用正电子湮没技术,结合X射线衍射结构分析,对掺杂Y2O3的ZnO导电陶瓷烧结过程进行了研究,给出了掺杂含量、烧结温度和烧结时间对材料结构的影响特征,研究发现:Y2O3掺杂量增加,ZnO导电陶瓷材料完整性变差;烧结温度升高,ZnO陶瓷产生微空洞为主的缺陷;烧结时间增加,微空洞缺陷数目明显增加.同时对正电子湮没机制与ZnO陶瓷导电特性的关联进行了研究.
参考文献
| [1] | Callaway J;Wang C S .Energy bands in ferromagnetic iron[J].Physical Review,1977,B16:2095-2099. |
| [2] | 石康源;张绪礼;王筱珍 等.ZnO导电陶瓷的微观结构与导电机理[J].功能材料,1996,27(01):61-63. |
| [3] | Mattocks P G .Alphen effect and Fermi surface of yttrium[J].Journal of Physics,1992,F8:1417-1419. |
| [4] | Rober J L .Fabrication of high-fields zinc oxide varistors by sol-gel processing[J].American Ceramic Society Bulletin,1984,63(02):278-281. |
| [5] | Kuramoto E .Positron annihilation in niobium containing microvoids[J].Radiation Effects,1996,8(02):433-436. |
| [6] | Collect J .Picosecond spectroscope of excitons and biexcitons in ZnO at high density[J].Physical Review,1986,B33:4129-4135. |
| [7] | 袁方利 .ZnO基陶瓷的导电性能研究[J].功能材料,1998,29(06):592-595. |
| [8] | Shang Jiaxiang .Positron annihilation in ZnO varistors with various composition and technique[J].Materials Science,1995,175:521-524. |
| [9] | Shunichi et al.Zinc oxide varistors made from powder prepared by amine processing[J].Journal of the American Ceramic Society,1989,72(02):338-340. |
| [10] | Anderson M T et al.Structural similarities among oxygen-deficient perovskites[J].Chemistry of Materials,1993,5:151-165. |
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