| 水热重结晶法制备四方相纳米Ba0.9Ca0.1TiO3晶体的研究 |
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| 引用本文： | 张维维,沈志刚,闫涛,陈建峰.水热重结晶法制备四方相纳米Ba0.9Ca0.1TiO3晶体的研究[J].化学学报,2006,64(6):574-578. |
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| 作者姓名： | 张维维 沈志刚 闫涛 陈建峰 |
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| 作者单位： | 北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室教育部超重力工程研究中心 北京100029 |
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| 基金项目： | 中国科学院资助项目;北京市科技新星计划项目;教育部霍英东教育基金 |
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| 摘 要： | 采用水热重结晶法对低温液相法制备的Ba0.9Ca0.1TiO3(B0.9C0.1T)浆料进行220 ℃, 3 h的水热处理, 成功制备了四方相B0.9C0.1T纳米粉体. 并对水热重结晶和未水热处理的两种粉体进行了TEM, XRD, Raman, FT-IR, TG和介电性能的表征. 研究表明, 经水热重结晶后的B0.9C0.1T粉体体系发生从顺电立方相向铁电四方相的转变, 羟基缺陷以及CO32－杂质显著减少, 粉体形貌由外边缘毛躁的球形转变为四边形. 并发现羟基缺陷的减少是影响体系相转变的关键因素.
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| 关 键 词： | Ba0.9Ca0.1TiO3 水热重结晶 羟基缺陷 |
| 收稿时间： | 08 9 2005 12:00AM |
| 修稿时间： | 2005-08-092005-11-11 |
Study on Hydrothermal Recrystallization Method for Synthesis of Tetragonally Structured Ba0.9Ca0.1TiO3 Nanocrystals |
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| ZHANG Wei-Wei,SHEN Zhi-Gang,YAN Tao,CHEN Jian-Feng.Study on Hydrothermal Recrystallization Method for Synthesis of Tetragonally Structured Ba0.9Ca0.1TiO3 Nanocrystals[J].Acta Chimica Sinica,2006,64(6):574-578. |
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| Authors: | ZHANG Wei-Wei SHEN Zhi-Gang YAN Tao CHEN Jian-Feng |
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| Institution: | Key Laboratory for Nanomaterials, Research Center of the Ministry of Education of China for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029 |
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| Abstract: | A novel hydrothermal recrystallization route has been developed to produce tetragonal Ba0.9Ca0.1TiO3 nanocrystals. The obtained powders were analyzed by TEM, XRD, Raman spectra, FTIR, TG and dielectric property measurements, and showed much less hydroxyl lattice defects, higher purity and bet- ter crystallinity than those prepared by low-temperature aqueous synthesis (LTAS) method. The hydroxyl lattice defect was key factor to influence the phase transition from paraelectric cubic to ferroelectric tetrago- nal structure. |
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| Keywords: | Ba0 9Ca0 1TiO3 hydrothermal recrystallization method hydroxyl lattice defect |
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