TPR-study of substitution effects on reducibility and oxidative non-stoichiometry of La(0.8)A ' 0.2MnO3+delta perovskites

Authors
Buciuman, FC Patcas, F Zsako, J
Citation
Fc. Buciuman et al., TPR-study of substitution effects on reducibility and oxidative non-stoichiometry of La(0.8)A ' 0.2MnO3+delta perovskites, J THERM ANA, 61(3), 2000, pp. 819-825
Citations number
13
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN journal
13886150 → ACNP
Volume
61
Issue
3
Year of publication
2000
Pages
819 - 825
Database
ISI
SICI code
1388-6150(2000)61:3<819:TOSEOR>2.0.ZU;2-1
Abstract
La(0.8)A'0.2MnO3+delta (A'=Sr, Ba, K, Cs) perovskites were studied by tempe rature-programmed reduction. The amount of non-stoichiometric oxygen was fo und to decrease from delta =0.16 for LaMnO3+delta to delta =0.07 (Sr-), 0.0 6 (Ba-), 0.07 (K-) and 0.03 (Cs-) substituted manganites. The reducibility at low and mean-temperatures (t < 500 degreesC) increased in the sequence L a less than>(*) over bar * (La, Sr)approximate to>(*) over bar * (La, Ba)le ss than>(*) over bar * (La, Cs)less than>(*) over bar * (La, K).