Advanced Ba0.5Sr0.5Zn0.2Fe0.8O3-δ perovskite-type ceramics as oxygen selective membranes:: Evaluation of the synthetic process

被引：40

作者：

Feldhoff, Armin ^{[1
]}

Martynczuk, Julia ^{[1
]}

Wang, Haihui ^{[1
]}

机构：

[1] Leibniz Univ Hannover, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany

来源：

PROGRESS IN SOLID STATE CHEMISTRY | 2007年 / 35卷 / 2-4期

关键词：

sol gel; barium carbonate; strontium carbonate; zinc-iron spinel; calcination; sintering; perovskite; electron microscopy; EDXS; EELS; HRTEM; Ellingham diagram;

D O I：

10.1016/j.progsolidstchem.2007.01.007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A synthetic route for advanced perovskites is elucidated that consists of a combined EDTA/citrate complexing of metal cations and the subsequent drying and firing at moderate temperatures. A fine-scale intermixing of cations is maintained during all the processing steps. The perovskite-type oxide is formed already in an intermediate step at 700 degrees C by the reaction of an ultra-finely dispersed powder consisting of a mixed barium-strontium carbonate, a zinc-iron spinel, and zinc oxide. The process yields powders of good sinterability and finally dense ceramics composed of stoichiometric perovskite grains of the type (Ba,Sr)(Zn,Fe)O3-delta. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：339 / 353

页数：15

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