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Preparation, Electrical Properties, and Water Adsorption Behavior of (1-x)Sb2O5·xM2O3·nH2O (M = Al, Bi, and Y; 0 ≤ x ≤ 1)

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Abstract

Bi, Y, and Al-doped antimonic acids with the empirical formula (1-x)Sb2O5·xM2O3·nH2O (M =Al, Bi and Y; 0 ≤ x ≤ 1) have been prepared by the direct reaction of an aqueous H2O2 solution with metal alkoxides. The electrical properties have been investigated by ac and dc conductivity measurements using a polycrystalline compactdisc as a sample, in connection with the water adsorption behavior. The (1-x)Sb2O5·xM2O3·nH2O (M = Bi and Y) materials exhibit a solid solution of cubic antimonic acid (Sb2O5·nH2O) with Bi2O3 and Y2O3 in the range of x = 0 - 0.1, and the ionic transference numbers of the materials are all over 0.98. The proton conductivity of (1-x)Sb2O5·xM2O3·nH2O (M = Bi and Y; x = 0.1) at room temperature increases to over 10-3 Scm-1 with an increase in the relative humidity. The conductivity is closely affected by the water adsorption behavior, which seems to be related to the introduction of oxygen vacancies.

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Authors and Affiliations

  1. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan

    Kiyoshi Ozawa, Yoshio Sakka & Muneyuki Amano

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  1. Kiyoshi Ozawa
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  2. Yoshio Sakka
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  3. Muneyuki Amano
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Ozawa, K., Sakka, Y. & Amano, M. Preparation, Electrical Properties, and Water Adsorption Behavior of (1-x)Sb2O5·xM2O3·nH2O (M = Al, Bi, and Y; 0 ≤ x ≤ 1). MRS Online Proceedings Library 658, 91 (2000). https://doi.org/10.1557/PROC-658-GG9.1

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  • DOI: https://doi.org/10.1557/PROC-658-GG9.1

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