Synthesis, Microstructure, and Dielectric Properties of Mn-doped 0.33BaTiO3-0.67BiFeO3 Multiferroic Solid Solutions

摘要：

　　In this work,0.33BaTiO3-0.67BiFeO3 multiferroic ceramics doped with x mol% MnO2 (x= 0.1-1.0) were fabricated by solid-state reaction method,and their microstructure and dielectric property were also investigated.The perovskite phase structure of the solid solutions was confirmed by X-ray diffraction patterns,and the formation of minor impure phase of Bi2Fe4O9 was prevent effectively by Mn-doping.With increasing the Mn-doped concentration,the dielectric constants of Mn-doped 0.33BaTiO3-0.67BiFeO3 multiferroic ceramics first increased,and reached a maximum value of 340 (measured @1MHz) at the Mn-doped concentration of 0.60 mol%,and then decreased.On the other hand,the dielectric losses first decreased,and reached the minimum value at the Mn-doped concentration of 0.30 mol%,and then increased along with increasing the Mn-doped concentrations.The ferroelectric domain structures in the Mn-doped 0.33BaTiO3 - 0.67BiFeO3 multiferroic ceramics with rhombohedral symmetry were also revealed by TEM image and selected area electron diffraction patterns,and tweed-like domain structures were observed.

关键词： Mn-doping BaTiO3 BiFeO3 Multiferroic solid solution Microstructure character Dielectric property

作者: Qiming Hang Feng Shan Jianmin Zhu Xinhua Zhu

作者单位: National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, 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: 107-112

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）