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V掺杂纳米ZnFe₂O₄的制备及气敏性研究

Fabrication and Gas Sensitivity of Nano-Sized V-doped ZnFe₂O₄ Powder

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【Author】 Jiang Yong, Song Wulin, Xie Changsheng, Zeng Dawen, Wang Aihua, Hu Mulin (State Key Laboratory of Plastic Forming Simulation and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

【机构】华中科技大学模具技术国家重点实验室；华中科技大学模具技术国家重点实验室湖北武汉430074；湖北武汉430074；

【摘要】采用柠檬酸盐热解法制备V掺杂纳米ZnFe2O4,研究了V掺杂对ZnFe2O4的物相结构、厚膜电阻特性和对苯及其衍生物蒸汽气敏特性的影响。结果发现:V掺杂ZnFe2O4的物相单一;施主掺杂剂V大大降低了厚膜元件的电阻,并随掺杂量的增加,电阻逐渐下降;V掺杂还显著提高其对苯及其衍生物的高温敏感性。更多还原

【Abstract】 Raw powder of ZnFe2O4 and V-doped ZnFe2O4 were obtained by the citrate pyrolysis, and the effect of V doping on phase constituents, resistance-temperature behavior and gas-sensing properties to benzene and its derivatives were studied. The results demonstrate that as the increase of V doping amount, raw powder is the spinel structure, the resistance of ZnFe2O4 sensor decrease, and the sensitivity to benzene and its derivatives at higher operating temperature increase.更多还原