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PZT四方相区介电常数εr与晶格畸变关系的研究

张端明 严文生 钟志成 杨凤霞 郑克玉 李智华

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PZT四方相区介电常数εr与晶格畸变关系的研究

张端明, 严文生, 钟志成, 杨凤霞, 郑克玉, 李智华

Study on the relation between the dielectric properties and lattice distortions in PZT ferroelectric tetragonal phase region

Zhang Duan-Ming, Yan Wen-Sheng, Zhong Zhi-Cheng, Yang Feng-Xia, Zheng Ke-Yu, Li Zhi-Hua
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  • 从Haun的PZT热力学理论出发,给出了PZT四方相区介电常数εr与晶格畸变c/a关 系的基本方程,并深入地根据相关实验资料和物理图像的合理推论,建立了关于晶格畸变c/ a与介电常数εr相互依赖的基本关系式.然后,根据该基本关系式仔细地研究了PZT四 方相区晶格畸变c/a对介电常数εr影响的物理图像.与相关实验资料比较表明,基本 关系式得到的介电常数εr随晶格畸变c/a的变化规律,与相关实验结果相比较,两者 吻合得
    From thermodynamic theory of the lead zirconatetitanate(PZT) solid solution sy stem, we have got the basic equation between the dielectric constant εr a nd lattice distortion c/a in ferroelectric tetragonal phase region, and base d on the relative experimental data and logical deduction to physics image, we h ave established basic relations between εr and c/a. And then, from th e basic relations, we have studied in detail the physics image about lattice dis tortion c/a effect on the dielectric constant εr in ferroelectric tet ragonal phase region. A comparison with related experimental results indicates t hat the results of the basic relations are in good agreement with the conclusion s of the experiments. Finally, we have discussed the application range of the ba sic relations and the physics reason of relative warp out of application range. We would emphasize that the basic relations are essentially fitted to all perovs kite structure materials.
    • 基金项目: 国家自然科学基金(批准号:50272022 )、华中科技大学激光技术国家重点实验室基金 (批准号 :9713D)、湖北省自然科学基金(批准号:2001ABB099)、湖北省教育厅重大科技项目基金 (批准号:2000B5002)资助的课题.
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出版历程
  • 收稿日期:  2003-07-09
  • 修回日期:  2003-08-11
  • 刊出日期:  2005-04-29

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