无机材料学报

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Sol-Gel法制备BaxSr1-xTiO3铁电薄膜化学机制的探讨

金承钰1; 丁永平2; 孟中岩1   

  1. 1. 上海大学无机材料系, 上海 201800; 2. 上海交通大学, 上海 200030
  • 收稿日期:1999-05-14 修回日期:1999-06-28 出版日期:2000-04-20 网络出版日期:2000-04-20

Studies on the Chemical Mechanism of BaxSrl-xTiO3 Ferroelectric Thin Films by Sol-Gel Method

JIN Cheng-Yu1; DING Yong-Ping2; MENG Zhong-Yan 1   

  1. l. Department of Material Science; Shanghai University; Shanghai 201800; Chinal 2. Department of Material Science; Shanghai Jiaotong University; Shanghai 200030; China
  • Received:1999-05-14 Revised:1999-06-28 Published:2000-04-20 Online:2000-04-20

摘要: 用FTIR分析,结合DSC、XRD、AFM实验结果,展示了sol-gel法制备BaSr1-TiO(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.

关键词: BST薄膜, sol-gel工艺, FTIR, DSC, XRD, AFM

Abstract: 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.

Key words: BST thin films, sol-gel method, FTIR, DSC, XRD, AFM

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