新規な多価力チオン伝導性セラミックスの開発とその応用(第59回日本セラミックス協会学術賞受賞研究総説)

概要

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Among the trivalent ion conductor series of Sc_2(WO_4)_3 type and NASICON type that we have reported, the highest ion conductivity was obtained for the trivalent Al^<3+> ion conducting NASICON type (Al_xZr_<1-x>)_<4/(4-x)> Nb(PO_4)_3 solid electrolyte and the value enters the area between yttria stabilized zirconia (YSZ) and calcia stabilized zirconia (CSZ) of well known commercialized high oxide anion conductors. The enhancement of both the ion conductivity and the mechanical strength was simultaneously realized by adding B_2O_3 as a sintering agent during the sintering procedure. The Al^<3+> ion conducting (Al_xZr_<1-x>)_<4/(4-x)>Nb(PO_4)_3 solid electrolyte with the B_2O_3 additive was combined with YSZ, and the refractory oxide based solid was set on the (Al_xZr_<1-x>)_<4/(4-x)> Nb(PO_4)_3 solid surface as the individual auxiliary electrode for carbon dioxide (CO_2), nitrogen oxides (NO_x), sulfur dioxide (SO_2) gas sensing, respectively. The sensor response was rapid, reproducible and continuous with obeying the Nernst theoretical relationship.
社団法人日本セラミックス協会の論文
2005-06-01