Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning 110016, China.
School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang, Liaoning 110016, China.
Mater Horiz. 2023 Mar 6;10(3):977-982. doi: 10.1039/d2mh00905f.
As a promising environment-friendly alternative to current vapor-compression refrigeration, solid-state refrigeration based on the barocaloric effect has been attracting worldwide attention. Generally, both phases in which a barocaloric effect occurs are present at ambient pressure. Here, instead, we demonstrate that KPF exhibits a colossal barocaloric effect due to the creation of a high-pressure rhombohedral phase. The phase diagram is constructed based on pressure-dependent calorimetric, Raman scattering, and neutron diffraction measurements. The present study is expected to provide an alternative routine to colossal barocaloric effects through the creation of a high-pressure phase.
作为当前蒸气压缩制冷的一种有前途的环保替代品，基于压致热效应的固态制冷已经引起了全世界的关注。通常，压致热效应发生的两个相都存在于环境压力下。在这里，我们展示了 KPF 由于高压菱形相的形成而表现出巨大的压致热效应。相图是基于压力相关的量热法、拉曼散射和中子衍射测量来构建的。本研究有望通过创造高压相来提供一种获得巨大压致热效应的替代方法。
