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Structural phase transition and electrical properties of Sr 2+ substituted porous PMN ‐ PZT ceramics
Author(s) -
Liu Wei,
Lv Lin,
Wang Yanzhong,
Xue Chaorui,
Dong Yingge,
Wang Jianhong,
Yang Jinlong
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15447
Subject(s) - materials science , ceramic , porosity , tetragonal crystal system , phase (matter) , figure of merit , fabrication , electromechanical coupling coefficient , perovskite (structure) , composite material , phase transition , analytical chemistry (journal) , mineralogy , crystallography , chemistry , chromatography , condensed matter physics , optoelectronics , medicine , alternative medicine , physics , organic chemistry , pathology
In this study, Sr 2+ 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 ( k t ) 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 m 2 /N, and acoustic impedance Z value ranged from 4.59 to 7.55 MR ayls, which helped for applications in underwater transducers or hydrophones.