Synthesis of Sr and Mg double-doped LaAlO3 nanopowders via EDTA-glycine combined process

被引：21

作者：

Qin, Guoheng ^{[1
]}

Huang, Xiaowei ^{[1
]}

Chen, Jing ^{[1
]}

He, Zhiping ^{[1
]}

机构：

[1] Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China

来源：

POWDER TECHNOLOGY | 2013年 / 235卷

关键词：

Double-doped LaAlO3; Chemical synthesis; Particle size distribution; Solid electrolyte; SOFC; NITRATE COMBUSTION SYNTHESIS; LANTHANUM ALUMINATE; ELECTRICAL-CONDUCTIVITY; IONIC-CONDUCTION; OXYGEN VACANCY; SOLID-SOLUTION; LAGAO3; COEFFICIENT; BEHAVIOR; OXIDES;

D O I：

10.1016/j.powtec.2012.11.048

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The objective of this work is to develop a new process to synthesize LaAlO3 nanopowders double-doped by Sr and Mg with homogenous composition. This process combines the complexing ability of EDTA with the advantages of GNP combustion technique to overcome the shortcomings of GNP, using EDTA and glycine as main complexing agent and main fuel, respectively. The precursor and calcined powders are characterized by TG-DSC, XRD, TEM/EDS and Acoustic Particle Size Analyzer (APS). Single phase perovskite-type LaAlO3 solid solution is synthesized at 750 degrees C for 3 h, which is directly converted from amorphous precursor powders without any intermediate phase formation. After calcined at 1000 degrees C for 3 h, the median particle size of La0.90Sr0.1Al0.97Mg0.03O3-delta (LSAM) powders is about 136 nm measured by APS. The maximum shrinkage value of 20.6% and relative density of 95% are obtained sintered at 1600 degrees C for 5 h for 1000 degrees C-calcined LSAM powders. The total conductivity of 7.87 x10(-3) S cm(-1) at 800 degrees C for LSAM electrolyte is measured by AC impedance spectroscopy techniques in air. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：880 / 885

页数：6

共 34 条

[1] Synthesis and characterization of lanthanum aluminate powder at relatively low temperature [J].

Adak, AK ;

Pramanik, P .

MATERIALS LETTERS, 1997, 30 (04) :269-273

[2] THE ELECTROLYTIC PROPERTIES OF LAYO3 AND LAALO3 DOPED WITH ALKALINE-EARTH OXIDES [J].

ALCOCK, CB ;

FERGUS, JW ;

WANG, L .

SOLID STATE IONICS, 1992, 51 (3-4) :291-295

[3] Synthesis of Nb-doped SrTiO3 by a modified glycine-nitrate process [J].

Blennow, Peter ;

Hansen, Kent K. ;

Wallenberg, L. Reine ;

Mogensen, Mogens .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (13-15) :3609-3612

[4] Modified glycine nitrate procedure (MGNP) for the synthesis of SOFC nanopowders [J].

Boskovic, Snezana B. ;

Matovic, Branko Z. ;

Vlajic, Milan D. ;

Kristic, Vladimir D. .

CERAMICS INTERNATIONAL, 2007, 33 (01) :89-93

[5]

Boukamp B.A., 1998, EQUIVALENT CIRCUIT E

[6] Mixture of fuels approach for the solution combustion synthesis of LaAlO3 nanopowders [J].

Chandradass, J. ;

Kim, Ki Hyeon .

ADVANCED POWDER TECHNOLOGY, 2010, 21 (02) :100-105

[7] Size-controlled synthesis of LaAlO3 by reverse micelle method: Investigation of the effect of water-to-surfactant ratio on the particle size [J].

Chandradass, J. ;

Kim, Ki Hyeon .

JOURNAL OF CRYSTAL GROWTH, 2009, 311 (14) :3631-3635

[8] Comparison of dissolution behavior and ionic conduction between Sr and/or Mg doped LaGaO3 and LaA1O3 [J].

Chen, TY ;

Fung, KZ .

JOURNAL OF POWER SOURCES, 2004, 132 (1-2) :1-10

[9] GLYCINE NITRATE COMBUSTION SYNTHESIS OF OXIDE CERAMIC POWDERS [J].

CHICK, LA ;

PEDERSON, LR ;

MAUPIN, GD ;

BATES, JL ;

THOMAS, LE ;

EXARHOS, GJ .

MATERIALS LETTERS, 1990, 10 (1-2) :6-12

[10]

CHICK LA, 1992, MATER RES SOC SYMP P, V249, P159

← 1 2 3 4 →