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首页> 外文期刊>Journal of Materials Science >PVDF-ferrite composites with dual magneto-piezoelectric response for flexible electronics applications: synthesis and functional properties
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PVDF-ferrite composites with dual magneto-piezoelectric response for flexible electronics applications: synthesis and functional properties

机译：PVDF-铁氧体复合材料具有双磁压电响应，适用于柔性电子产品应用：合成和功能性质

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摘要

In the present work, a magnetodielectric flexible thick film composite with a quaternary Ba12Fe28Ti15O84 ferrite filler (<= 9 vol%) embedded into PVDF polymer matrix was investigated. The role of filler volume on the macroscopic dielectric, magnetic and ferroelectric properties as well as on the nanoscale magnetic and piezoelectric response was analyzed. The formation of small amounts of polar phases besides the majority alpha-phase of PVDF was shown by XRD and FTIR combined analysis. The electrical properties are dominated by the polymer response, while magnetic order is derived as sum property from the ferrite ones, having a predominant soft magnetic character with small coercivity of H-c similar to 60 Oe and high saturation magnetization of M-s = 2.6 emu/g for the highest concentration of 9 vol%. Permittivity and losses slightly increase with ferrite filler addition, and the composite maintains a dielectric character for all the compositions. Local PFM and MFM investigations have shown a combined ferro/piezoelectric character and magnetic order, with magnetoelectric coupling demonstrated by the reorientation of filler particles and modifications of local piezoresponse when applying a static magnetic field.
机译：在本作工作中，研究了嵌入嵌入到PVDF聚合物基质中的季静脉Ba12Fe28Ti15O84铁氧体填料（<= 9体积％）的磁铁柔性厚膜复合物。分析了填料对宏观电介质，磁性和铁电性能以及纳米级磁性和压电反应的作用。通过XRD和FTIR组合分析显示了除了PVDF的大多数α相之外的少量极性相的形成。电性能由聚合物反应支配，而磁性阶源自来自铁氧体响应的磁场，其具有与HC的小矫顽力具有相似的矫顽力，类似于60 OE和MS = 2.6 emu / g的高饱和磁化。最高浓度为9体积％。用铁氧体填充剂添加介电常数和损耗略微增加，并且复合材料保持所有组合物的介电特征。本地PFM和MFM研究已经示出了磁电耦合的组合的铁电耦合，通过填充颗粒的重新定向和施加静电磁场时的局部压电响应的修改。

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