The Electrocaloric Effect of BaTiO3 Ceramics Using Hydrothermal Synthesized Nano-sized Starting Powders
The electrocaloric effect (ECE) of barium titanate ceramics with hydrothermal synthesized nano-sized starting powders was investigated.The Curie point and latent heat of the phase transition were characterized by a differential scanning calorimeter (DSC).The P-E hysteresis loops were measured in the temperature range from 30-160℃ and ECE adiabatic temperature change was obtained according to the Maxwell relation.A double hysteresis loop is observed at the temperature slightly above the Curie point,which indicates a good consistency of phase transition similar to single crystal.It is also proved by the sharp endothermic peak of phase transition in DSC curves.It exhibits a high ECE of ATmax=1.3K under a low applied field of 10kV/cm,which is much higher than that of the sample using micron-sized starting powders.
Electrocaloric effect Nanometer powders Ferroelectrics Phase transitions
Xi Han Yang Bai Lijie Qiao
Key Laboratory of Environmental Fracture(Ministry of Education),Advanced Material and Technology Institute,University of Science and Technology Beijing,Beijing 100083,China
国际会议
桂林
英文
138-141
2012-07-16（万方平台首次上网日期，不代表论文的发表时间）