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http://dx.doi.org/10.3740/MRSK.2003.13.2.115

Fabrication and Sensing Properties of NASICON Thick Film SO2 Gas Sensor Using Screen-print Method  

Bae, J.C. (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Lee, S.T. (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Jun, H.K. (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Bang, Y.I. (Dept. of Electronic and Electrical Eng., Kyungpook National University)
Lee, D.D. (Dept. of Electronic and Electrical Eng., Kyungpook National University)
Huh, J.S. (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Publication Information
Korean Journal of Materials Research / v.13, no.2, 2003 , pp. 115-119 More about this Journal
Abstract
The thick film type sensor having Pt/Na Super Ionic Conductor(NASICON) solid electrolyte/Pt/$Na_2$$SO_4$/Pt catalyst system for $SO_2$gas was fabricated by screen-print method. The phase of Na Super Ionic Conductor solid electrolyte sintered at different temperature of 1050, 1150,$ 1250^{\circ}C$ and for different time of 1.5, 2.5, 3.5 hr were investigated by XRD. The Electromotive Force variation of the sensor with $SO_2$concentrations and operating temperatures were investigated. The major phase of Na Super Ionic Conductor film sintered at 115$0^{\circ}C$ for 3.5 hr was sodium zirconium silicon phosphate($Na_3$Zr$_2$$Si_2$PO$_{12}$). The Nernst's slope of Na Super Ionic Conductor sensor for $SO_2$gas with the variation of concentration from 10 to 100 ppm was 167.14 ㎷/decade at the operating temperature of $500 ^{\circ}C$. The increase of oxygen partial pressure was not affected to the variation of Nernst's slope.e.
Keywords
NASICON; screen-print; $SO_2$gas sensor;
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