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Dielectric and Raman Spectroscopic Studies of Na0.5 Bi0.5 TiO3- BaSnO3 Ferroelectric System.
- Source :
- Journal of the American Ceramic Society; Jun2014, Vol. 97 Issue 6, p1846-1854, 9p
- Publication Year :
- 2014
-
Abstract
- A series of lead-free perovskite solid solutions of (1 − x) Na<subscript>0.5</subscript> Bi<subscript>0.5</subscript> TiO<subscript>3</subscript>( NBT)- x BaSnO<subscript>3</subscript>( BSN), for 0.0 ≤ x ≤ 0.15 have been synthesized using a high-temperature solid-state reaction route. The phase transition behaviors are studied using dielectric and Raman spectroscopic techniques. The ferroelectric to relaxor phase transition temperature ( T<subscript>FR</subscript>) and the temperature corresponding to maximum dielectric permittivity ( T<subscript>m</subscript>) are estimated from the temperature-dependent dielectric data. Dielectric studies show diffuse phase transition around ~335°C in pure NBT and this transition temperature decreases with increase in x. The disappearance of x-dependence of A<subscript>1</subscript> mode frequency at ~134 cm<superscript>−1</superscript> for x ≥ 0.1 is consistent with rhombohedral-orthorhombic transition. In situ temperature dependence Raman spectroscopic studies show disappearance and discontinuous changes in the phonon mode frequencies across rhombohedral ( x < 0.1)/orthorhombic ( x ≥ 0.1) to tetragonal transition. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 97
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 96310869
- Full Text :
- https://doi.org/10.1111/jace.12838