Synthesis and characterization of microwave-hydrothermally derived Ba1-xSrxTiO3 powders

被引：42

作者：

Deshpande, SB

Khollam, Y

Bhoraskar, YB

Date, SK

Sainkara, SR

Potdar, HS ^{[1
]}

机构：

[1] Natl Chem Lab, Phys & Mat Chem Div, Pune 411008, Maharashtra, India

[2] Univ Poona, Dept Phys, Pune 411007, Maharashtra, India

来源：

MATERIALS LETTERS | 2005年 / 59卷 / 2-3期

关键词：

barium-strontium titanate; microwave-hydrothermal synthesis; XRF; SEM; XRD; dissolution-recrystallization; mineralizer; microstructure;

D O I：

10.1016/j.matlet.2004.10.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Submicron-sized, spherical, stoichiometric strontium substituted barium titanate: Ba0.75Sr0.25TiO3 (BST) powders are prepared by microwave-hydrothermal (MH) route under the MH conditions of 200 degreesC, 200 psi, and 30 min in strongly alkaline conditions (pH>12) using potassium titanyl oxalate (KTO) and nitrates of Ba and Sr as the starting precursors and KOH as the mineralizer. The characterization studies by XRD, XRF and SEM indicated that stoichiometric cubic BST powders (a(0)=3.992 A) were obtained by adjusting MH conditions mentioned earlier and keeping the (Ba+Sr)/Ti ratio in starting solution slightly in excess (similar to1.06). (C) 2004 Elsevier B.V. All rights reserved.

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页码：293 / 296

页数：4

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