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Micro-Structure Modelling and Electrical Properties Analysis of PZT Matrix Ferroelectric Composites

机译：PZT基铁电复合材料的微观结构建模和电性能分析

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摘要

PZT matrix ferroelectric composite is an important research topic in material science because of its many practical, industrial, and scientific applications. Materials with high dielectric permittivity are used to manufacture electronic devices, particularly capacitors and dynamic random access memory (DRAM). Therefore, the development of reliable and efficient micro models to be utilized in analyzing electrical properties can be of great value in accelerating research in this field. In this paper, a 3D microstructure model for PZT matrix ferroelectric composites has been developed and adopted the finite element method (FEM) to calculate the dielectric constant. The microscopy parameters of developed microstructure model are acquired based on the real composites from X-ray (micro-) diffraction and stereological method. The dielectric constant of different volume ratios of PZT matrix ferroelectric composites can be calculated by accurately controlling the volume of Ferrite particles. At the point of validation, the proposed approach makes visual and numeric comparisons between the morphology of the real microstructure and the model generated by the proposed technique. The simulation results by our method was essentially in agreement with experimental results in other literature. Simulation Experimental results also demonstrate that the dielectric constant of PZT matrix ferroelectric composites is significantly changed while the volume ratio of high dielectric phase particles was below 20%. PZT matrix ferroelectric composites Consequently, this method can be easily extended to composites preparation.
机译：PZT基质铁电复合材料由于其许多实际，工业和科学应用而成为材料科学中的重要研究课题。具有高介电常数的材料用于制造电子设备，特别是电容器和动态随机存取存储器（DRAM）。因此，开发可用于分析电性能的可靠而有效的微模型对于加速该领域的研究具有重要的价值。本文建立了PZT基体铁电复合材料的3D微观结构模型，并采用有限元方法（FEM）计算介电常数。基于X射线（微观）衍射和体视学方法的真实复合材料，获得了开发的微观结构模型的显微镜参数。通过精确控制铁氧体颗粒的体积，可以计算出不同体积比的PZT基体铁电复合材料的介电常数。在验证时，所提出的方法在真实微观结构的形态与所提出的技术生成的模型之间进行了视觉和数值比较。我们方法的仿真结果与其他文献的实验结果基本一致。仿真实验结果还表明，当高介电相颗粒的体积比低于20％时，PZT基体铁电复合材料的介电常数会发生显着变化。因此，该方法可以轻松地扩展到复合材料的制备。

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