Zhao Quanliang, Sheng Tianyu, Pang Lei, He Guangping, Di Jiejian, Zhao Lei, Hou Zhiling, Cao Maosheng
School of Mechanical and Materials Engineering, North China University of Technology Beijing 100144 China
School of Science, Beijing University of Chemical Technology Beijing 100029 China.
RSC Adv. 2019 Oct 23;9(59):34114-34119. doi: 10.1039/c9ra06551b.
Adiabatic temperature variation (Δ), coefficient of performance (COP) and electrocaloric coefficient (Δ/Δ) play important roles in evaluating the comprehensive performance of solid-state cooling technology based on the electrocaloric effect (ECE). A Nb and Sn co-doped lead zirconate titanate antiferroelectric film, PbNb(ZrSnTi)O (PNZST), shows a highly efficient and giant negative ECE. The Δ, |Δ/Δ| and COP are about -9.8 K, 0.0488 K cm kV and 35.53 at around 50 °C, respectively. The full width at half maximum of the Δ peak is about 37 °C. Phenomenological analysis indicates that the highly efficient and giant negative ECE is associated with the first-order transition that has a discontinuous polarization change with increasing temperature.
绝热温度变化（Δ）、性能系数（COP）和电致热系数（Δ/Δ）在基于电致热效应（ECE）评估固态冷却技术的综合性能方面起着重要作用。一种铌和锡共掺杂的锆钛酸铅反铁电薄膜PbNb(ZrSnTi)O（PNZST）表现出高效且巨大的负电致热效应。在约50°C时，Δ、|Δ/Δ|和COP分别约为-9.8 K、0.0488 K·cm/kV和35.53。Δ峰的半高宽约为37°C。唯象分析表明，高效且巨大的负电致热效应与随着温度升高极化发生不连续变化的一级相变有关。
