Sodium sulfate doped with sodium vanadate and rare earth sulfate as a solid electrolyte for a sulfur dioxide gas detector.

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  • Imanaka Nobuhito
    Department of Applied Chemistry, Faculty of Engineering, Osaka University
  • Adachi Gin-ya
    Department of Applied Chemistry, Faculty of Engineering, Osaka University
  • Shiokawa Jiro
    Department of Applied Chemistry, Faculty of Engineering, Osaka University

Abstract

Sodium sulfate doped with NaVO3 and Ln2(SO4)3 (Ln=Eu, Pr, and Y) show higher electrical conductivity for Na+ ions and maintains a high temperature phase, Na2SO4–I, without showing phase transformation. The electromotive force (EMF) using solid solutions, Na2SO4–NaVO3–Ln2(SO4)3 (Ln=Pr and Y), as solid electrolytes exhibits good agreement with the calculated value, the temperature as low as 673 K which is approximately 300 K lower than pure sodium sulfate can be.

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