Loading…
Thermodynamic stability, structural and electrical characterization of mixed ionic and electronic conductor La2Mo2O8.96
Thermogravimetric analysis (TGA) technique in controlled oxygen partial pressure ( p O 2 ) atmospheres has been used to obtain equilibrium oxygen content data as a function of p O 2 on the La 2 Mo 2 O 9− δ system resulting from the partial reduction of fast oxide-ion conductor La 2 Mo 2 O 9 (LM). Th...
Saved in:
| Published in: | Dalton transactions : an international journal of inorganic chemistry 2012-01, Vol.41 (24), p.7266-7271 |
|---|---|
| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Thermogravimetric analysis (TGA) technique in controlled oxygen partial pressure (
p
O
2
) atmospheres has been used to obtain equilibrium oxygen content data as a function of
p
O
2
on the La
2
Mo
2
O
9−
δ
system resulting from the partial reduction of fast oxide-ion conductor La
2
Mo
2
O
9
(LM). Thermodynamic conditions for stabilization of crystalline La
7
Mo
7
O
30
and amorphous La
2
Mo
2
O
7−
y
at 718 °C have been determined and discussed. At 608 °C, the compound reported for the first time La
2
Mo
2
O
8.96
(LM896) has been found. The crystalline form and transition temperature in LM896 have been identified by X-ray diffraction at room temperature (XRD) and at controlled temperature. Conductivity curves obtained by electrochemical impedance spectroscopy (EIS) as a function of temperature for both LM and LM896 have been compared. The results indicate that LM896 is a mixed ionic and electronic conductor (MIEC).
We report mixed electronic and ionic conductivity in the stable La
2
Mo
2
O
8.96
compound. |
|---|---|
| ISSN: | 1477-9226 1477-9234 |
| DOI: | 10.1039/c2dt30261f |