聚吡咯-钴锌铁氧体复合材料的制备及性能<sup>*</sup>

doi:10.11901/1005.3093.2013.665

材料研究学报

2014, Vol. 28

Issue (3): 180-184 DOI: 10.11901/1005.3093.2013.665

本期目录 | 过刊浏览

聚吡咯-钴锌铁氧体复合材料的制备及性能^*

马瑞廷,何玲,王晓,赵海涛(

)

沈阳理工大学材料科学与工程学院沈阳 110159

Preparation and Properties of Polypyrrole-Co_0.5Zn_0.5Fe₂O₄ Composites

Ruiting MA,Ling HE,Xiao WANG,Haitao ZHAO(

)

School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159

引用本文:

马瑞廷,何玲,王晓,赵海涛. 聚吡咯-钴锌铁氧体复合材料的制备及性能^*[J]. 材料研究学报, 2014, 28(3): 180-184.
Ruiting MA, Ling HE, Xiao WANG, Haitao ZHAO. Preparation and Properties of Polypyrrole-Co_0.5Zn_0.5Fe₂O₄ Composites[J]. Chinese Journal of Materials Research, 2014, 28(3): 180-184.

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摘要:

用聚丙烯酰胺凝胶法制备纳米Co_0.5Zn_0.5Fe₂O₄铁氧体, 再用原位聚合法制备聚吡咯-钴锌铁氧体(PPy-Co_0.5Zn_0.5Fe₂O₄)复合材料。使用X射线衍射仪(XRD)和扫描电子显微镜(SEM)表征了复合材料的结构和形貌, 用振动样品磁强计(VSM)和矢量网络分析仪测试了复合材料的磁性能和介电性能。结果表明: 样品为纯PPy和PPy-Co_0.5Zn_0.5Fe₂O₄, 平均粒径分别约为200 nm和180 nm; Co_0.5Zn_0.5Fe₂O₄的磁化强度(M_s)和剩余磁化强度(M_r)分别为65.95 emu/g和15.44 emu/g, 均大于PPy-Co_0.5Zn_0.5Fe₂O₄, 但矫顽力(H_c)为153.51 Oe, 小于PPy-Co_0.5Zn_0.5Fe₂O₄; PPy的介电损耗(tanε=ε''/ε')大于PPy-Co_0.5Zn_0.5Fe₂O₄, 反射损耗小于PPy-Co_0.5Zn_0.5Fe₂O₄, 这是Co_0.5Zn_0.5Fe₂O₄的引入所致; 在频率为15.2 GHz处, PPy-Co_0.5Zn_0.5Fe₂O₄复合材料的反射损耗达到最大值-16.4 dB, 频带宽为2.5 GHz。

关键词 ：复合材料, 聚吡咯-Co_0.5Zn_0.5Fe₂O₄, 磁性能, 反射损耗

Abstract：

Nanocrystallined cobalt zinc ferrite was prepared by polyacrylamide gel process, and then the polypyrrole (PPy)-cobalt zinc ferrite composites were synthesized by in-situ chemical polymerization. The microstructure and morphology of the composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The magnetic and microwave dielectric properties of the composites were measured by vibrating sample magnetometer (VSM) and vector network analyzer of E5071C. The results show that the products are composites consisted of pure PPy and PPy-Co_0.5Zn_0.5Fe₂O₄, and the average particle sizes of PPy and PPy-Co_0.5Zn_0.5Fe₂O₄are about 200 nm and 180 nm, respectively. The saturation magnetization (M_s) and remanent magnetization (M_r) of the Co_0.5Zn_0.5Fe₂O₄ are 65.95 emu/g and 15.44 emu/g, respectively, and they are greater than that of PPy-Co_0.5Zn_0.5Fe₂O₄, but the coercive force (H_c) of the Co_0.5Zn_0.5Fe₂O₄ is smaller than that of PPy-Co_0.5Zn_0.5Fe₂O₄. Owing to the introduction of Co_0.5Zn_0.5Fe₂O₄ ferrites into the PPy matrix, the dielectric loss (tanε=ε''/ε') of the PPy is greater than that of the PPy-Co_0.5Zn_0.5Fe₂O₄, but the reflection loss of the PPy is smaller than that of the PPy-Co_0.5Zn_0.5Fe₂O₄. The maximum reflection loss of the PPy–Co_0.5Zn_0.5Fe₂O₄ composite is about -16.4 dB at 15.2 GHz with a bandwidth of 2.5 GHz.

Key words： composites PPy-Co_0.5Zn_0.5Fe₂O₄ magnetic properties reflection loss

收稿日期: 2013-09-13

基金资助:* 国家自然科学基金51303108 和沈阳市国际科技合作122218 资助项目。

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本文联系人: 赵海涛

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https://www.cjmr.org/CN/10.11901/1005.3093.2013.665 或 https://www.cjmr.org/CN/Y2014/V28/I3/180

图1 PPy(a), PPy-Co0.5Zn0.5Fe2O4(b)和Co0.5Zn0.5Fe2O4(c)复合材料的XRD谱

图2 PPy和PPy-Co0.5Zn0.5Fe2O4复合材料的SEM像

图3 PPy和PPy-Co0.5Zn0.5Fe2O4复合材料的磁滞回线

表1 Co0.5Zn0.5Fe2O4和PPy-Co0.5Zn0.5Fe2O4复合材料的磁性参数

图4 PPy和PPy-Co0.5Zn0.5Fe2O4复合材料的介电损耗曲线

图5 PPy和PPy-Co0.5Zn0.5Fe2O4复合材料的反射损耗曲线

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