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Preparation and characterization of barium titanate stannate solid solutions |
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| Authors: | Nadejda Horchidan Adelina C IanculescuLavinia P Curecheriu Florin TudoracheValentina Musteata Stefania StoleriuNicolae Dragan Dorel CrisanSorin Tascu Liliana Mitoseriu |
| Affiliation: | a Department of Physics, “Al. I. Cuza” University, Bv. Carol 11, Iasi 700506, Romania b Department of Oxide Materials Science and Engineering, Polytechnics University, 1-7 Gh. Polizu, P.O. Box 12-134, 011061 Bucharest, Romania c Institute of Macromolecular Chemistry “Petru Poni”, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania d Institute of Physical Chemistry “Ilie Murgulescu”, Lab. of Oxide Materials Science, 202 Splaiul Independen?ei, 060021 Bucharest, Romania |
| Abstract: | BaSnxTi1−xO3 (x = 0; 0.05; 0.1; 0.15; 0.2) solid solutions were prepared via conventional solid state reaction and sintered at 1300 °C for 4 h, resulting in dense single phase ceramics with homogeneous microstructures. Tetragonal symmetry for x ≤ 0.1, cubic for x = 0.2 and a superposition of tetragonal and cubic for x = 0.15 compositions were found by X-ray diffraction analysis. The temperature and frequency dependence of the complex dielectric constant and dc tunability were determined. A transformation from normal ferroelectric to relaxor with diffuse phase transition was observed with increasing the Sn concentration. All the investigated compositions show a relative tunability between 0.55 (for x = 0.2) and 0.74 (for x = 0.1), at a field amplitude of E = 20 kV/cm. |
| Keywords: | Barium stannate titanate Ferroelectrics Relaxor Tunability Hysteresis |
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