Structural and dielectric properties of BaTi1-xSnxO3 ceramics
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BaTi1-xSnO3 (BTS) powders, with x ranging from 0 to 1, were synthesized by solid-state reaction technique. The powders were pressed into pellets and sintered at 1370 and 1420 T. The structural characterization of sintered BTS samples was made at room temperature using X-ray diffraction and Raman spectroscopy measurements. The BTS samples were found to be single-phase solid solutions. Dielectric properties of sintered BTS samples were studied as a function of sintering temperatures and tin contents, too. For samples with x ranging from 0 up to 0.15, it has been found that the Curie temperature decreases while the maximum of the dielectric constant increases with increasing tin content. These samples have relatively high dielectric constants, contrary to x GT 0.2 samples with very low dielectric constants. It is noticed that BTS ceramics sintered at 1420 degrees C exhibit better dielectric properties than those sintered at 1370 degrees C.
Keywords:BaTi1-xSnxO3 / dielectric properties / phase transformation / solid state reaction / XRD
Source:Materials Science Forum, 2006, 518, 241-246
- Recent Developments in Advanced Materials and Processes, 7th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS), Sep 12-16, 2005, Herceg Novi, Montenegro