Oxygen content determination in perovskite-type cobaltates

被引：104

作者：

Conder, K ^{[1
]}

Pomjakushina, E

Soldatov, A

Mitberg, E

机构：

[1] ETH, Lab Neutron Scattering, CH-5232 Villigen, PSI, Switzerland

[2] PSI, CH-5232 Villigen, PSI, Switzerland

[3] BAS, Inst Solid State & Semicond Phys, Lab Supercond Mat Phys, Minsk 220072, BELARUS

[4] RAS, Inst Solid State Chem, Ural Branch, Lab Ion & Coatings, Ekaterinburg 620219, Russia

来源：

MATERIALS RESEARCH BULLETIN | 2005年 / 40卷 / 02期

关键词：

oxides; chemical synthesis; thermogravimetric analysis (TGA);

D O I：

10.1016/j.materresbull.2004.10.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three oxygen content determination methods (iodometric titration, gas volumetric analysis and thermogravimetric hydrogen reduction) have been evaluated for the case of rare earth cobaltates LnBCo(2)O(5+delta) (were Ln-rare earth, B-alkali earth elements). All the methods are based on oxidation properties of both Co4+ and Co3+ cations but different instrumentation was used for each of the method. We have obtained good agreement within +/-0.02 in delta for both the iodometric titration and the gas volumetric analysis, whereas the thermogravimetric hydrogen reduction was found to be less credible. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：257 / 263

页数：7

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