用改善的溶胶凝胶法制备铈掺杂钛酸锶钡(Ba_0.6Sr_0.4TiO_3, BST)薄膜,研究其结构与介电性能.X射线光电子能谱表明,铈掺杂显著地减少了薄膜表面非钙钛矿结构.但是,由于掺杂薄膜较薄且掺杂量小,X射线衍射结果未见明显变化.原子力显微镜结果表明,掺杂BST薄膜表面光滑致密.掺杂BST薄膜的介电性能大幅度提高,在40 V外加电压下介电调谐率达60.8%,零偏压下的介电损耗为0.0265.同时,就有关结构及介电性能改善的机制进行了讨论.
Cerium (Ce)-doped barium strontium titanate (Ba0.6Sr0.4TiO3, BST) films were prepared by improved Sol-gel method. The structure and dielectric properties of the films were studied. X-ray diffraction shows the Ce-doped BST films exhibit no obvious change in phase structure because the films are quite thin and the doping content of Ce is low. However X-ray photoelectron spectroscopy shows that the Ce-doped BST films display significant decrease in non-perovskited structure. Atomic force microscope presents that the Ce-doped BST films are smooth and dense. The dielectric properties measurement reveals that the Ce-doped BST films show marked improvement in dielectric properties. The tunability can reach 60.8% at 40 V, and the dielectric loss (tand) is 0.0265 at zero bias. Also, the related mechanism of Ce doping for improvement of structure and dielectric properties is presented.
参考文献
| [1] | Low dielectric loss and enhanced tunability of Ba_(0.6)Sr_(0.4)TiO_(3) based thin films via material compositional design and optimized film processing methods[J].Journal of Applied Physics,2003(11):9218-9225. |
| [2] | Cole M W;Joshi P C;Ervin M H et al.[J].Thin Solid Films,2000,374:34. |
| [3] | 孙建英,翟继卫,丑修建,姚熹.低掺杂量MgO对钛酸锶钡陶瓷的结构和性能的影响[J].功能材料,2007(01):93-96. |
| [4] | Huang Jiquan;Hong Maochun;Jiang Feilong et al.[J].Materials Letters,2008,62:2304. |
| [5] | 廖家轩;李恩求;潘笑风 et al.[J].压电与声光,2008,30(z1):38. |
| [6] | 李恩求;廖家轩 .[J].电子科技大学学报,2008,37(suppl):44. |
| [7] | Kyoung-Tae Kim;Chang-Il Kim .[J].Surface and Coatings Technology,2006,200:4708. |
| [8] | 廖家轩,王洪全,潘笑风,傅向军,张佳,田忠.改进Sol-Gel法制备Y掺杂BST薄膜表面结构及介电性能研究[J].无机材料学报,2009(02):387-391. |
| [9] | 范素华,胡广达,张丰庆,岳雪涛,任艳霞,徐静.镧、铈掺杂对钛酸钡基介电陶瓷性能的影响[J].硅酸盐通报,2006(04):76-79. |
| [10] | 方瑜,肖定全,刘娟妮,朱建国.钛酸锶钡薄膜掺杂改性研究进展[J].材料导报,2005(12):106-109. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%