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无机材料学报

无机材料学报

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BST/YIG复合材料的相结构、介电性能和磁性能的研究

李 翔， 严 彪， 董 刚， 赵慎强, 梁小伟   

  1. 同济大学 材料科学与工程学院，上海市金属功能材料开发应用重点实验室， 上海 200092
  • 收稿日期:2008-07-01 修回日期:2008-09-09 出版日期:2009-03-20 网络出版日期:2009-03-20

Study on Phase Structure, Dielectric and Magnetic Properties of BST/YIG Composites

LI Xiang， YAN Biao， DONG Gang, ZHAO Shen-Qiang, LIANG Xiao-Wei   

  1. Shanghai Key Lab of Metal Functional Materials, School of Materials Sciences and Engineering, Tongji University, Shanghai 200092, China
  • Received:2008-07-01 Revised:2008-09-09 Published:2009-03-20 Online:2009-03-20

PDF (PC)

2483

被引次数

4 | 1

摘要： 以铁电性的钛酸锶钡（BST）和铁磁性钇铁氧体（YIG）为原料，采用固相反应法，合成了一系列铁电/铁磁复合材料，并对铁电/铁磁复合材料（YIG/BST）的介电性能和磁性能进行了详细地研究. 结果表明：在一定温度下烧结所得的铁电/铁磁复合材料，由铁电相和铁磁相两相组成；xBST-(1-x)YIG(x=0，0.1，0.2，0.3，0.4，0.5，0.6，0.7，0.8，0.9，1.0)复合材料具有良好的介电性能和磁性能, 其介电常数实部ε′与虚部ε″均随BST含量的增加而升高，且介电常数的谐振峰随着YIG含量的增加而向频率高的方向移动.磁导率实部μ′与虚部μ″均随BST含量的增加而降低. 在YIG铁氧体中加入适量的陶瓷BST构成复合材料，可以有效地改善截止频率，提高高频电磁特性.

关键词: 铁电/铁磁复合材料, 钛酸锶钡, 钇铁氧体, 电感, 电容

Abstract: A series of composites were synthesized by solidstate reaction, with ferroelectric powder of BST and ferromagnetic powder of YIG as raw materials. Dielectric and magnetic properties of ferroelectricferromagnetic composites were tested. The results show that the ferroelectric/ferromagnetic composites sintered at proper temperature consist of ferroelectric phase and ferromagnetic phase. The composite materials xBST-(1-x)YIG(x=0，0.1，0.2，0.3，0.4，0.5，0.6，0.7，0.8，0.9，1.0) exhibit excellent dielectric and magnetic properties. Both ε′ and ε″ increase with the increase of BST content, and the dielectric resonant frequency shifts to a higher frequency with YIG content increasing. The permeability rises with BST content decreasing. The resonance frequency and high frequency characteristics of YIG are improved by adding BST.

Key words: ferroelectric/ferromagnetic composites, BST, YIG, inductance, capacitance

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