Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17146
Title: Fabrication and properties of cobalt ferrite/lead lanthanum zirconate titanate 0-3 composites via modifying phase boundary
Authors: Shi, DL
Li, K
Li, H
Wang, Q
Wang, Y 
Chan, HLW 
Keywords: Core-shell structure
ME coefficient
ME composites
Sol-gel methods
Issue Date: 2012
Publisher: 中国学术期刊(光盘版)电子杂志社
Source: 功能材料 (Journal of functional materials), 2012, v. 43, no. SUPPL. 2, p. 326-330 How to cite?
Journal: 功能材料 (Journal of functional materials) 
Abstract: The cobalt ferrite (CFO) powders were coated with zirconia via sol-gel methods to form core-shell structures. The Li2WO3 was used as sintering additives to decrease the sintering temperature of the lead lanthanum zirconate titanate (PLZT). Two kinds of powder were well mixed and then pressed to form raw disks. After being co-fired at designed temperature, the xCFO/(1-x)PLZT 0-3 multi-ferroic composites (x=0.1, 0.2, 0.3, 0.4 in weight fraction) were obtained. The effects of the CFO content, phase structure, micro morphology and sintering conditions on the dielectric, piezoelectric and ferroelectric properties were investigated. The X-ray diffraction patterns showed that the composites presented a perovskite structure and a spinel structure of CFO. The SEM micro morphology and energy dispersive spectrometer results showed that the CFO particles were well dispersed in PLZT, the ZrO2 was well coated on the CFO surface and effectively blocked the diffusion of iron and cobalt ions into the PLZT. The magneto-electric coefficient of the CFO/PLZT composite ceramics (x=0.2) which were sintered at 1100°C was found to be 3.53×106mV/(T·cm) at 10 kHz.
URI: http://hdl.handle.net/10397/17146
ISSN: 1001-9731
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