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Modification of sensitivity of BaSnO_3 sensor due to parameters of synthesis and formation of the device

机译:BaSnO_3传感器的灵敏度因器件的合成和形成参数而改变

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摘要

Powders of BaSnO_3 were synthesized to obtain gas sensor thick films (using the screen printing technique) for the detection of O_2 and CO. Impedance spectroscopy was used at different atmospheres and temperatures. In the presence of O_2, the films showed a maximum value of sensitivity at 300 ℃, with the powders formed by Pechini presenting greater reproducibility and sensitivity (with an order of magnitude greater than that for the powders formed by precipitation). Results showed that the films formed with powders obtained using the Pechini method presented a better response to CO, with a maximum sensitivity at 450 ℃. In addition, in the presence of CO and for T > 250 ℃, these films showed an anomalous behavior regarding their sensitivity as a function of time when platinum electrodes were used: a great increase in the electrical resistance value for exposure times greater than 10 min.
机译:合成了BaSnO_3的粉末(采用丝网印刷技术)以获得用于检测O_2和CO的气体传感器厚膜。在不同的气氛和温度下使用了阻抗谱。在存在O_2的情况下,薄膜在300℃时显示出最大值,Pechini形成的粉末具有更高的重现性和敏感性(数量级大于沉淀形成的粉末)。结果表明,用Pechini方法获得的粉末形成的膜对CO的响应更好,在450℃时具有最大的灵敏度。此外,在存在CO且T> 250℃的情况下,当使用铂电极时,这些膜的灵敏度随时间呈异常变化:当暴露时间大于10分钟时,电阻值将大大增加。

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  • 来源
    《Journal of Materials Research》 |2015年第22期|3423-3430|共8页
  • 作者单位

    Department of Physics, CYTEMAC Group, University of Cauca, Popayan 90002, Colombia;

    Catalysts and Surfaces Division, INTEMA, National University of Mar del Plata, Mar del Plata 7600, Argentina;

    Catalysts and Surfaces Division, INTEMA, National University of Mar del Plata, Mar del Plata 7600, Argentina;

    Department of Physics, CYTEMAC Group, University of Cauca, Popayan 90002, Colombia;

    Catalysts and Surfaces Division, INTEMA, National University of Mar del Plata, Mar del Plata 7600, Argentina;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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