Ni-LaFeO3的微波化学制备及气敏性能研究

摘要

Ni-LaFeO3 powder was prepared by the method of microwave chemical synthesis. The crystal structure and morphologies of Ni-LaFeO3 were characterized. The results show that the Ni-LaFeO3 was pure perovs-kite structure, the dispersive of Ni-LaFeO3 particle is uniform and the particle size was about 187nm. The sensitivity and selectivity of LaFe0.9 Ni0.1 O3 for 5. 0×10-4 formaldehyde are good, the response and recovery time are about 20 and 30s, respectively.%利用微波化学法制备了Ni掺杂的LaFeO3粉体,并对其晶体结构和性能进行表征与分析,结果表明,Ni掺杂LaFeO3粉体为单一正交钙钛矿结构,没有杂相峰出现,且LaFe0.9Ni0.O3颗粒呈椭球状,颗粒粒径约为178nm,颗粒分散性较好；LaFe0.9 Ni0.1O3元件在工作温度为200℃时对5.0×10-4甲醛气体的灵敏度为9,且具有良好的选择性,响应和恢复时间分别是20和30s.