Development of Proton Conductors Using Pyrochlore-Perovskite Phase Boundaries
The pyrochlore-perovskite binary systems La^sub 2^Zr^sub 2^O^sub 7^-SrZrO3 and La^sub 2^Zr^sub 2^O^sub 7^-LaYO3 were studied as potential high-temperature proton conductors. X-ray diffraction and direct current conductivity measurements were used to develop empirical relationships between structure...
Saved in:
Published in | Journal of materials engineering and performance Vol. 13; no. 3; pp. 303 - 308 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer Nature B.V
01.06.2004
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The pyrochlore-perovskite binary systems La^sub 2^Zr^sub 2^O^sub 7^-SrZrO3 and La^sub 2^Zr^sub 2^O^sub 7^-LaYO3 were studied as potential high-temperature proton conductors. X-ray diffraction and direct current conductivity measurements were used to develop empirical relationships between structure and conductivity. The solubilities of Sr in La^sub 2^Zr^sub 2^O^sub 7^ and La in SrZrO3 were low, less than 0.1 mol fraction. The solubility of Zr in LaYO3 was at least 0.125 mol fraction, and the solubility of Y in La^sub 2^Zr^sub 2^O^sub 7^ was at least 0.25 mol fraction. Y-doped La^sub 2^Zr^sub 2^O^sub 7^ had the highest electrical conductivity, though no composition exceeded σ=3×10^sup -4^ S/cm at the target temperature of 600 °C. The effectiveness of Y as a dopant in La^sub 2^Zr^sub 2^O^sub 7^ was limited because Y substituted for both La on the A-site and Zr on the B-site.[PUBLICATION ABSTRACT] |
---|---|
Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1059-9495 1544-1024 |
DOI: | 10.1361/10599490419270 |