| Ho掺杂BaTiO_3陶瓷的制备及其正电子湮没研究 |
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| 引用本文： | 李涛,常方高,葛永霞,李喜贵.Ho掺杂BaTiO_3陶瓷的制备及其正电子湮没研究[J].河南师范大学学报(自然科学版),2006,34(1):43-46. |
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| 作者姓名： | 李涛 常方高 葛永霞 李喜贵 |
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| 作者单位： | 河南师范大学,物理与信息工程学院,河南,新乡,453007 |
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| 摘 要： | 采用固相反应法制备了掺杂不同量Ho2O3的Ba1-xHoxTiO3陶瓷(x分别为:0,0.2%,0.3%,0.4%,0.5%,0.6%,0.7%);对其室温电阻率进行了测量,结果显示其室温电阻率随掺杂量增加呈U型变化曲线;借助XRD物相分析手段对所制备样品进行了研究,表明其结构均为钙钛矿结构;采用正电子寿命谱学的方法研究了不同掺杂量Ho2O3所引起的结构缺陷.
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| 关 键 词： | 陶瓷 掺杂 结构缺陷 正电子寿命 |
| 文章编号： | 1000-2367(2006)01-0043-04 |
| 收稿时间： | 2005-04-07 |
| 修稿时间： | 2005年4月7日 |
PAT Studies of Donor-Doped BaTiO3 Ceramics |
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| LI Tao,CHANG Fang-gao,GE Yong-xia,LI Xi-gui.PAT Studies of Donor-Doped BaTiO3 Ceramics[J].Journal of Henan Normal University(Natural Science),2006,34(1):43-46. |
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| Authors: | LI Tao CHANG Fang-gao GE Yong-xia LI Xi-gui |
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| Institution: | College of Physics and Information Engineering, Henan Normal University,Xinxiang 45300 7,China |
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| Abstract: | Ba_(1-x)Ho_xTiO_3ceramics were prepared using raw materials of BaCO_3,TiO_2(>99%) and Ho_2O_3(>99.99%)(x=0,0.2%,0.3%,0.4%,0.5%,0.6%,.0.7%),XRD analysis indicates that the crystal structure of all the samples is perovskite structure.The room-temperature resistivity of Ba_(1-x)Ho_xTiO_3 ceramics was measured.The results show that the resistivity is correlated to Ho content,with a " U" shape curve;positron lifetime spectra were performed for BaTiO_3 doped with Ho_2O_3 and the correlation between the defects and doped content was investigated. |
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| Keywords: | ceramics donor structure defects positron lifetime |
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