| 一次烧成SrTiO3复合功能陶瓷中掺杂Ag+离子的行为及其机制 |
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| 引用本文： | 徐庆,陈文,袁润章. 一次烧成SrTiO3复合功能陶瓷中掺杂Ag+离子的行为及其机制[J]. 功能材料, 2001, 32(3): 312-314 |
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| 作者姓名： | 徐庆 陈文 袁润章 |
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| 作者单位： | 1. 武汉工业大学,材料科学与工程学院,
2. 武汉工业大学, |
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| 基金项目： | 武汉工业大学材料复合新技术国家重点实验室开放基金资助项目 |
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| 摘 要： | 采用一次烧成工艺制备掺施主杂质Nb2O5和受主杂质Ag2O的SrTiO3电容－压敏复合功能陶瓷,分析了Ag2O掺杂对SrTiO3电容－压敏复合功能陶瓷,分析了Ag2O掺杂对SrTiO3陶瓷电学性能的影响,采用XPS和EPMA分析方法确定了Ag的结构状态。研究结果表明,Ag^ 离子存在于烧结助剂形成的晶界非晶相中,对SrTiO3晶粒的半导化状况未产生显著影响,吕Ag^ 离子低价取代晶粒表面的Sr^2 离子而形成晶界受主态,是产生晶界Schottky势垒及复合功能效就原重要原因。
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| 关 键 词： | 复合功能陶瓷 一次烧成 掺杂 钛酸锶 银离子 |
| 文章编号： | 1001-9731(2001)03-0312-03 |
| 修稿时间： | 2000-03-16 |
Behavior and its mechanism for doped Ag+ ion in single-sintered SrTiO3 multifunction ceramics |
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| XU Qing,CHEN Wen,YUAN Run-zhang. Behavior and its mechanism for doped Ag+ ion in single-sintered SrTiO3 multifunction ceramics[J]. Journal of Functional Materials, 2001, 32(3): 312-314 |
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| Authors: | XU Qing CHEN Wen YUAN Run-zhang |
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| Abstract: | SrTiO3 multifunction ceramics with Nb2O5 and Ag2O doped as donor dopant and acceptor dopant respectively is fabricated by a single-sintering process. The influence of doped Ag2O on the electrical properties of SrTiO3 ceramics are analyzed, while the structural condition of Ag is ascertained by XPS and EPMA. The results show that Ag+ ion distribute in grain-boundary amorphous phase originating from the melting of the sintering aids at high temperature, for which no remarkable influence on semi-conducting condition is observed in response to the doped Ag+ ion. The formation of grain-boundary acceptor state, due to the substitution of Sr2+ ion on grain surface by the diffused Ag+ ion during the oxidizing annealing, plays an important role in the generation of Schottky barrier and resultant multifunction effect. |
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| Keywords: | SrTiO3 ceramics multifunction single-sintering process doped Ag+ ion |
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