Electrocaloric effect of lead-free inorganic (1-x) [Bi0.5(Na0.84Ka0.16)0.5]TiO3+xBaTiO3+0.3wt%Nb2O5 ceramics

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Han, Jong-Dae^1 ; Yoo, Ju-Hyun^1 ; Hwang, Lark-Hoon^1 ; Jeong, Yeong-Ho^2 ; Lee, Sung-Ill^3

Department of Electrical Engineering, Semyung University, Jecheon

390-711, Korea, Republic of^1

Department of Electrical Engineering, Korea National University of Transportation, Chungju

380-702, Korea, Republic of^2

Department of Safety Engineering, Korea National University of Transportation, Chungju

380-702, Korea, Republic of^3

关键词: Adiabatic temperature change;    Electro-caloric effects;    Indirect methods;    Lead-Free;    Optimal values;    P-E hysteresis loops;    Solid state reaction method;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012083/pdf
DOI  :  10.1088/1757-899X/87/1/012083

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work, in order to develop the ceramics with an excellent electrocaloric effect, (1-x) [Bi0.5(Na0.84Ka0.16)0.5]TiO3+xBaTiO3+0.3wt%Nb2O5[(1-x)BNKT-xBT] ceramics (x = 0, 0.04) were fabricated by conventional solid state reaction method. To investigate the electrocaloric effect of the ceramics, P-E hysteresis loops were measured in various temperature ranges from room temperature to 200°C. The adiabatic temperature change ΔT of these ceramics was measured using indirect method, which was calculated using the Maxwell's relations. The optimal value of adiabatic temperature change ΔT was obtained as 0.31°C at 165°C under applied electric fields 45 kV/cm in x = 0 ceramics.