Abstract
The electrical properties of the strontium ferrite are reported within the temperature range 700 to 950°C and the oxygen partial pressure range between 10-18 and 0.3 atm. The observed pressure and temperature dependencies of the conductivity in the brownmillerite form of the ferrite are related to the transition of the electron conductivity from the intrinsic regime, which is governed by the band gap of about 2 eV, to the extrinsic regime, which is controlled by the extrastoichiometric oxygen in the brownmillerite phase. The brownmillerite phase is shown to be a mixed conductor with the oxygen conductivity rising to about 0.1 S/cm at 850-900°C and Po2>10-17 atm. The perovskite-like layers in the brownmillerite structure provide a possible pathway for the ion migration.
| Original language | English |
|---|---|
| Pages (from-to) | 320-326 |
| Number of pages | 7 |
| Journal | Journal of Solid State Chemistry |
| Volume | 158 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2001 |
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Keywords
- Brownmillerite
- Conductivity
- Oxygen transfer
- Perovskite
- Strontium ferrite
- Thermopower
ASJC Scopus subject areas
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
Electrical properties of the ferrite SrFeOy at high temperatures. / Kozhevnikov, V. L.; Leonidov, I. A.; Patrakeev, M. V.; Mitberg, E. B.; Poeppelmeier, Kenneth R.
In: Journal of Solid State Chemistry, Vol. 158, No. 2, 2001, p. 320-326.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrical properties of the ferrite SrFeOy at high temperatures
AU - Kozhevnikov, V. L.
AU - Leonidov, I. A.
AU - Patrakeev, M. V.
AU - Mitberg, E. B.
AU - Poeppelmeier, Kenneth R
PY - 2001
Y1 - 2001
N2 - The electrical properties of the strontium ferrite are reported within the temperature range 700 to 950°C and the oxygen partial pressure range between 10-18 and 0.3 atm. The observed pressure and temperature dependencies of the conductivity in the brownmillerite form of the ferrite are related to the transition of the electron conductivity from the intrinsic regime, which is governed by the band gap of about 2 eV, to the extrinsic regime, which is controlled by the extrastoichiometric oxygen in the brownmillerite phase. The brownmillerite phase is shown to be a mixed conductor with the oxygen conductivity rising to about 0.1 S/cm at 850-900°C and Po2>10-17 atm. The perovskite-like layers in the brownmillerite structure provide a possible pathway for the ion migration.
AB - The electrical properties of the strontium ferrite are reported within the temperature range 700 to 950°C and the oxygen partial pressure range between 10-18 and 0.3 atm. The observed pressure and temperature dependencies of the conductivity in the brownmillerite form of the ferrite are related to the transition of the electron conductivity from the intrinsic regime, which is governed by the band gap of about 2 eV, to the extrinsic regime, which is controlled by the extrastoichiometric oxygen in the brownmillerite phase. The brownmillerite phase is shown to be a mixed conductor with the oxygen conductivity rising to about 0.1 S/cm at 850-900°C and Po2>10-17 atm. The perovskite-like layers in the brownmillerite structure provide a possible pathway for the ion migration.
KW - Brownmillerite
KW - Conductivity
KW - Oxygen transfer
KW - Perovskite
KW - Strontium ferrite
KW - Thermopower
UR - http://www.scopus.com/inward/record.url?scp=0034806464&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034806464&partnerID=8YFLogxK
U2 - 10.1006/jssc.2001.9120
DO - 10.1006/jssc.2001.9120
M3 - Article
AN - SCOPUS:0034806464
VL - 158
SP - 320
EP - 326
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 2
ER -