Zhou Weibin, Fan Jinbo, Xin Zhenchao, You Guodong
School of Electronic Information and Automation, Tianjin University of Science and Technology, Tianjin 300384, China.
Materials (Basel). 2020 Jan 17;13(2):448. doi: 10.3390/ma13020448.
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.
锆钛酸铅（PZT）基铁电复合材料因其众多实际、工业和科学应用，是材料科学中的一个重要研究课题。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，开发可靠且高效的微观模型用于分析电学性能，对于加速该领域的研究具有重要价值。本文开发了一种用于PZT基铁电复合材料的三维微观结构模型，并采用有限元方法（FEM）计算介电常数。所开发微观结构模型的微观参数是基于真实复合材料，通过X射线（微）衍射和体视学方法获取的。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基铁电复合材料的介电常数。在验证阶段，所提出的方法对真实微观结构的形态与所提技术生成的模型进行了可视化和数值比较。我们方法的模拟结果与其他文献中的实验结果基本一致。模拟实验结果还表明，当高介电相颗粒的体积比低于20%时，PZT基铁电复合材料的介电常数会发生显著变化。因此，该方法可以很容易地扩展到复合材料制备中。
