Study on Energy Storage Properties of(1-x)BNBT6-xLa Lead-free Piezoelectric Ceramics
Author of the article:WANG Ju;LI Guangzhao;HOU Yansheng
Author's Workplace：School of Materials Engineering,Shaanxi Polytechnic Institute,Xianyang 712000,China
Key Words：lead free ferroelectric ceramic energy storage
Abstract：(1-x)BNBT6-xLa(x=0,5,10,15,20,at%)lead-free piezoelectric ceramics were prepared by solid-phase sintering method,and their crystal structure,ferroelectric properties and energy storage properties were studied.The results show that the introduced element La does not change the original perovskite crystal structure of BNBT6,but can improve the density of the material,reduce the coercivity field,reduce the energy required for electric domain reversal,thus changing the characteristics of electric hysteresis loop,and improve the energy storage density of the material.When x=15,the energy storage density of the material is the highest,and the energy density is 0.6 J/cm3 under the action of the electric field intensity of 50 kV/cm,and the energy utilization efficiency is up to 86%,and it indicate that the ceramic is expected to be used in ceramic energy storage capacitors.
