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NiFe2O4纳米材料的气敏性能研究
Gas Sensitive Properties of NiFe2O4 Nanoparticles
【摘要】 以FeSO4 ·7H2 O和NiCl2 ·6H2 O为原料 ,通过新型化学共沉淀法制备了纳米尺寸的NiFe2 O4 粉体 ,利用XRD、TEM等手段研究了其结构特性。NiFe2 O4 是一种新型的P型半导体气敏材料。以NiFe2 O4 纳米粉体为原料制备了烧结型旁热式气敏元件 ,该元件对甲苯具有较高的灵敏度和好的选择性 ,并对气敏机理给予了解释。
【Abstract】 NiFe 2O 4 nanoparticles were prepared by chemical co-precipitation with FeSO 4·7H 2O and NiCl 2·6H 2O, and its microstructure are characterized by XRD and TEM analysis. NiFe 2O 4 is a new P-type semiconductor material. The gas sensing properties of NiFe 2O 4 were studied. The investigation demonstrated that the sensors based on NiFe 2O 4 powders had good sensitivity and good selectivity to toluene. The gas sensing mechanism was discussed.
【关键词】 NiFe2O4;
气敏材料;
化学共沉淀;
甲苯;
【Key words】 NiFe2O4; gas-sensing material; co-precipitation; toluene;
【Key words】 NiFe2O4; gas-sensing material; co-precipitation; toluene;
【基金】 云南省科技厅中日国际合作项目 (95E0 0 7)
- 【文献出处】 传感技术学报 ,Journal of Transcluction Technology , 编辑部邮箱 ,2004年03期
- 【分类号】TN304
- 【被引频次】4
- 【下载频次】134