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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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原位聚合法制备聚吡咯-钴铜锌铁氧体复合材料及其电磁性能
DOI: 10.11777/j.issn1000-3304.2014.14032, PP. 1364-1368
Keywords: 复合材料,铁氧体,介电性能,磁性能
Abstract:
采用自蔓延燃烧法和原位聚合法分别制备纳米Co0.7Cu0.1Zn0.2Fe2O4铁氧体和聚吡咯(PPy)-Co0.7Cu0.1Zn0.2Fe2O4纳米复合材料.采用X射线衍射仪(XRD)、透射电子显微镜(TEM)和傅里叶红外光谱(FTIR)对材料的结构和形貌进行表征,使用波导法和振动样品磁强计(VSM)研究了材料的介电性能、微波吸收性能和磁性能.结果表明,制得了纯相的尖晶石结构Co0.7Cu0.1Zn0.2Fe2O4铁氧体,少量Cu2+离子替代了铁氧体八面体位置上的Co2+离子,使得材料的晶格常数减小;2种粉体粒子分散性较好,它们的平均粒径分别约为15nm和50nm;在5.0~20.0GHz频率范围内,PPy-Co0.7Cu0.1Zn0.2Fe2O4复合材料的反射损耗在-16.25dB到-20.27dB之间,且在18GHz处出现极大值-20.27dB,带宽为2.0GHz(最强峰的半高宽),PPy-Co0.7Cu0.1-Zn0.2Fe2O4复合材料的反射损耗明显大于铁氧体;PPy-Co0.7Cu0.1Zn0.2Fe2O4的饱和磁化强度(Ms)和剩余磁化强度(Mr)分别为12.9A/g和4.29A/g,小于Co0.7Cu0.1Zn0.2Fe2O4铁氧体的相应值,但复合材料的矫顽力大于Co0.7Cu0.1Zn0.2Fe2O4铁氧体的,为38.96kA/m.
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