Crystal structure, dielectric and optical properties of wide band gap Sr2+ modified NBT (Na0.5Bi0.5TiO3).

Authors :: Mallick, Jyotirekha
Shukla, Anant
Kar, Manoranjan
Source :: AIP Conference Proceedings; 2024, Vol. 2995 Issue 1, p1-4, 4p
Publication Year :: 2024
Abstract: Lead free NBT (sodium bismuth titanate) is an emerging ferroelectric material due to its ability to replace the lead based ceramics. In this work, the solid state reaction method is employed to prepare Sr modified Na<subscript>0.5</subscript>Bi<subscript>0.5</subscript>TiO<subscript>3</subscript> (Na<subscript>0.5</subscript>Bi<subscript>0.47</subscript>Sr<subscript>0.03</subscript>TiO<subscript>3</subscript>). The structural, dielectric, ferroelectric, and optical properties have been investigated. The crystal symmetry has been identified from XRD and Raman spectra. The surface morphology of the prepared sample has been investigated from the FESEM micrograph. The average crystallite size is found to be 1.6 μm calculated by image J software. The frequency dependent dielectric properties of the sample has been studied in the range 10 Hz to 10 kHz. A wide optical bandgap (∼3.5 eV) of Na<subscript>0.5</subscript>Bi<subscript>0.47</subscript>Sr<subscript>0.03</subscript>TiO<subscript>3</subscript> has been observed from the Tauc plot of UV spectra. [ABSTRACT FROM AUTHOR]

Subjects :: DIELECTRIC properties
BAND gaps
OPTICAL properties
CRYSTAL structure
LEAD titanate
FERROELECTRIC materials
TITANATES

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