人工晶体学报2026，Vol.55Issue(1)：93-102,10.DOI:10.16553/j.cnki.issn1000-985x.2025.0112
BST-BZT叠层弛豫铁电陶瓷的制备及其电卡效应研究
Preparation of BST-BZT Laminated Relaxor Ferroelectric Ceramics and Their Electrocaloric Effect
摘要
Abstract
Lead-free relaxor ferroelectric based laminated ceramics are one of the important choices for environmentally friendly electrocaloric solid-state refrigeration devices.In this study,the x(Ba0.65Sr0.35)TiO3-(1-x)Ba(Zr0.2Ti0.8)O3(0.8BST-0.2BZT,x=0.8;0.2BST-0.8BZT,x=0.2)thick films were prepared via tape-casting process,and the laminated ceramics of 0.8BST-0.2BZT/0.2BST-0.8BZT/0.8BST-0.2BZT were constructed using a stacking process.Meanwhile,0.8BST-0.2BST and 0.2BST-0.8BZT ceramics were prepared by solid-state reaction for comparison,and their microstructure,dielectric temperature characteristics,ferroelectricity,and electrocaloric effects were studied.The research results indicate that laminated ceramics have more pronounced dielectric relaxation characteristics and larger polarization difference(Ps-Pr).The significant electrocaloric effect(ΔT=0.9 K)and wide broad working temperature span(Tspan=50℃)of laminated ceramics were measured using indirect measurements under an electric field of 50 kV/cm.This result is further verified by direct measurements under 25 kV/cm,and significant electrocaloric temperature change(ΔT=0.25 K)and Tspan(>45℃)were observed.This work demonstrates that the developed laminated ceramics possess excellent temperature stability and wide temperature range adaptability,showing great potential for electrocaloric cooling applications.关键词
弛豫铁电体/叠层陶瓷/电卡效应/工作温区/直接法测量/间接法测量Key words
relaxor ferroelectric/laminated ceramics/electrocaloric effect/working temperature span/direct measurement/indirect measurement分类
数理科学引用本文复制引用
薛飞,田娅晖,金玲..BST-BZT叠层弛豫铁电陶瓷的制备及其电卡效应研究[J].人工晶体学报,2026,55(1):93-102,10.基金项目
国家自然科学基金(52562016,52162017) （52562016,52162017）
江西省自然科学基金(20252BAC240391,20252BAC200166) （20252BAC240391,20252BAC200166）
