Dimensional instability of doped lanthanum chromite

Timothy R. Armstrong, Jeffry W. Stevenson, Larry R. Pederson, Paige E. Raney

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

Lattice expansion, phase stability, and dimensional stability of doped lanthanum chromites have been examined over a wide range of temperatures and oxygen partial pressures. Reduction of doped lanthanum chromite resulted in a linear expansion of the sample that was dependent on the acceptor (Sr, Ca) concentration, temperature, oxygen partial pressure, and oxygen content within the sample. Additional doping with aliovalent B-site additives significantly reduced lattice expansion in reducing environments. The lattice expansion in reducing environments was directly related to the loss of lattice oxygen and the simultaneous reduction of Cr4+ to Cr3+ to maintain electroneutrality.

Original languageEnglish
Pages (from-to)2919-2925
Number of pages7
JournalJournal of the Electrochemical Society
Volume143
Issue number9
Publication statusPublished - Sep 1996
Externally publishedYes

Fingerprint

Lanthanum
Chromite
chromites
lanthanum
Oxygen
expansion
oxygen
Partial pressure
partial pressure
dimensional stability
Phase stability
Dimensional stability
Doping (additives)
Temperature
temperature

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Armstrong, T. R., Stevenson, J. W., Pederson, L. R., & Raney, P. E. (1996). Dimensional instability of doped lanthanum chromite. Journal of the Electrochemical Society, 143(9), 2919-2925.

Dimensional instability of doped lanthanum chromite. / Armstrong, Timothy R.; Stevenson, Jeffry W.; Pederson, Larry R.; Raney, Paige E.

In: Journal of the Electrochemical Society, Vol. 143, No. 9, 09.1996, p. 2919-2925.

Research output: Contribution to journalArticle

Armstrong, TR, Stevenson, JW, Pederson, LR & Raney, PE 1996, 'Dimensional instability of doped lanthanum chromite', Journal of the Electrochemical Society, vol. 143, no. 9, pp. 2919-2925.
Armstrong TR, Stevenson JW, Pederson LR, Raney PE. Dimensional instability of doped lanthanum chromite. Journal of the Electrochemical Society. 1996 Sep;143(9):2919-2925.
Armstrong, Timothy R. ; Stevenson, Jeffry W. ; Pederson, Larry R. ; Raney, Paige E. / Dimensional instability of doped lanthanum chromite. In: Journal of the Electrochemical Society. 1996 ; Vol. 143, No. 9. pp. 2919-2925.
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