Roy, Sumit K. and Chaudhuri , S. and Kotnala , R. K. and Singh, D. K. and Singh , B. P. and Singh , S. N. and Chandra, K. P. and Prasad, K.
(2016)
Dielectric and Raman studies of Ba-0.06(Na1/2Bi1/2)(0.94)TiO3-NaNbO3 ceramics.
Materials Science-Poland , 34 (2).
437-445 .
ISSN 2083-1331
Abstract
In this work the X-ray diffraction, scanning electron microscopy, Raman and dielectric studies of lead free perovskite (1-x)Ba-0.06(Na1/2Bi1/2)(0.94)TiO3-xNaNbO(3) (0 <= x <= 1.0) ceramics, prepared using a standard solid state reaction method, were investigated. X-ray diffraction studies of all the ceramics suggested the formation of single phase with crystal structure transforming from rhombohedral-tetragonal to orthorhombic symmetry with the increase in NaNbO3 content. Raman spectra also confirmed the formation of solid solution without any new phase. Dielectric studies showed that the phase transition is of diffusive character and diffusivity parameter decreases with increasing NaNbO3 content. The compositional fluctuation was considered to be the main cause of diffusivity.
| Item Type: |
Article
|
| Uncontrolled Keywords: |
lead-free;
structure;
dielectric constant;
Raman spectroscopy |
| Subjects: |
Materials Science |
| Divisions: |
UNSPECIFIED |
| Depositing User: |
Dr. Rajpal Walke
|
| Date Deposited: |
17 Nov 2017 08:19 |
| Last Modified: |
17 Nov 2017 08:19 |
| URI: |
http://npl.csircentral.net/id/eprint/2184 |
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