Structural, dielectric and ferroelectric properties of lead-free Na0.5Bi0.5TiO3 ceramics prepared by spark plasma sintering technique
Author | Mudinepalli, V. R. |
Author | Leng, F. |
Author | Reddy, M. P. |
Author | Lin, W. C. |
Author | Murty, B. S. |
Available date | 2021-05-20T04:35:57Z |
Publication Date | 2016 |
Publication Name | Indian Journal of Physics |
Resource | Scopus |
ISSN | 9731458 |
Abstract | Lead-free Na0.5Bi0.5TiO3 (NBT) fine-grained ceramics were prepared by spark plasma sintering method. Single phase ceramics with an ABO3 perovskite structure were confirmed by X-ray diffraction method. The grain morphology was analyzed by using a scanning electron micrograph. The crystal particles arranged compactly and the typical grain size was about ≈200 nm. The depolarization temperature T d, the rhombohedral–tetragonal phase transition temperature T R−T and the temperature T m of the maximum dielectric constant corresponding to tetragonal–cubic phase transition were determined to be 453 K, approximately 623 and 793 K, respectively, from the temperature dependence of dielectric properties. The P-E hysteresis loop at different temperatures indicated the existence of antiferroelectric state at the depolarization temperature T d, which explained the antiferroelectric phase above T d. The values of P s, P r and E c reduced slightly with increasing temperature in the range 303–453 K. |
Language | en |
Publisher | Scientific Publishers |
Subject | Ceramics Dielectric properties Electrical properties Ferroelectricity X-ray diffraction |
Type | Article |
Pagination | 131-138 |
Issue Number | 2 |
Volume Number | 90 |
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