Optimized electrocaloric refrigeration capacity in lead-free (1-x)BaZr0.2Ti0.8O3-xBa0.7Ca0.3TiO3 ceramics

被引：151

作者：

Bai, Yang ^{[1
]}

Han, Xi ^{[1
]}

Qiao, Lijie ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Key Lab Environm Fracture, Minist Educ, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 25期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.4810916

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper demonstrates the impact of composition on the electrocaloric effect in lead-free (1 - x)BaZr0.2Ti0.8O3-xBa(0.7)Ca(0.3)TiO(3) ceramics, especially on the morphotropic phase boundary. The samples exhibited typical diffused ferroelectric-paraelectric phase transition, which was diffused the most around the tricritical point of rhombohedral, tetragonal, and cubic phases at x = 0.3. The x = 0.3 sample had the highest Delta T-max of 0.30 K under 20 kV/cm field and the widest cooling peak within a wide composition range, which endowed it with the best refrigeration capacity. Although the x = 0.7 sample had even higher Delta T-max, less diffused phase transition narrowed the cooling peak, which reduced the refrigeration capacity. (C) 2013 AIP Publishing LLC.

引用

页数：4

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