Conventional and inverse barocaloric effects in ferroelectric NH4HSO4

JOURNAL OF ALLOYS AND COMPOUNDS

卷:806

Article

Gorev, Mikhail, V^1,2  Mikhaleva, Ekaterina A.^1,2  Flerov, Igor N.^1,2  Bogdanov, Evgeniy, V^1,3 

[1] Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia

[2] Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk, Russia

[3] Krasnoyarsk State Agr Univ, Inst Engn Syst & Energy, Krasnoyarsk 660049, Russia

关键词: Polymorphic phase transformation;    Phase diagram;    Order-disorder phenomena;    Entropy;    Barocaloric effect;   

DOI  :  10.1016/j.jallcom.2019.07.273

来源: Elsevier

【 摘 要 】

In this study, the conventional and inverse barocaloric effects (BCE) in ferroelectric NH4HSO4 are reported. Maximum extensive and intensive BCE near order-disorder phase transition can be achieved at low pressure p <= 0.1 GPa. Large thermal expansion of the crystal lattice plays a very important role in the developing conventional BCE and conversation between BCE of different sign in the narrow temperature range. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

Free