ジルコニア固体電解質電池法による溶融Te-Bi系合金の活量測定

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  • Activity of Liquid Te-Bi Alloys Measured by an EMF Method Using Zirconia Electrolyte
  • ジルコニア コタイ デンカイシツ デンチホウ ニ ヨル ヨウユウ Te Biケ

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The activity of the liquid Te-Bi alloys has been determined by the emf measurement of the following galvanic cell:<BR>(This article is not displayable. Please see full text pdf.) <BR>The activities of bismuth and tellurium in the liquid Te-Bi alloys at 880, 930 and 980 K deviate to negative from Raoult’s law over the whole concentration ranges and do not agree with the result by Predel et al. The γBi° and γTe° values are estimated to be 0.19 and 0.15 at 880 K, 0.25 and 0.18 at 930 K, 0.32 and 0.22 at 980 K, respectively. The α function of bismuth against NBi does not show any constant value, suggesting no regular solution behavior in the system.<BR>The free energy of mixing at 980 K shows negative values than ΔGid, and the peak value of ΔG is −8.31 kJ/mol at about NBi=0.51. The heat of mixing also shows negative values. The peak value of ΔH is −9.87 kJ/mol at about NBi=0.45.<BR>It is observed that the anomalous peak values in ΔH and ΔS around the composition of Bi2Te3 are affected by the stable compound in the liquid state.

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  • 日本金属学会誌

    日本金属学会誌 57 (2), 158-163, 1993

    公益社団法人 日本金属学会

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