| 掺杂SrTiO_3陶瓷的介电性及正电子湮没 |
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| 引用本文： | 唐超群,智宇,张绪礼. 掺杂SrTiO_3陶瓷的介电性及正电子湮没[J]. 华中科技大学学报(自然科学版), 1991, 0(5) |
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| 作者姓名： | 唐超群 智宇 张绪礼 |
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| 作者单位： | 华中理工大学物理系(唐超群)，华中理工大学固体电子学系(智宇)，华中理工大学固体电子学系(张绪礼) |
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| 基金项目： | 煤燃烧国家重点实验室部分资助 |
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| 摘 要： | 本文应用正电子湮没寿命谱方法研究掺杂SrTiO_3陶瓷的介电性.通过对不同掺La量SrTiO_3的介电常数、损耗因子、正电子在样品中的湮没寿命的测量,发现介电常数、损耗因子随掺La量的变化与正电子寿命参量的变化存在着某种关系;文中用Sr空位及La离子与Sr空位缔合体模型解释了这些变化与关系.
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| 关 键 词： | 正电子湮没 SrTiO_3陶瓷 介电性 Sr空位 缔合体 |
The Dielectric Property and Positron Annihilation in Doped SrTiO_3 Ceramics |
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| Tang Chaoqun Zhi Yu Zhang Xuli. The Dielectric Property and Positron Annihilation in Doped SrTiO_3 Ceramics[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 1991, 0(5) |
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| Authors: | Tang Chaoqun Zhi Yu Zhang Xuli |
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| Affiliation: | Tang Chaoqun Zhi Yu Zhang Xuli |
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| Abstract: | The effect of doping on the dielectric property of La-doped SrTiO3 ceramics is studied by the positron lifetime technique. The measurement of the dielectric property shows that with an increase in the La content x (in% mol), the dielectric constant and the tangent of dielectric loss angle (tg) have a peak within the range 0l, and the intensity I2 varies oppositely to 2. The positron experiment results show that the concentration of donor La and Sr vacancy increases for 01. The variation of the dielectric property is explained with the variation of donor La, Sr vacancy and La ion+Sr vacancy complex. |
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| Keywords: | Positron annihilation SrTiO3 ceramics Dielectric property Sr vacancy Complex |
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