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Title: Grain size induced monoclinic ( Cm) to rhombohedral ( R3c) transformation in sodium potassium bismuth titanate ceramics

Here, grain size effect on structure, remnant polarization and piezoelectric constant of lead-free Na 0.4 K 0.1 Bi 0.5 TiO 3 ceramics with grain sizes of 0.58, 0.85, 1.19 and 1.83 pm was investigated. Synchrotron X-ray diffraction in combination with Rietveld refinement was used to examine the structural changes. We have reported an existence of monoclinic ( Cm) phase at room temperature and discussed the grain size (1.83 → 0.58 μm) induced structural transformation ( CmR3c) through both intrinsic polarization rotation and adaptive phase theory. Polarization vector in the (11¯0) pc monoclinic plane rotates towards [111] pc with the reduction of grain size. Better domain alignment and large polar variants results enhanced remnant polarization and piezoelectric constant in 1.83 μm sample.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. Manonmaniam Sundaranar Univ., Tirunelveli (India)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 141; Journal Issue: C; Journal ID: ISSN 1359-6462
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
University Grants Commission (UGC) of India; USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; piezoelectric ceramics; piezoelectricity; sintering; synchrotron radiation
OSTI Identifier:
1459948

Gajendra Babu, M. Veera, Bagyalakshmi, B., Padiyan, D. Pathinettam, Ren, Y., and Sundarakannan, B.. Grain size induced monoclinic (Cm) to rhombohedral (R3c) transformation in sodium potassium bismuth titanate ceramics. United States: N. p., Web. doi:10.1016/j.scriptamat.2017.07.022.
Gajendra Babu, M. Veera, Bagyalakshmi, B., Padiyan, D. Pathinettam, Ren, Y., & Sundarakannan, B.. Grain size induced monoclinic (Cm) to rhombohedral (R3c) transformation in sodium potassium bismuth titanate ceramics. United States. doi:10.1016/j.scriptamat.2017.07.022.
Gajendra Babu, M. Veera, Bagyalakshmi, B., Padiyan, D. Pathinettam, Ren, Y., and Sundarakannan, B.. 2017. "Grain size induced monoclinic (Cm) to rhombohedral (R3c) transformation in sodium potassium bismuth titanate ceramics". United States. doi:10.1016/j.scriptamat.2017.07.022. https://www.osti.gov/servlets/purl/1459948.
@article{osti_1459948,
title = {Grain size induced monoclinic (Cm) to rhombohedral (R3c) transformation in sodium potassium bismuth titanate ceramics},
author = {Gajendra Babu, M. Veera and Bagyalakshmi, B. and Padiyan, D. Pathinettam and Ren, Y. and Sundarakannan, B.},
abstractNote = {Here, grain size effect on structure, remnant polarization and piezoelectric constant of lead-free Na0.4K0.1Bi0.5TiO3 ceramics with grain sizes of 0.58, 0.85, 1.19 and 1.83 pm was investigated. Synchrotron X-ray diffraction in combination with Rietveld refinement was used to examine the structural changes. We have reported an existence of monoclinic (Cm) phase at room temperature and discussed the grain size (1.83 → 0.58 μm) induced structural transformation (Cm → R3c) through both intrinsic polarization rotation and adaptive phase theory. Polarization vector in the (11¯0)pc monoclinic plane rotates towards [111]pc with the reduction of grain size. Better domain alignment and large polar variants results enhanced remnant polarization and piezoelectric constant in 1.83 μm sample.},
doi = {10.1016/j.scriptamat.2017.07.022},
journal = {Scripta Materialia},
number = C,
volume = 141,
place = {United States},
year = {2017},
month = {8}
}