A new solid electrolyte type sulfur dioxide gas sensor was fabricated by the combination of the trivalent aluminum cation conducting (Al0.2Zr0.8)20/19Nb(PO4)3solid and the divalent oxide anion conducting yttria stabilized zirconia (YSZ) with the NaAl(SO4)2solid as a detecting auxiliary electrode. Since the present sensor showed such a superior sensing performance of theoretical response, which obeys the Nernst relationship between the sensor EMF output and the logarithm of the SO2gas concentration, along with the stable, continuous, and reproducible response, it is greatly expected to be applied to a practical SO2gas sensing device. © 2007 Elsevier B.V. All rights reserved.
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