NDLI: Influence of calcination temperature on the structure and optical properties of Bi$_{3.25}$La$_{0.75}$Ti$_{3}$O$

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Journal of the Korean Physical Society : Volume 65, Issue 1, July 2014

Journal of the Korean Physical Society : Volume 64

Journal of the Korean Physical Society : Volume 63

Journal of the Korean Physical Society : Volume 62

Journal of the Korean Physical Society : Volume 61

Journal of the Korean Physical Society : Volume 60

Influence of calcination temperature on the structure and optical properties of Bi$_{3.25}$La$_{0.75}$Ti$_{3}$O$_{12}$ powders

Content Provider	Springer Nature Link
Author	Bark, Chung Wung Han, Jun Young
Copyright Year	2014
Abstract	Lanthanum-modified bismuth-titanate powders (BLT) were synthesized using a solid reaction method at various calcination temperatures for 2.5 h under an ambient environment. The evolutions of the structural and the optical properties were analyzed by using X-ray diffraction and ultravioletvisible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements. The analysis showed that the samples calcined at 700 °C crystallized in an orthorhombic structure with an optimal chemical ratio. The samples calcined at temperature below 500 °C resulted in the α-Bi$_{2}$O$_{3}$ phase. The structure and the optical bandgap of the sample calcined at 600 °C showed a decrease in the optical bandgap due to the incomplete formation of an orthorhombic BLT structure. The samples calcined at high temperatures exhibited expansion of the unit-cell volume as compared to the optimal samples. In those samples, Bi vacancies due to the high temperature annealing were responsible for changes in the UV PL profile. The relative intensity of the higher energy part (green) in the PL spectra increased with increasing calcination temperature, even though the origin of the shift in the PL spectra might be different at each temperature.
Starting Page	216
Ending Page	221
Page Count	6
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	65
Issue Number	2
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2014-08-06
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	α-Bi$_{2}$O$_{3}$ Ceramics and refractories Bismuth titanate Electro-optical effects Theoretical, Mathematical and Computational Physics Ferroelectricity and antiferroelectricity Calcination temperature Physics Particle and Nuclear Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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