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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 ,两者吻合得很好 .最后并对该基本关系式的适用范围 ,和范围以外存在的相对偏差产生的物理原因进行了讨论 .必须强调指出 ,本文建立的基本关系式实质上适用于所有四方相区钙钛矿结构材料晶格畸变对介电常数影响 .
Based on Haun’s theory of PZT thermodynamics, the basic equations of dielectric constant εr and lattice distortion Ca in tetragonal phase of PZT are given. According to the reasonable corollary of relevant experimental data and physical images, And the dielectric constant εr interdependence of the basic relationship between.Then, based on the basic relationship between the careful study of the PZT tetragonal phase lattice distortion ca dielectric constant εr impact on the physical image.Compared with the relevant experimental data show that the basic relationship Compared with the experimental results, the permittivity εr obtained by the formula is in good agreement with the experimental results.Finally, the applicable range of the basic relation and the relative deviation outside the range The physical reasons are discussed.It must be emphasized that the basic relation established in this paper is suitable for the influence of the lattice distortion on the dielectric constant of all the tetragonal phase perovskite structure materials.