Preparation of Nano-Crystalline SmFeO<sub>3</sub> Film and Its Gases Sensitivity to Gasoline-Methanol Mixture

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Abstract Perovskite type SmFeO₃ film was synthesized by a modified solgel method using soluble inorganic salts of Sm(NO₃)₃·6H₂O and Fe(NO₃)₃·9H₂O as raw materials. Based on the synthesized nano-crystalline SmFeO₃ films, indirectly heated gas sensors were fabricated. The changes of precursor during sintering were analyzed by TG-DSC. The crystal phases were characterized by XRD, and the film surface topography were performed by SEM. The experiments showed 30 nmcrystalsize SmFeO₃ of perovskite type with uniform particle size was obtained when the sintering temperature was 750 ℃. The sensitivity tests of the sensors to gasolinemethanol mixture gases showed: SmFeO₃ materials had a good sensitivity to gasoline-methanol mixture gases with 15%—85% methanol, and both the response time and the recover time were less than 5 seconds. This work provides the foundation to promote the applications of gasolinemethanol mixture fuel to automobile.

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	SHEN 恩Hua
	JI Hui-Ming
	TANG Xu-Wen
	ZHANG 　Hua

Keywords： SmFeO₃ film sol-gel gasoline-methanol gas sensor

Fund:

国家863项目：奇瑞新一代甲醇灵活燃料汽车开发(2008AA11A148)

Cite this article:

SHEN En-Hua, JI Hui-Ming, TANG Xu-Wen, ZHANG 　Hua.Preparation of Nano-Crystalline SmFeO₃ Film and Its Gases Sensitivity to Gasoline-Methanol Mixture[J] Chemcial Industry and Engineering, 2011,V28(4): 1-4

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