Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Crystal structure and high-temperature electrical conductivity of novel perovskite-related gallium and indium oxides
Show others and affiliations
Number of Authors: 92014 (English)In: Journal of Solid State Electrochemistry, ISSN 1432-8488, E-ISSN 1433-0768, Vol. 18, no 5, p. 1415-1423Article in journal (Refereed) Published
Abstract [en]

Novel complex oxides Sr2Ga1+x In1-x O-5, x = 0.0-0.2 with brownmillerite-type structure were prepared in air at T = 1,273 K, 24 h. Study of the crystal structure of Sr2Ga1.1In0.9O5 refined using X-ray powder diffraction data (S.G. Icmm, a = 5.9694(1) , b = 15.2091(3) , c = 5.7122(1) , chi (2) = 2.48, R (F) (2) (=) 0.0504, R (p) = 0.0458) revealed ordering of Ga3+ and In3+ cations over tetrahedral and octahedral positions, respectively. A partial replacement of Sr2+ by La3+ according to formula Sr1-y La (y) Ga0.5In0.5O2.5+y/2, leads to the formation of a cubic perovskite (a = 4.0291(5) ) for y = 0.3. No ordering of oxygen vacancies or cations was observed in Sr0.7La0.3Ga0.5In0.5O2.65 as revealed by electron diffraction study. The trace diffusion coefficient (D (T)) of oxygen for cubic perovskite Sr0.7La0.3Ga0.5In0.5O2.65 is in the range 2.0 Au 10(-9)-6.3 Au 10(-8) cm(2)/s with activation energy 1.4(1) eV as determined by isotopic exchange depth profile technique using secondary ion mass spectrometry at 973-1,223 K. These values are close to those reported for Ca-doped ZrO2. High-temperature electrical conductivity of Sr0.7La0.3Ga0.5In0.5O2.65 studied by AC impedance was found to be nearly independent on oxygen partial pressure. Calculated values of activation energy at T < 1,073 K for hole and oxide-ion conductivities are 0.96 and 1.10 eV, respectively.

Place, publisher, year, edition, pages
2014. Vol. 18, no 5, p. 1415-1423
Keywords [en]
Brownmillerites, Perovskites, Crystal structure, Oxygen diffusion, High-temperature conductivity, Thermal expansion
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-105213DOI: 10.1007/s10008-013-2190-4ISI: 000336311400024OAI: oai:DiVA.org:su-105213DiVA, id: diva2:732174
Funder
Swedish Research Council
Note

AuthorCount:9;

Available from: 2014-07-03 Created: 2014-06-24 Last updated: 2022-02-23Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records

Svensson, GunnarShen, Zhijian

Search in DiVA

By author/editor
Svensson, GunnarShen, Zhijian
By organisation
Department of Materials and Environmental Chemistry (MMK)
In the same journal
Journal of Solid State Electrochemistry
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 59 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf