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Performance Improvement of Ring-Type PZT Ceramics for Ultrasonic Dispersion System

机译:超声分散体系中环形PZT陶瓷的性能改进

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摘要

This study has been based on the examination of the characterization of ring-type lead zirconate titanate (PZT) ceramics for high-intensity focused ultrasonic dispersion system. The ring-type PZT ceramics were fabricated by the powder molding method. The mechanical properties, dielectric constant, and microstructure of the ceramics were investigated. Consequently, the density of the ceramics was increased with increasing forming pressure while the density of ceramics that were sintered at 1350 °C was decreased due to over-sintering. Furthermore, the mechanical properties were excellent at the higher forming pressure. The dielectric property of the ring-type PZT ceramics was not clearly influenced by the manufacturing and sintering conditions. The abnormal grain growth of the ceramics, however, could be prevented by a lower heating rate in addition to reducing the porosity.
机译:这项研究是基于对高强度聚焦超声分散系统中环形锆钛酸铅(PZT)陶瓷的表征的研究。环形PZT陶瓷通过粉末成型法制造。研究了陶瓷的力学性能,介电常数和微观结构。因此,随着成形压力的增加,陶瓷的密度增加,而由于过度烧结,在1350℃下烧结的陶瓷的密度降低。此外,在较高的成型压力下机械性能优异。环形PZT陶瓷的介电性能不受制造和烧结条件的明显影响。然而,除了降低孔隙率之外,还可以通过降低加热速率来防止陶瓷的异常晶粒长大。

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