| BaTiO3基PTCR陶瓷中Bi2O3蒸汽掺杂和Mn的协同作用 |
| |
| 引用本文： | 齐建全,桂治轮,李龙土. BaTiO3基PTCR陶瓷中Bi2O3蒸汽掺杂和Mn的协同作用[J]. 功能材料, 2002, 33(1): 86-87 |
| |
| 作者姓名： | 齐建全 桂治轮 李龙土 |
| |
| 作者单位： | 清华大学材料系,北京,100084 |
| |
| 摘 要： | BaTiO3基陶瓷材料的PTCR效应与施受主掺杂密切相关。通过BaTiO3、Sb2O3等蒸汽掺杂，材料的PTCR效应可以得到提高。然而，蒸汽掺杂之后，PTCR效应提高的幅度在含受主Mn的材料中比纯施主掺杂的材料中要大得多。这与BaTiO3蒸汽掺杂和Mn协同作用密切相关。这种协同作用可能进一步形成三阶Mn或中性钡缺位相关的更为稳定的复合缺陷，从而增大了电子捕获中心的浓度，使材料PTCR效应大幅提高。
|
| 关 键 词： | PTCR 蒸汽掺杂 锰 钛酸钡 陶瓷半导体 |
| 文章编号： | 1001-9731(2002)01-0086-02 |
| 修稿时间： | 2000-10-31 |
Coordinated function of Bi2 O3 vapor dopant and Mn acceptor in BaTiOa-based PTCR ceramics |
| |
| QI Jian-quan,GUI Zhi-lun,LI Long-tu. Coordinated function of Bi2 O3 vapor dopant and Mn acceptor in BaTiOa-based PTCR ceramics[J]. Journal of Functional Materials, 2002, 33(1): 86-87 |
| |
| Authors: | QI Jian-quan GUI Zhi-lun LI Long-tu |
| |
| Abstract: | The PTCR effect of BaTiO3-based semiconducting ceramics was allied to donor and acceptor impurities. It could be enhanced by some vapor dopants such as Bi2O3 etc. However, the enhancement of the sample doped with Mn is much greater than that of the sample doped by pure donor. The result is associated with the coordinated function of Bi2O3 vapor dopant and Mn acceptor at grain boundary in BaTiO3 ceramics. More stable composite defects could be formed in the sample doped by both Bi2O3 vapor and Mn acceptor, and they were related to trivalent Mn ion and neutral barium vacancy. Therefore, the concentration of free electron capture center is increased, and the PTCR effect could be enhanced greatly. |
| |
| Keywords: | BaTiO3 PTCR Mn vapor doping |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
