Synthesis, phase stability and electrical conductivity of Sr2MgMoO6-δ anode

被引：62

作者：

Marrero-Lopez, D. ^{[1
]}

Pena-Martinez, J. ^{[1
]}

Ruiz-Morales, J. C. ^{[1
]}

Perez-Coll, D. ^{[1
]}

Aranda, M. A. G. ^{[2
]}

Nunez, P. ^{[1
]}

机构：

[1] Univ La Laguna, Dept Quim Inorgan, Tenerife 38200, Spain

[2] Univ Malaga, Dept Quim Inorgan, E-29071 Malaga, Spain

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 8-9期

关键词：

oxides; impedance spectroscopy; electrical properties; microstructure;

D O I：

10.1016/j.materresbull.2007.07.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A freeze-drying precursor method has been used to prepare polycrystalline materials of the new SOFC anode, Sr2MgMoO6-delta. The optimal synthesis conditions were studied in order to avoid secondary phase segregations. These materials were characterised by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermal analysis (TG/DTA) and scanning electron microscopy (SEM). The as-synthesised polycrystalline powders showed homogeneous particle size distribution in the submicrometric range. The stability studies demonstrated that this phase is stable up to 1200 degrees C under 5% H-2-Ar. In addition, impedance spectroscopy was used to determine the conductivity of ceramic pellets prepared under oxidising and reducing atmosphere. Samples sintered in reducing atmosphere exhibit higher conductivity values than those prepared in air. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2441 / 2450

页数：10