Electrocaloric Effect of BZT

• 作 者: Yingtang Zhang Ting Tong Qi Yu
• 机 构: SchoolofMaterialScience&Engineering,ShaanxiUniversityofTechnology,Hanzhong723003
• 出 处: 第十五届全国电介质、材料与应用学术会议
• 发表日期: 2014年5期

　　Electrocaloric effect(ECE)is the interaction of polarization and heat.Upon the application of an external electric field,the polarization states in ferroelectric material orient along the direction of applied field,lowering the entropy and therefore raising the temperature in an isolated system.When the electric field is removed,the polarization states become disorder and absorb some heat from the material crystal lattice,lowering the materials temperature.In recent,because large ECE has recovered in some materials,such as PVDF,PZT and liquid crystal,this field is attracted a great of attention.In this work,Barium titanate-based ceramics were fabricated with using tape-casting technique.The dielectric properties and the electrocaloric effect(ECE)were investigated.The results are shown that the large EC effect is observed at transition temperature.