无机材料学报2011，Vol.26Issue(5)：486-490,5.DOI:10.3724/SP.J.1077.2011.00486
相扩散阻挡法制备铁酸钴/改性钛酸铋钠0-3复合多铁性陶瓷
Fabrication of the Cobalt Ferrite/Modified Sodium Bismuth Titanate 0-3 Multiferroic Composites via Diffusion-blocking
摘要
Abstract
The ZrO2 buffer layer was coated on CoFe2O4(CFO) powder via a Sol-Gel method. The coated CFO and 0.92(Bi0.5Na0.5)TiO3-0.02(Bi0.5K0.5)TiO3-0.06BaTiO3(BNBT) ceramic powder were mixed according to the chemical formula of xCFO/(1-x) BNBT (weight fraction x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30). Using polyvinyl alcohol (PVA) as binder, the mixture was pressed into disks. After sintered at 1050℃, the xCFO/(1-x) BNBT 0-3 composite ceramic disks were prepared. The X-ray diffraction results show that the ZrO2 layer can buffer the Fe3+and Co2+ ions diffusing from CFO to BNBT during the sintering process. The break-down voltage of the co-fired composites is measured to be 75kV/cm. It is found that the piezoelectric constant, electromechanical coefficient,remnant polarization and dielectric permittivity decrease as the CFO content increasing. Magnetoelectric coefficient (ME) and dielectric loss increase with the CFO content increasing. For a composite disk with dimension of Φ35mm × 1.5mm, the ME coefficient at resonance frequency of 90 kHz is 1.39V/A under a DC magnetic bias of 199 kA/m.关键词
磁电效应/0-3复合/铁电/铁磁Key words
magnetoelectric/ 0-3 composite/ ferroelectric/ ferromagnetic分类
数理科学引用本文复制引用
韩权威,李坤,彭松,王雨,陈王丽华..相扩散阻挡法制备铁酸钴/改性钛酸铋钠0-3复合多铁性陶瓷[J].无机材料学报,2011,26(5):486-490,5.基金项目
Hong Kong PolyU Project,NSFC/RGC N-PolyU501/08 ME Device （）
