naisheng, Huang Jinling   

  1. Research Institute of Functional Materials, Fuzhou University, Fuzhou 350002
  • Received:1997-11-19 Revised:1998-06-17 Published:1998-10-10 Online:1998-10-10

PDF

681

被引次数

26

摘要： 采用化学共沉淀法合成了4种尖晶石型复合氧化物MFe2O4(M=Cu2+,Zn2+,Cd2+,Mg2+).X射线粉末衍射分析、透射电镜及比表面测定等表征结果表明它们均为具有较大比表面积的纳米粉体,平均粒径<50nm.将样品做成厚膜型气敏元件,测定了其对乙炔、液化石油气、一氧化碳、氢气和乙醇等还原(可燃)性气体的气敏特性。

关键词: 尖晶石型复合高铁氧化物, 纳米晶, 制备, 气敏性

Abstract: Four spinel-type mixed oxide nanocrystalline powders MFe2O4(M=Cu2+, Zn2+, Cd2+ and Mg2+) were prepared by chemical coprecipitation method. The products were characterized by means of powder XRD, TEM and specific surface area measurements. The results reveal that the samples are nanocrystalline powders with high specific surface areas. Their gas sensitivities to reductive gases depend on their specific surface area: the larger the specific surface area, the higher the sensitivity.

Key words: spinel-type mixed ferric oxide, nanocrystalline, preparation, gas sensitivity

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