Energy-storage Study in Lead-free Anti-ferroelectric Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3 Ceramics

摘要：

　　Lead-free (1-x-y)Bi0.5Na0.5TiO3-xBaTiO3-yK0.5Na0.5NbO3 (BNT-BT-KNN) ceramics were fabricated by traditional sintering method.The X-ray diffraction patterns showed that the ceramics are all crystallized into a perovskite structure phase.Measurements of temperature-dependent dielectric constants showed the two typical shoulders observed in the BNT-BT binary system,indicating that the ceramics are also of relaxor anti-ferroelectric nature.Moreover,it was observed that the dielectric constants decreased sharply with the increase of KNN addition,while maintained the same level when the BNT/BT ratio changed.The P-E hysteresis loops showed that the saturated polarization and the remnant polarization both decreased with the increasing addition of KNN,while the reduction of the BNT/BT ratio enhancesd the saturated polarization.The energy-storage density calculated from the P-E loops also increased with the decrease of KNN addition and BNT/BT ratio,which further demonstrated that the key for improving the energy density of BNT-BT-KNN ceramics is relatively low addition of KNN and low BNT/BT ratio.

关键词： BNT-BT-KNN Energy-storage density Anti-ferroelectric

作者: Feng Gao Xianlin Dong Chaoliang Mao Fei Cao Genshui Wang

作者单位: Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics,Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 679-684

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）