Magnetoelectric effect of CoFe2O4/Pb(Zr,Ti)O3 composite ceramics sintered via spark plasma sintering technology
Magnetoelectric effect of CoFe2O4/Pb(Zr,Ti)O3 composite ceramics sintered via spark plasma sintering technology
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DOI：
10.1016/j.ceramint.2015.01.088
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发表时间：
2015-06
影响因子：
5.2
通讯作者：
P. Peng;Yaping Hu;Yong Liu;Shi Chen;Jing Shi;R. Xiong;Yue Zhang
中科院分区：
文献类型：
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作者：
P. Peng;Yaping Hu;Yong Liu;Shi Chen;Jing Shi;R. Xiong;Yue Zhang
采用放电等离子烧结（SPS）方法制备了不同配比的CoFe2O4（CFO）和Pb（Zr，Ti）O3（PZT）磁电陶瓷复合材料。陶瓷的组成和形貌的表征揭示了均匀分布的CFO和PZT相。物理性能测试表明，当CFO质量分数从8%增加到15%时，压电常数和介电常数单调下降，而饱和磁化强度和介电损耗增大。结果表明，当CFO质量分数为10%或更低时，在外加磁场作用下，极化行为发生显著变化，ME转换电压系数（αE）明显提高。相比之下，CFO质量百分比大于10%具有降低的αE，并且它们的极化行为不受施加的磁场的影响。随着CFO含量的增加，α E先增大后减小。α E的最大值指示了CFO的最佳比例（10%），这归因于CFO的添加在复合材料中改善的磁致伸缩和劣化的电行为之间的竞争。
Magnetoelectric (ME) ceramic composites of CoFe2O4(CFO) and Pb(Zr,Ti)O3(PZT) with varied composition ratios were sintered using a spark plasma sintering (SPS) method. The characterization of the ceramic compositions and morphologies revealed an even distribution of the CFO and PZT phases. Physical property measurements showed that when the CFO mass percent increased from 8% to 15%, the piezoelectric constant and dielectric constant decreased monotonously, while the saturation magnetization and dielectric loss were enhanced. It was determined that a CFO mass percent of 10% or less resulted in a significant change of the polarization behaviour and a clear enhancement of the ME conversion voltage coefficient (αE) with an applied magnetic field. In contrast, CFO mass percentages greater than 10% had a reducedαE, and their polarization behaviour was not influenced by an applied magnetic field. With an increasing proportion of CFO in the composite, theαEfirst increased and then decreased. The maximum value of theαEindicated an optimal proportion of CFO (10%), which is attributed to a competition between the improved magnetostriction and deteriorating electric behaviour in the composite with the addition of CFO.