Oxygen stoichiometry and chemical expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-δ measured by in situ neutron diffraction

被引:306
作者
McIntosh, S
Vente, JF
Haije, WG
Blank, DHA
Bouwmeester, HJM
机构
[1] Univ Twente, Dept Sci & Technol, NL-7500 AE Enschede, Netherlands
[2] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
[3] Energy Res Ctr Netherlands, NL-1755 ZG Petten, Netherlands
关键词
D O I
10.1021/cm052763x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The structure, oxygen stoichiometry, and chemical and thermal expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) between 873 and 1173 K and oxygen partial pressures of 1 x 10(-3) to 1 atm were determined by in situ neutron diffraction. BSCF has a cubic perovskite structure, space group Pm3m, across the whole T-pO(2) region investigated. The material is highly oxygen deficient. with a maximum oxygen stoichiometry (3 - delta) of 2.339(12) at 873 K and a pO(2) of 1 atm and a minimum of 2.192(15) at 1173 K and a pO(2) of 10(-3) atm. Good agreement is obtained between oxygen stoichiometry data determined by neutron diffraction and thermogravimetry. In the range covered by the experiments, the thermal and chemical expansion coefficients are 19.0(5)-20.8(6) x 10(-6) K-1 and 0.016(2)-0.026(4), respectively.
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页码:2187 / 2193
页数:7
相关论文
共 36 条
[1]  
Adler SB, 2001, J AM CERAM SOC, V84, P2117, DOI 10.1111/j.1151-2916.2001.tb00968.x
[2]   Dimensional instability of doped lanthanum chromite [J].
Armstrong, TR ;
Stevenson, JW ;
Pederson, LR ;
Raney, PE .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (09) :2919-2925
[3]   Chemically-induced stresses in ceramic oxygen ion-conducting membranes [J].
Atkinson, A ;
Ramos, TMGM .
SOLID STATE IONICS, 2000, 129 (1-4) :259-269
[4]   Crystal structure and magnetic properties of SrCaMnGaO5+δ [J].
Battle, PD ;
Bell, AMT ;
Blundell, SJ ;
Coldea, AI ;
Gallon, DJ ;
Pratt, FL ;
Rosseinsky, MJ ;
Steer, CA .
JOURNAL OF SOLID STATE CHEMISTRY, 2002, 167 (01) :188-195
[5]  
BOUWMEESTER HJM, 2005, MIXED IONIC ELECT CO
[6]   Thermal and chemical expansion of Sr-doped lanthanum cobalt oxide (La1-xSrxCoO3-δ) [J].
Chen, XY ;
Yu, JS ;
Adler, SB .
CHEMISTRY OF MATERIALS, 2005, 17 (17) :4537-4546
[7]  
FROMENT GF, 1990, CHEM REACTOR REACTOR
[8]   Phase equilibrium and electrical conductivity of SrCo0.8Fe0.2O3-δ [J].
Grunbaum, N ;
Mogni, L ;
Prado, F ;
Caneiro, A .
JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (07) :2350-2357
[9]   A NEUTRON-DIFFRACTION STUDY OF 2 STRONTIUM COBALT IRON-OXIDES [J].
HARRISON, WTA ;
LEE, TH ;
YANG, YL ;
SCARFE, DP ;
LIU, LM ;
JACOBSON, AJ .
MATERIALS RESEARCH BULLETIN, 1995, 30 (05) :621-630
[10]   High temperature properties of La0.6Sr0.4Co0.8Fe0.2O3-δ oxygen nonstoichiometry and chemical diffusion constant [J].
Katsuki, M ;
Wang, SR ;
Dokiya, M ;
Hashimoto, T .
SOLID STATE IONICS, 2003, 156 (03) :453-461