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Research Article
Pattayil Joy
National Chemical Laboratory CSIR
Corresponding Author
ORCiD: https://orcid.org/0000-0003-2125-0976
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This work is licensed under a CC BY 4.0 License. Read Full License
Bismuth sodium titanate Bi0.5Na0.5TiO3 (BNT) is a lead-free piezoelectric ceramic material with high Curie temperature. The effect of substitution of the smaller ion Li+ for the larger ion Na+ in Bi0.5(Na1−xLix)0.5TiO3 (0 ≤ x ≤ 0.20) on the structure of BNT is studied using powder X-ray diffraction (XRD) and Raman spectroscopy. Rietveld refinement analysis of the powder XRD patterns showed that all the compositions formed under monoclinic Cc space group, with the lattice parameters showing minor changes above x > 0.08. Raman spectral parameters such as position and intensity of a peak also showed a similar trend in the same Li concentration range with increasing Li content. A corresponding change in the variation of the dielectric constant with increasing Li content is observed suggesting a close correlation between the local structure and properties of the different compositions in the Bi0.5(Na1−xLix)0.5TiO3 solid solution series.
Keywords
Bismuth sodium titanate, Bi0.5Na0.5TiO3, Li substitution, Lead free ferroelectrics, Structure property correlation, Raman spectroscopy, Dielectrics
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This is a preprint. It has not completed peer review.
Research Article
Pattayil Joy
National Chemical Laboratory CSIR
Corresponding Author
ORCiD: https://orcid.org/0000-0003-2125-0976
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 28 May, 2020
No community comments so far
Subject Areas
Ceramics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Bismuth sodium titanate Bi0.5Na0.5TiO3 (BNT) is a lead-free piezoelectric ceramic material with high Curie temperature. The effect of substitution of the smaller ion Li+ for the larger ion Na+ in Bi0.5(Na1−xLix)0.5TiO3 (0 ≤ x ≤ 0.20) on the structure of BNT is studied using powder X-ray diffraction (XRD) and Raman spectroscopy. Rietveld refinement analysis of the powder XRD patterns showed that all the compositions formed under monoclinic Cc space group, with the lattice parameters showing minor changes above x > 0.08. Raman spectral parameters such as position and intensity of a peak also showed a similar trend in the same Li concentration range with increasing Li content. A corresponding change in the variation of the dielectric constant with increasing Li content is observed suggesting a close correlation between the local structure and properties of the different compositions in the Bi0.5(Na1−xLix)0.5TiO3 solid solution series.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
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