Brzozowski, E.Castro, M. S.Foschini, C. R.Stojanovic, B.2014-05-202014-05-202002-01-01Ceramics International. Oxford: Elsevier B.V., v. 28, n. 7, p. 773-777, 2002.0272-8842http://hdl.handle.net/11449/35197In this work, the effect of Nb2O5 addition on the microstructure of BaTiO3 was studied. From XRD diagrams, a diminution in tetragonality parameters with an increase in dopant concentration was observed. In order to determine morphology and composition of secondary phases in niobium-doped barium titanate, EDAX and SEM analyses were carried out. It was found that a concentration of dopant higher than 0.15 mol% leads to fine-grained BaTiO3 without abnormal grain growth. Otherwise, compositions of secondary phases correspond to the titanium-rich region in the BaO-TiO2 phase diagram. Besides, the titanium content in the precipitate increases with the Nb2O5 addition. (C) 2002 Elsevier B.V. Ltd and Techna S.r.l. All rights reserved.773-777enggrain growthmicrostructureBaTiO3 and titanatesArtigo10.1016/S0272-8842(02)00042-1WOS:000178521800012Acesso restrito19223571848427670000-0003-1300-4978