会议专题

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

  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.

BNT-BT-KNN Energy-storage density Anti-ferroelectric

Feng Gao Xianlin Dong Chaoliang Mao Fei Cao Genshui Wang

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

国际会议

the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

太原

英文

679-684

2012-07-13(万方平台首次上网日期,不代表论文的发表时间)