Features of the Behavior of the Barocaloric Effect near Ferroelectric Phase Transition Close to the Tricritical Point

Описание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.3390/cryst10010051

Ключевые слова: polymorphic phase transformation, phase diagram, order-disorder phenomena, entropy, barocaloric effect, Barocaloric effect; Disorder phenomena; Entropy; Order; Phase diagram; Polymorphic phase transformation

Аннотация: A detailed study of the effect of temperature and pressure on heat capacity, entropy and hysteresis phenomena near the ferroelectric phase transition in ammonium sulfate (AS) was performed. An analysis of experimental results within the framework of the phenomenological theory showed that taking into account the temperature-dependeПоказать полностьюnt part of the anomalous entropy leads to a significant increase in the barocaloric effect (BCE). The maximum values of extensive and intensive BCE near the tricritical point are outstanding: Delta S-BCE(max) approximate to 85 J/kgK, Delta T-AD(max) approximate to 12 K and can be achieved at low pressure similar to 0.5 GPa.

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Издание

Журнал: CRYSTALS

Выпуск журнала: Vol. 10, Is. 1

Номера страниц: 51

ISSN журнала: 20734352

Место издания: BASEL

Издатель: MDPI

Авторы

  • Mikhaleva E.A. (Russian Acad Sci, Fed Res Ctr KSC, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia)
  • Flerov I.N. (Russian Acad Sci, Fed Res Ctr KSC, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660074, Russia)
  • Gorev M.V (Russian Acad Sci, Fed Res Ctr KSC, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660074, Russia)
  • Bondarev V.S. (Russian Acad Sci, Fed Res Ctr KSC, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660074, Russia)
  • Bogdanov E.V (Russian Acad Sci, Fed Res Ctr KSC, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia; Krasnoyarsk State Agr Univ, Inst Engn Syst & Energy, Krasnoyarsk 660049, Russia)

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