Analysis of structural phase transition of Nd2NiO 4 + δ by scanning thermal measurement under controlled oxygen partial pressure

E. Niwa, T. Nakamura, J. Mizusaki, T. Hashimoto

研究成果: Contribution to journalArticle査読

16 被引用数 (Scopus)

抄録

The dependence of the structural phase transition behavior of Nd 2NiO4 + δ between the tetragonal and orthorhombic phases on the oxygen partial pressure, P(O2), has been investigated by differential scanning calorimetry, DSC, and thermogravimetry and differential thermal analysis, TG-DTA. The structural phase transition temperature, T P, decreased with decreasing P(O2), while the variations of enthalpy, ΔH, entropy, ΔS, estimated from the peak area of DSC signals and oxygen content at the phase transition, Δδ, determined from TG curves, exhibited little dependence on P(O2). From the relationship between Tp and P(O2), the variations of standard enthalpy, ΔH°, and entropy, ΔS°, at the phase transition have been evaluated. By considering Δδ, ΔH° and ΔS° exhibited fair agreement with ΔH and ΔS evaluated by DSC.

本文言語英語
ページ(範囲)46-50
ページ数5
ジャーナルThermochimica Acta
523
1-2
DOI
出版ステータス出版済み - 8 20 2011
外部発表はい

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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