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Structural phase transition and electrical properties of Sr2+ substituted porous PMN‐PZT ceramics

Abstract

In this study, Sr2+ modified porous PMN‐PZT ceramics with one‐dimensional pore channels were produced by the ionotropic gelation process of alginate/PMN‐PZT suspensions. The ion‐exchange method was employed during the fabrication procedure to adjust the content of SrO addition. With the SrO addition increasing from 1.653 wt.% to 2.957 wt.%, the structural phase of porous PMN‐PZT ceramics transformed from rhombohedral (R) to tetragonal (T) perovskite phase. Accordingly, the electromechanical coupling coefficient (kt) value of porous PMN‐PZT ceramics decreased from 64.7% to 58.7%, while the hydrostatic figure of merit (HFOM) value increased from 1510 to 5547×10‐15 m2/N, and acoustic impedance Z value ranged from 4.59 to 7.55 MRayls, which helped for applications in underwater transducers or hydrophones.

This article is protected by copyright. All rights reserved.

Authors:   Wei Liu, Lin Lv, Yanzhong Wang, Chaorui Xue, Yingge Dong, Jianhong Wang, Jinlong Yang
Journal:   Journal of the American Ceramic Society
Year:   2018
Pages:   n/a
DOI:   10.1111/jace.15447
Publication date:   20-Jan-2018
Facts, background information, dossiers
  • suspensions
  • perovskite
  • impedance
  • copyright
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