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.
Журнал: CRYSTALS
Выпуск журнала: Vol. 10, Is. 1
Номера страниц: 51
ISSN журнала: 20734352
Место издания: BASEL
Издатель: MDPI