| ZnO/BaTiO3纳米复合材料的制备及其发光性质 |
| |
| 引用本文： | 姚礼,杨碚芳.ZnO/BaTiO3纳米复合材料的制备及其发光性质[J].无机材料学报,2003,18(2):367. |
| |
| 作者姓名： | 姚礼 杨碚芳 |
| |
| 作者单位： | 中国科学技术大学1. 中国科学院结构分析开放研究实验室材料科学与工程系; 材料科学与工程系, 合肥 230026 |
| |
| 摘 要： | 采用溶胶-凝胶技术制备了ZnO/BaTiO3纳米复合材料,用X射线衍射仪(XRD)、透射电子显微镜(TEM)测定了不同温度处理后样品的组成、结构、形貌和尺寸.对复合材料室温下的光致发光谱分析发现,复合材料的发光强度比纯的纳米ZnO发光显著增强;纳米ZnO中氧空位引起的510nm发光带的峰位随着热处理温度的不同而分别出现蓝移和红移现象.其中蓝移主要是量子尺寸效应引起的,而红移则可能与致密化的BaTiO3所提供的高介电场有关.
|
| 关 键 词： | ZnO BaTiO3 纳米复合 光致发光 |
| 收稿时间： | 2002-01-14 |
| 修稿时间： | 2002-03-07 |
Preparation and Photoluminescence Properties of ZnO/BaTiO3 Nanocomposite System |
| |
| YAO Li,YANG Bei-Fang.Preparation and Photoluminescence Properties of ZnO/BaTiO3 Nanocomposite System[J].Journal of Inorganic Materials,2003,18(2):367. |
| |
| Authors: | YAO Li YANG Bei-Fang |
| |
| Affiliation: | University of Science and Technology of China 1. Structure Research Laboratory; 2. Department of Materials Science and Engineering; Hefei 230026; China |
| |
| Abstract: | The ZnO/BaTiO3 nanocomposite system was prepared by a sol-gel method. The particle size, structure and phases of the nanocomposite were studied by XRD and TEM. In addition, enhanced photoluminescence of the nanocomposite under 370nm light excitation was observed at room temperature. The blue-green emission peak induced by oxygen vacancies of nano-ZnO particles, has blue-shift or red-shift with different heat-treatment temperatures, the blue-shift is assigned to quantum size effect, and the red-shift is attributed to the high dielectric environment effects of the BaTiO3 matrix. |
| |
| Keywords: | ZnO BaTiO3 |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《无机材料学报》浏览原始摘要信息 |
|
点击此处可从《无机材料学报》下载全文 |
