Sb掺杂BaTiO_3的电磁及微波吸收特性研究  

Electromagnetic and microwave absorption properties of Sb doped BaTiO_3

作　　者：郝建伟[1,2] 余洪滔[1,2] 徐光亮[1,2] 任小虎[1,2] 

机构地区：[1]四川省非金属复合与功能材料重点实验室--省部共建国家重点实验室培育基地,四川绵阳62l01O [2]西南科技大学材料科学与工程学院新材料研究所,四川绵阳621010

出　　处：《电子元件与材料》2012年第6期15-18,共4页Electronic Components And Materials

基　　金：四川省教育厅重点资助项目(No.08ZA009);西南科技大学博士研究基金资助项目(No.08ZX0102),西南科技大学博士研究基金资助项目(No.09ZX7104)

摘　　要：以BaCO3、TiO2、Sb2O3为原料,采用固相法制备了Sb掺杂BaTiO3样品,借助XRD、Raman光谱以及矢量网络分析仪等分析测试手段对所制样品的晶相、晶格常数、电磁性能及微波吸收特性进行了表征。结果表明:低掺杂Sb的样品均为单一四方相BaTiO3晶体,结晶良好;随着w(Sb2O3)的增大,晶格常数减小;与未掺杂的BaTiO3相比,Sb掺杂BaTiO3的反射损耗明显提高,且反射峰向低频方向偏移;当w(Sb2O3)为0.6%时,制得BaTiO3的反射损耗在3.7 GHz处达到最大值–28.2 dB。Sb doped barium titanate were prepared by solid reaction method, using BaCO3, TiO2 and Sb203 as raw materials. The crystal Structure, lattice constants, electromagnetic properties and microwave absorption characteristics of the prepared samples were characterized by XRD, Raman spectroscopy and vector network analyzer, respectively. The results show that tetragonal barium titanate crystals fabricated with a lower Sb doping crystallize well. The grain sizes and lattice constants decrease with the increasing of w（Sb203）. Moreover, compared with the undoped BaTiO3, the reflection loss of the Sb-doped samples improves obviously, and the reflection peak positions shift to low frequency. When the w（Sb203） is 0.6%, the obtained BaTiO3 exhibits the maximium reflection loss of-28.2 dB at 3.7 GHz.

关 键 词：BATIO3 掺杂改性 电磁参数 反射损耗 

分 类 号：TB34[一般工业技术—材料科学与工程]