Enhanced Dielectric and Ferroelectric Properties of 0.57(Bi,La)FeO3-0.43PbTiO3 Multiferroic Ceramics by the Ti Substitution
The ceramics of 0.57(Bi0.8La0.2)(Fe1xTix)O3-0.43PbTiO3 (BLFT-PT) for 0≤ x ≤ 0.15 have been synthesized by the solid state reaction method. BLFT-PT ceramics exhibit the dominant rhombohedral structure for x ≤ 0.08, which transfer to the tetragonal phases with further ncreasing the Ti concentration. However, the second phases are detected for BLFT-PT of x ≥ 0.1. Upon using the Ti substitution, the ac (alternating current) conductivity σac of BLFT-PT ceramics is significantly reduced at the elevated temperatures. The remnant polarization Pr and piezoelectric constant d33 of BLFT-PT are enhanced by the Ti substitution, reaching the maximum of Pr=46 μC/cm2 and d33=262 pC/N for x=0.05. Our results indicate that BLFT-PT is an alternative multiferroic candidate with excellent piezoelectric properties.
Jianguo Chen Guiyang Shi Shengwen Yu Jinrong Cheng
School of Materials Science and Engineering,Shanghai University,149 Yanchang Road Shanghai,200072,China
国际会议
西安
英文
91-94
2009-08-23（万方平台首次上网日期，不代表论文的发表时间）