Preparation and properties of BaTiO3/ CoFe2O4 composite ceramics

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI:10.1109/SPAWDA.2011.6167249

Lin-lin Liu, Yiping Wang, W. Qian, B. Wang, Ying Yang

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Abstract

In this study, we report a general process to prepare BaTiO3, CoFe2O4 nanoparticles and other oxides nanoparticles with complex compositions. BaTiO3, CoFe2O4 nanoparticles with particle size less than 50nm were fabricated by a surfactant-assisted ball milling process followed a centrifugal separation. Furthermore, ferroelectric/ferrite composites of (1−x) BaTiO3/xCoFe2O4 (x=0.1, 0.2, 0.3, 0.5) ceramics were then synthesized. The dependence of the ferroelectric and magnetic properties on the content of CoFe2O4 has been investigated systematically. No interface reaction was observed in the multiferroic ceramics and the samples have been confirmed with excellent ferroelectric and ferromagnetic properties, of which the maximal remnant polarization value of 1.9µC/cm² and saturation magnetization of 35emu/g were measured at 10% and 30% of CoFe2O4, respectively. The dielectric properties of the composites have also been measured as the variation of ferroelectric/magnetic fractions.

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BaTiO3/ CoFe2O4复合陶瓷的制备及性能研究

在本研究中，我们报道了制备BaTiO3、CoFe2O4纳米粒子和其他复合成分的氧化物纳米粒子的一般工艺。采用表面活性剂辅助球磨工艺，离心分离制备了粒径小于50nm的BaTiO3、CoFe2O4纳米颗粒。此外，还合成了(1−x) BaTiO3/xCoFe2O4 (x=0.1, 0.2, 0.3, 0.5)陶瓷的铁电/铁氧体复合材料。系统地研究了CoFe2O4含量对铁电性能和磁性能的影响。在CoFe2O4含量为10%和30%时，样品的最大剩余极化值为1.9 μ C/cm2，饱和磁化强度为35emu/g。复合材料的介电性能也被测量为铁电/磁性分数的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)

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