Structural and Dielectric Properties of BaTi1-xSnxO3 Ceramics
BaTi1-xSnxO3 (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 oC. 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 singlephase 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 > 0.2 samples with very low dielectric constants. It is noticed that BTS ceramics sintered at 1420 oC exhibit better dielectric properties than those sintered at 1370 oC.
Dragan P. Uskokovic, Slobodan K. Milonjic and Dejan I. Rakovic
S. Marković et al., "Structural and Dielectric Properties of BaTi1-xSnxO3 Ceramics", Materials Science Forum, Vol. 518, pp. 241-246, 2006