用ＦＴＩＲ分析，结合ＤＳＣ、ＸＲＤ、ＡＦＭ实验结果，展示了ｓｏｌ－ｇｅｌ法制备ＢａｘＳｒ１－ｘＴｉＯ３（ＢＳＴ）薄膜热演化过程的化学机制．研究表明：螯合剂ＨＡＣＡＣ的引入减缓钛醇盐水解速率、改善晶化途径、降低结晶起始温度，从而制得了晶化完善、致密无裂纹的ＢＳＴ薄膜．
FTIR analysis combined with DSC, XRD and AFM experiments was used to study on the chemical mechanism of thermal evolution for BaxSr1-xTiO3 (BST) thin films derived by sol-gel method. Acetylacetone(HAcAc) was introduced as a chelating agent to reduce a rapid hydrolysis rate of Ti-alkoxide, to improve its crystallization path, to decrease its crystallization temperature. And then the densified and crack-free BST thin films with better crystallization were fabricated.
参考文献
| [1] | Ohfuji S, Itsumi M, Akiya H. Jpn. J. Appl. Phys., 1997, 36: 5854--5859. [2] Sugii N, Takagi K. Thin Solid Films, 1998, 323: 63--67. [3] Sengupta L C, Ngo E, Stowell S, et al. Ferroelectrics, 153, 359 1994, 153: 359--364. [4] Shaikh A S, Vest G M. J. Am. Cera. Soc., 1986, 69 (9): 682--688. [5] Gust M C, Evans N D, Momoda L A, et al. J. Am. Cera. Soc., 1997, 80 (11): 2828--2836. [6] Ding Y P, Cheng J R, Li C M, et al. Microstructure and electrical properties of BaxSr1-xTiO3 thin films prepared by sol-gel process. In: edited by Vincenzini P ed. Advances in Science and Technology, Volume 20, Faenza：Techna Press, 1999. 615. [7] Ding Y P, Jin C Y, Meng Z Y. Submitted to Mater. Res. Bull. [8] 陈允魁．红外吸收光谱法及其应用．上海：上海交通大学出版社，1993. 2?： 13， 7： 135. [9] Kamalasanan M N, Kumar N D, Chandra S. J. Mater. Sci., 1996, 31: 2741--2745. [10] Jang S I, Choi B C, Jang H M. J. Mater. Res., 1997, 12 (5): 1327--1334. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%