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．
Four spinel type mixed oxide nanocrystalline powders MFe 2O 4(M=Cu 2+ , Zn 2+ , Cd 2+ and Mg 2+ ) 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.
出处
《应用化学》
CAS
CSCD
北大核心
1998年第5期14-17,共4页
Chinese Journal of Applied Chemistry
关键词
气敏材料
尖晶石型
纳米晶
气敏性
复合氧化物
spinel type mixed ferric oxide,nanocrystalline,preparation,gas sensitivity
