| (Pb_(0.9-x)La_(0.1)Ca_x)TiO_3纳米微粉的拉曼谱分析 |
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| 引用本文： | 袁小武,朱建国,肖定全,朱居木,余萍. (Pb_(0.9-x)La_(0.1)Ca_x)TiO_3纳米微粉的拉曼谱分析[J]. 无机材料学报, 2003, 18(3): 585-589 |
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| 作者姓名： | 袁小武 朱建国 肖定全 朱居木 余萍 |
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| 作者单位： | 四川大学材料科学系，成都610064 |
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| 基金项目： | 国家重大基础研究计划(0601);国家教育部骨干教师计划 |
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| 摘 要： | 利用溶胶-凝胶法(sol-gel)合成制备了PbTiO3、(Pb0．9-xLa0．1Cax)TiO3[简写为PLCT(100x)]纳米微粉，微粉平均粒径为20-40nm．利用拉曼散射和X射线衍射技术研究了不同Ca含量对PLCT(100x)纳米微粉的结构的影响．实验结果表明，PLCT(100x)纳米微粉的结构随x变化，亦即PLCT(100x)的轴比随x的增大反而减小，研究结果表明：PLCT(100x)拉曼谱的低频模可以看成是由于钙钛矿结构中A位离子Ca2 、La3 的偏离引起的，而高频模主要是TiO6八面体内部原子的相互运动造成相对位置变化，从而使八面体发生形变引起的．
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| 关 键 词： | 溶胶－凝胶法 （Pb0．9－La0.1Cax）TiO3 纳米微粉 拉曼谱 |
| 文章编号： | 1000-324X(2003)03-0585-05 |
| 收稿时间： | 2002-03-18 |
| 修稿时间： | 2002-03-18 |
Raman Scattering Investigation of the Phase Transition in Nanocrystalline (Pb0.9-xLa0.1Cax)Ti0.975O3 Powders |
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| YUAN Xiao-Wu,ZHU Jian-Guo,XIAO Ding-Quan,ZHU Ju-Mu,YU Ping. Raman Scattering Investigation of the Phase Transition in Nanocrystalline (Pb0.9-xLa0.1Cax)Ti0.975O3 Powders[J]. Journal of Inorganic Materials, 2003, 18(3): 585-589 |
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| Authors: | YUAN Xiao-Wu ZHU Jian-Guo XIAO Ding-Quan ZHU Ju-Mu YU Ping |
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| Affiliation: | DepartmentofMaterialsScience;SichuanUniversity;Chengdu610064;China |
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| Abstract: | Nanocrystalline (Pb0.9-xLa0.1Cax)Ti0.975O3 (PLCT) powders were prepared by the sol-gel technique. The average grain size of the powders is from 20 to 40nm. The structure of the PLCT powders was investigated by using Raman scattering and X-ray diffraction analyses. The experimental results show that low frequency phonon mode of PLCT (100x) Raman spectrum is attributed to the deviation of Ca2+ and La3+ in A location of the perovskite structure; and high frequency phonon mode is attributed to the deformation of TiO6 octahedron, which is resulted by the deviation of the atoms in TiO6 octahedron from ideal position. |
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