Structural phase transition and electrical properties of Sr2+ substituted porous PMN‐PZT ceramics. Issue 6 (30th January 2018)

• Record Type: Journal Article
• Authors: Liu, Wei; Lv, Lin; Wang, Yanzhong; Xue, Chaorui; Dong, Yingge; Wang, Jianhong; Yang, Jinlong
• Is Part Of: Journal of the American Ceramic Society. Volume 101:Issue 6(2018)
• Page Start: 2197
• Page End: 2201
• Publication Date: 2018-01-30
• Subjects: electric properties -- ionotropic gelation -- phase transformations -- porous materials; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.15447
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: 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 MRayls, which helped for applications in underwater transducers or hydrophones.