| Study on BSTO/MgO Ferroelectric Materials for Phase Shift Doped with Rare Earth Oxides |
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| 作者姓名： | 杨春霞 周洪庆 刘敏 吴红忠 |
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| 作者单位： | College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China，College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China，College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China，College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China |
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| 基金项目： | Acknowledgements： The authors would like to thank the assistance from the Applied Magnetics Branch, Nanjing Research Institute of Electronics Technology. Yang C X would also like to thank Director Jiang W B for his generous help. |
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| 摘 要： | Phasedarrayantennascansteerthetransmitted orreceivedsignalswiththeadvantagesoffastscan ning,multipletargetstrackingandgoodanti jam ming.Theseantennasarecurrentlyconstructedusing ferritephaseshiftingelements,whicharecostly,large andheavy.Therefore,theirmil…
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| 关 键 词： | 铁电物质 稀土 氧化物 微波 绝缘体 |
| 文章编号： | 1002-0721（2005）05-0546-05 |
| 收稿时间： | 2004-11-12 |
| 修稿时间： | 2005-01-20 |
Study on BSTO/MgO Ferroelectric Materials for Phase Shift Doped with Rare Earth Oxides |
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| Yang Chunxia,Zhou Hongqing,Liu Min,Wu Hongzhong.Study on BSTO/MgO Ferroelectric Materials for Phase Shift Doped with Rare Earth Oxides[J].Journal of Rare Earths,2005,23(5):546-550. |
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| Authors: | Yang Chunxia Zhou Hongqing Liu Min Wu Hongzhong |
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| Abstract: | Barium strontium titanate/magnesia (BSTO/MgO) ferroelectric materials for phase shift were prepared by traditional ceramic process-solid phase synthesis. The effects of various rare earth oxides of 0.5% on dielectric behaviors of BSTO/MgO composites were studied in terms of permittivity, loss tangent and tunability both at low and high frequencies. The dielectric constant of Y2O3 and Er2O3 doped samples decreases from 160 to 120, and the microwave loss of La2O3 and Er2O3 doped samples decreases from 8.2×10-3 to 6.8×10-3. Only La2O3 increases the tunability of BSTO/MgO system, from 13.6% to 14.8%. For the La2O3 doped sample, the value of tunability is more than 14% with the external DC field 4000 V*mm-1 and the microwave loss at 2.47 GHz is 6.77×10-3 and, hence, it can basically meet the requirements of phase shifters working at microwave frequencies. The influence mechanism was discussed preliminarily. |
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| Keywords: | barium strontium titanate/magnesia phase shifter dielectric property rare earths |
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