Dielectric and ferroelectric properties of BST ceramics obtained by a hydrothermally assisted complex polymerization method

被引：25
作者：
Cirkovic, Jovana [1 ]
Vojisavljevic, Katarina [1 ,2 ]
Nikolic, Nenad [1 ]
Vulic, Predrag [3 ]
Brankovic, Zorica [1 ]
Sreckovic, Tatjana [1 ]
Brankovic, Goran [1 ]
机构：
[1] Univ Belgrade, Inst Multidisciplinary Res, Belgrade 11030, Serbia
[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia
[3] Univ Belgrade, Fac Min & Geol, Dept Crystallog, Belgrade 11030, Serbia
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 09期
关键词：
Sintering; Dielectric properties; Ferroelectric properties; BaTiO3 and titanates; ABNORMAL GRAIN-GROWTH; THIN-FILMS; BATIO3; PHASE; MICROSTRUCTURE; DOMAINS; STOICHIOMETRY; REFINEMENT; KINETICS;
D O I：
10.1016/j.ceramint.2015.05.088
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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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页码：11306 / 11313
页数：8
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