SO<SUB>2</SUB> Concentration Cell with Li<SUB>2</SUB>O–B<SUB>2</SUB>O<SUB>3</SUB>–Li<SUB>2</SUB>SO<SUB>4</SUB> Solid Electrolyte

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  • SO2 Concentration Cell with Li2O-B2O3-Li2SO4 Solid Electrolyte
  • SO2 Concentration Cell with Li2O B2O3 L
  • SO<SUB>2</SUB> Concentration Cell with Li<SUB>2</SUB>O&ndash;B<SUB>2</SUB>O<SUB>3</SUB>&ndash;Li<SUB>2</SUB>SO<SUB>4</SUB> Solid Electrolyte

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Abstract

Crystallization of a glass with the composition of 33.9Li2O–33.9B2O3–29Li2SO4–3.2Al2O3 was investigated by DTA and Dilatation methods. The electrical conductivity of the crystalline glass and the electromotive force (E.M.F.) of the concentration cell made with the crystalline glass as the solid electrolyte were measured.<BR>The results indicate that the glass-transition temperature is 650 K and the softening temperature of the crystalline glass is higher than 971 K.<BR>The temperature dependence of the specific conductivity are expressed as follows;<BR>log(σ⁄(S·m−1))=−5.26×103⁄(T⁄K)+5.50 (593–833 K),<BR>log(σ⁄(S·m−1))=−1.87×103⁄(T⁄K)+2.66 (833–971 K),<BR>and their apparent activation energies for electrical conduction are 100.8 kJ·mol−1(593–833 K) and 35.9 kJ·mol−1(833–943 K).<BR>The concentration cells showed a stable Nernstian E.M.F. corresponding to the partial pressure of SO2 in a range of 43–800 ppm SO2 in a stream containing 21 kPa O2. The response time of the cell was 150 to 900 s at 873 K.

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