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化学工业与工程 2011, Vol. 28 Issue (4) :1-4    DOI:
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纳米晶SmFeO3薄膜的制备及其对汽油-甲醇混合气体敏感性能
 沈恩华, 季惠明, 汤绪雯, 张　华
1．奇瑞汽车股份有限公司，安徽 芜湖 241009； 2．天津大学材料科学与工程学院，天津 300072
Preparation of Nano-Crystalline SmFeO3 Film and Its Gases Sensitivity to Gasoline-Methanol Mixture
 SHEN  En-Hua, JI  Hui-Ming, TANG  Xu-Wen, ZHANG  　Hua
1 Chery Automobile Co. Ltd., Wuhu 241006, China;  
2 School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
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摘要 以钙钛矿结构SmFeO3薄膜材料为研究对象，以可溶性无机盐Sm(NO3)3·6H2O和Fe(NO3)3·9H2O等为主要原料，利用改进的溶胶凝胶技术首先制备了纳米晶结构的SmFeO3薄膜材料，并以此为基础制备了旁热式气敏传感器。以TG-DSC分析讨论了前驱体热处理过程中的变化，用X射线衍射(XRD)分析了晶相结构，用扫描电子显微镜(SEM)表征了薄膜的表面形貌。试验发现利用该工艺在750 ℃烧结温度下，可以得到颗粒度均匀，尺寸在30 nm左右的钙钛矿结构SmFeO3薄膜材料。通过传感器对汽油-甲醇混合气体测试表明，SmFeO3材料对含15%~85%甲醇的汽油-甲醇混合气体具有较高的灵敏度，响应与恢复时间小于5 s。该研究工作对推动汽油甲醇混合燃料在汽车等方面的应用奠定了基础。
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沈恩华
季惠明
汤绪雯
张　华
关键词： SmFeO3   薄膜   溶胶凝胶法   汽油甲醇   气敏传感器     
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.
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)
引用本文:   
沈恩华, 季惠明, 汤绪雯, 张　华.纳米晶SmFeO3薄膜的制备及其对汽油-甲醇混合气体敏感性能[J].  化学工业与工程, 2011,28(4): 1-4
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, 2011,28(4): 1-4
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