Effect of La3+-donor substitution on structural, micro structural, dielectric and ferroelectric characteristics of BLNT-BZT solid solutions

Raju, Karri and Kandula, Kumara Raja and Asthana, Saket and Patri, Tirupathi (2018) Effect of La3+-donor substitution on structural, micro structural, dielectric and ferroelectric characteristics of BLNT-BZT solid solutions. Phase Transitions. pp. 1-12. ISSN 0141-1594 (In Press)

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Abstract

Lanthanum (La)-modified 0.93(Bi0.5−xLaxNa0.5TiO3)–0.07(BaTi0.96Zr0.04O3) (0.00 ≤ x ≤ 0.08) (Abbreviated as BLNT-BZT) ceramics were synthesized (close to MPB) by using conventional solid state route. The structural phase purity of ceramics was confirmed by using room temperature (RT) X-ray diffraction. The structural phases coexistence was analyzed with different duel phase model and bring out the amount of phase contribution quantitatively with the help of Rietveld refinement technique. The X-rays diffraction studies revealed that coexisting of minor tetragonal (P4mm) phase evolution along with major monoclinic structural (Cc) phase. Moreover, the above affirmation was clarified from Raman studies, observed that TiO6 reflection at 500–600 cm−1 splitting occurs resides the presence of MPB of ceramics. With the substitution of La in BNT–BZT induces the gradual change in the average grain size and non-uniform distribution was observed from the surface morphology. The dielectric anomalies of these BLNT-BZT ceramics show broad dielectric anomaly near the maximum dielectric constant, which reflects the diffuse phase transition behavior. The RT P-E loops were observed in slim and slanted shape, replicates the enhanced properties due to the phase additive behavior near the MPB.

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IITH Creators:
IITH CreatorsORCiD
Asthana, Sakethttp://orcid.org/0000-0002-6420-3304
Item Type: Article
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 04 Dec 2018 04:44
Last Modified: 04 Dec 2018 04:44
URI: http://raiith.iith.ac.in/id/eprint/4601
Publisher URL: http://doi.org/10.1080/01411594.2018.1535065
OA policy: http://www.sherpa.ac.uk/romeo/issn/0141-1594/
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