This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1007/s10853-009-3746-7 in citations.
Investigation of the quasi-ternary system LaMnO3-LaCoO3-"LaCuO3" II: The series LaMn0.25-xCo0.75-xCu2xO3 and LaMn0.75-xCo0.25-xCu2xO3
Investigation of the quasi-ternary system LaMnO3-LaCoO3-"LaCuO3" II: The series LaMn0.25-xCo0.75-xCu2xO3 and LaMn0.75-xCo0.25-xCu2xO3
This paper investigates the crystal structure, thermal expansion, and electrical conductivity of two series of perovskites (LaMn0.25-x Co0.75-x Cu-2x O3-delta and LaMn0.75-x Co0.25-x Cu-2x O3-delta with x = 0, 0.025, 0.05, 0.1, 0.15, 0.2, and 0.25) in the quasi-ternary system LaMnO3-LaCoO3-"LaC...
Saved in:
Personal Name(s): | Tietz, F. |
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Arul Raj, I. / Fu, Q.X. / Zahid, M. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEF-1 |
Published in: | Journal of materials science, 44 (2009) S. 4883 - 4891 |
Imprint: |
Dordrecht [u.a.]
Springer Science + Business Media B.V
2009
|
Physical Description: |
4883 - 4891 |
DOI: |
10.1007/s10853-009-3746-7 |
Document Type: |
Journal Article |
Research Program: |
Solid Oxide Fuel Cell Rationelle Energieumwandlung |
Series Title: |
Journal of Materials Science
44 |
Subject (ZB): | |
Publikationsportal JuSER |
This paper investigates the crystal structure, thermal expansion, and electrical conductivity of two series of perovskites (LaMn0.25-x Co0.75-x Cu-2x O3-delta and LaMn0.75-x Co0.25-x Cu-2x O3-delta with x = 0, 0.025, 0.05, 0.1, 0.15, 0.2, and 0.25) in the quasi-ternary system LaMnO3-LaCoO3-"LaCuO3". The Mn/Co ratio was found to have a stronger influence on these properties than the Cu content. In comparison to the Co-rich series (LaMn0.25-x Co0.75-x Cu-2x O3-delta), the Mn-rich series (LaMn0.75-x Co0.25-x Cu-2x O3-delta) showed a much higher Cu solubility. All compositions in this series were single-phase materials after calcination at 1100 A degrees C. The Co-rich series showed higher thermal expansion coefficients (alpha(max) = 19.6 x 10(-6) K-1) and electrical conductivity (sigma(max) = 730 S/cm at 800 A degrees C) than the Mn-rich series (alpha(max) = 10.6 x 10(-6) K-1, sigma(max) = 94 S/cm at 800 A degrees C). Irregularities in the thermal expansion curves indicated phase transitions at 150-350 A degrees C for the Mn-rich series, while partial melting occurred at 980-1000 A degrees C for the Co-rich series with x > 0.15. |