Manipulating Zr/Ti ratio based on phase diagram for large electrocaloric effects with multiple target operation temperatures in PLZT ceramics  

作　　者：Junjie Li Ruowei Yin Zhe Xiong Yizheng Bao Xing Zhang Wenjuan Wu Lezhong Li Yang Bai 

机构地区：[1]Sichuan Province Key Laboratory of Information Materials and Devices Application,College of Optoelectronic Engineering,and Chengdu IC Valley Industrial College,Chengdu University of Information Technology,Chengdu 610225,China [2]Beijing Advanced Innovation Center for Materials Genome Engineering,and Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China [3]Chengdu Hongming Electronics Co.,Ltd.,Chengdu 610199,China [4]Key Laboratory of Inorganic Functional Materials and Devices,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201800,China [5]Sichuan Meteorological Optoelectronic Sensor Technology and Application Engineering Research Center,Chengdu University of Information Technology,Chengdu 610225,China

出　　处：《Journal of Advanced Ceramics》2024年第9期1422-1431,共10页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.52302134 and 52173217);the Sichuan Science and Technology Program(No.2023NSFSC0975);the Scientific Research Foundation of Chengdu University of Information Technology(No.KYTZ202246);the open research fund of the Sichuan Province Key Laboratory of Information Materials and Devices Application(No.2023XXCL003).

摘　　要：Ferroelectric phase transition has been identified as a promising avenue for designing high-performanceelectrocaloric materials for zero-emission and solid-state refrigeration. However, extensive research has been limited todeveloping ferroelectric materials with large electrocaloric effects near room temperature, preventing them from meetingdiverse refrigeration requirements. In this study, by leveraging the room-temperature phase diagram of the (PbLa)(ZrTi)O_(3)solution, we prepared a series of Pb_(0.775)La_(0.15)Zr_(x)Ti_(1−x)O_(3) bulk ceramics spanning the ferroelectric and relaxor ferroelectricphase regions. This enabled the attainment of various phase transition features and temperatures. Finally, largeelectrocaloric effects, coupled with adjustable operation temperatures ranging from 150 to −45℃, are successfullyachieved through manipulation of the Zr/Ti ratio. This comprehensive range of operation temperatures effectively addressesdiverse refrigeration application requirements, ranging from industrial equipment to freezer cabinets. This work not onlyunderscores the expansion of the electrocaloric refrigeration application domain but also proposes a material designstrategy tailored to meet these evolving demands.

关 键 词：electrocaloric effect phase transition phase diagram ferroelectric ceramics 

分 类 号：TN303[电子电信—物理电子学] TQ174.1[化学工程—陶瓷工业]