Sulfur Dioxide Gas Sensor Based on Al³⁺ and O²⁻ Ion ConductingSolids with Gadolinium Oxysulfate Based Auxiliary Sensing Electrode

Authors: Inaba, Yuichi; Nagai, Tsukasa; Tamura, Shinji; Imanaka, Nobuhito

Source: Sensor Letters, Volume 6, Number 3, June 2008 , pp. 458-461(4)

Publisher: American Scientific Publishers

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Abstract:

A new solid electrolyte type sulfur dioxide gas sensor was fabricated by the combination of trivalent aluminum cation conducting (Al_0.2Zr_0.8)_20/19Nb(PO₄)₃ solid and divalent oxide anion conducting yttria stabilized zirconia (YSZ) with 0.8Gd₂O₂SO₄-0.2NaAl(SO₄)₂ as an auxiliary sensing electrode. Since the present sensor showed such a superior sensing performance of continuous and rapid response and also showed a linear relationship between the sensor EMF output and the logarithm of the SO₂ gas concentration with obeying the theoretical Nernst relationship, it is greatly expected to be a practical SO₂ gas sensing device.

Keywords: GAS SENSOR; SULFUR DIOXIDE; SOLID ELECTROLYTE; RARE EARTH OXYSULFATE

Document Type: Short communication

DOI: http://dx.doi.org/10.1166/sl.2008.065

Publication date: 2008-06-01

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