Thermophysical study of structural phase transitions in Na0.95Li0.05NbO3 solid solution

Описание

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.3103/S1062873816090148

Ключевые слова: Niobium oxide, Sodium, Specific heat, Temperature distribution, Thermal expansion, Ceramic samples, Effect of heat treatments, Possible mechanisms, Sodium lithium niobate, Structural distortions, Structural phase transition, Temperature dependence, Temperature range, Lithium

Аннотация: Temperature dependences of specific heat Cp(T) and coefficient of thermal expansion ;(T) for Na0.95Li0.05NbO3 sodium-lithium niobate ceramic samples are investigated in the temperature range of 100–800 K. The Cp(T) and ?(T) anomalies at T3 = 310 ± 3 K, T2 = 630 ± 8 K, and T1 = 710 ± 10 K are observed, which correspond to the sequenПоказать полностьюce of phase transitions N - Q - S(R) - T2(S). The effect of heat treatment of the samples on the sequence of structural distortions was established. It is demonstrated that annealing of the samples at 603 K leads to splitting of the anomaly corresponding to the phase transition Q > R/S in two anomalies. After sample heating to 800 K, the only anomaly is observed in both the Cp(T) and ;(T) dependence. Possible mechanisms of the observed phenomena are discussed. © 2016, Allerton Press, Inc.

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Издание

Журнал: Bulletin of the Russian Academy of Sciences: Physics

Выпуск журнала: Vol. 80, Is. 9

Номера страниц: 1046-1050

ISSN журнала: 10628738

Авторы

  • Gorev M.V. (Siberian Federal University)
  • Bondarev V.S. (Siberian Federal University)
  • Flerov I.N. (Siberian Federal University)
  • Raevskaya S.I. (Southern Federal University)
  • Malitskaya M.A. (Southern Federal University)
  • Raevskii I.P. (Southern Federal University)

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