کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7148219 | 1462103 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impedancemetric acetylene gas sensing properties of Sm-Fe-based perovskite-type oxide-based thick-film device
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Impedancemetric acetylene gas sensing properties of Sm-Fe-based perovskite-type oxide-based thick-film device Impedancemetric acetylene gas sensing properties of Sm-Fe-based perovskite-type oxide-based thick-film device](/preview/png/7148219.png)
چکیده انگلیسی
Perovskite-type Sm1âxCaxFeO3 (x = 0, 0.05, 0.20, 0.50, 0.75, 1.0) powders as sensor materials were prepared by a wet-chemical route using a polymer precursor method at 750 °C. A perovskite-type oxide thick-film device prepared by a screen-printing method was used for an acetylene (C2H2) sensor for which outputs were measured by AC impedance spectroscopy at 400 °C. Although sensitivities of the devices using oxides with Ca2+ substitution were decreased because of reduction in the amount of impedance change between air and sample gas, the device without Ca2+ substitution showed extremely high response at a low frequency. According to Nyquist's plots of the SmFeO3 device, this is attributed to the fact that impedance of charge transfer from the surface reaction was taken at a low frequency. It was also found that the sensor devices showed good selectivity to interference gases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 187, October 2013, Pages 128-134
Journal: Sensors and Actuators B: Chemical - Volume 187, October 2013, Pages 128-134
نویسندگان
Tomohisa Tasaki, Satoko Takase, Youichi Shimizu,