Synthesis of nanosized β-BiTaO4 by the polymeric precursor method

被引：30

作者：

Almeida, Cristiane Gomes ^{[1
]}

Carvalho Andrade, Heloysa Martins ^{[1
,2
]}

Santos Mascarenhas, Artur Jose ^{[1
,2
]}

Silva, Luciana Almeida ^{[1
,2
]}

机构：

[1] Univ Fed Bahia, Inst Quim, BR-40170290 Salvador, BA, Brazil

[2] Univ Fed Bahia, INCT, BR-40170290 Salvador, BA, Brazil

来源：

MATERIALS LETTERS | 2010年 / 64卷 / 09期

关键词：

beta-BiTaO4; Polymeric precursor method; Nanosized particles; Nanomaterials; Semiconductors; LOW-TEMPERATURE SYNTHESIS; COPRECIPITATION TECHNIQUE; OPTICAL-PROPERTIES; PREPARE BINBO4;

D O I：

10.1016/j.matlet.2010.02.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

beta-BiTaO4 powder was synthesized by the citrate method, using bismuth citrate and TaCl5 as precursors. The citrate gel was characterized by thermal analyses (TG and DTA), in order to determine the best polymerization temperature. The polymeric precursor is essentially amorphous and after calcination at 400 degrees C a mixture of tantalates, that are isomorphic to Bi3NbO7 and Bi5Nb3O15, starts to crystallize. At 600 degrees C, in addition to those phases, one could observe some peaks related to beta-BiTaO4. Finally, at 800 degrees C beta-BiTaO4 can be observed as a pure phase, with particle size estimated as 47 nm. The precursor polymeric method allowed obtaining beta-BiTaO4 pure phase at temperatures significantly lower than those found for solid state reaction method. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1088 / 1090

页数：3

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