Journal
CERAMICS INTERNATIONAL
Volume 41, Issue 9, Pages 11306-11313Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.05.088
Keywords
Sintering; Dielectric properties; Ferroelectric properties; BaTiO3 and titanates
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Funding
- Serbian Ministry of Educations, Science and Technological Development [III45007]
- Slovenian Research Agency [P2-0105]
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Ba0.8Sr0.2TiO3 (BST) powder, obtained by a hydrothermal treatment of precursor solution previously prepared by a complex polymerization method (HT-CPM), was uniaxially pressed and sintered at 1280 degrees C for 1-32 h. The sintering effect on structural parameters, phase composition, dielectric and ferroelectric properties was investigated. Rietveld refinement analysis of BST ceramics showed that predominant phase was tetragonal BST with monoclinic Ba6Ti17O40 (B6T17) as a secondary phase. Phase contents determined by Rietveld refinement match well with the results of energy dispersive X-ray analysis. Dielectric and ferroelectric properties of BST ceramics have been correlated with density of sintered compacts, phase composition, structural parameters and microstructure. The sample sintered for 16 h showed the highest density (93% rho(t)), as well as the highest value of dielectric constant (similar to 2300) and remanent polarization - Pr (2 mu C/cm(2)) among investigated samples. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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