掺有过渡金属氧化物的氧化铁系统陶瓷的气敏特性  

Gas Sensitivity of Ferric Oxide Ceramics with Transition-Metal Oxide

作　　者：贺蕴秋[1] 解庆红[1] 

机构地区：[1]同济大学材料工程系,上海200433

出　　处：《无机材料学报》1997年第1期54-58,共5页Journal of Inorganic Materials

基　　金：上海市自然科学基金

摘　　要：掺有过渡金属氧化物的氧化铁系统陶瓷在不同温度下烧结，如CuO－Fe2O3和ZnO-Fe2O3系统，形成α－Fe2O3和含有铁空位的尖晶石晶相.材料对还原气体具有显著的气敏性.尖晶石相和其中的铁空位浓度随组成和烧结温度而变化.文章认为材料的气敏性因铁空位而产生，并随铁空位浓度增加灵敏度上升.The ferric oaide system with transition metal oxides such as CuO-Fe2O3 and ZnO-Fe2O3, were Sintered at different temperatures and formed a porous ceramic with a-Fe2O3 and spinel crystal phases. This ceramic possesses a remarked sensitivity to reductive gases. The special property is considered to relate to the ferric vacancy coccentration in a spinel phase. The ferric vacancy concentration varies with composition and heating temperature. The gas sensitivity can be improved by the increment of the ferric vacancy concentration.

关 键 词：气敏性 氧化铁陶瓷 陶瓷 掺杂 金属氧化物 

分 类 号：TQ174.758[化学工程—陶瓷工业]