Abstract
The Ruddlesden-Popper ferrite Sr3Fe2O6+δ and its titania-doped derivatives Sr3Fe2-xTixO6+δ, where 03Fe2O6+δ and Sr3Fe0.8Ti1.2 O6+δ in the temperature range 750-1000°C and oxygen partial pressures (pO2) varying between 10-20 and 0.5 atm revealed that the predominant partial conductivity of electrons is proportional to pO2 -1/4 in the low pO2 region, while the predominant partial contribution of holes to the conductivity is proportional to pO2 +1/4 in the high pO2 range. The pressure-independent oxygen ion conductivity is found to decrease with the increase in titanium content. A possible pathway for oxygen ion migration is discussed in relation to disorder in the oxygen sublattice and titanium doping.
| Original language | English |
|---|---|
| Pages (from-to) | 275-283 |
| Number of pages | 9 |
| Journal | Journal of Solid State Chemistry |
| Volume | 168 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Oct 2002 |
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Keywords
- Electron conductivity
- Oxygen conductivity
- Oxygen transfer
- Ruddlesden-Popper ferrite
- Thermopower
ASJC Scopus subject areas
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
Order-disorder enhanced oxygen conductivity and electron transport in Ruddlesden-Popper ferrite-titanate Sr3Fe2-xtixO6+δ . / Shilova, Y. A.; Patrakeev, M. V.; Mitberg, E. B.; Leonidov, I. A.; Kozhevnikov, V. L.; Poeppelmeier, Kenneth R.
In: Journal of Solid State Chemistry, Vol. 168, No. 1, 10.2002, p. 275-283.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Order-disorder enhanced oxygen conductivity and electron transport in Ruddlesden-Popper ferrite-titanate Sr3Fe2-xtixO6+δ
AU - Shilova, Y. A.
AU - Patrakeev, M. V.
AU - Mitberg, E. B.
AU - Leonidov, I. A.
AU - Kozhevnikov, V. L.
AU - Poeppelmeier, Kenneth R
PY - 2002/10
Y1 - 2002/10
N2 - The Ruddlesden-Popper ferrite Sr3Fe2O6+δ and its titania-doped derivatives Sr3Fe2-xTixO6+δ, where 03Fe2O6+δ and Sr3Fe0.8Ti1.2 O6+δ in the temperature range 750-1000°C and oxygen partial pressures (pO2) varying between 10-20 and 0.5 atm revealed that the predominant partial conductivity of electrons is proportional to pO2 -1/4 in the low pO2 region, while the predominant partial contribution of holes to the conductivity is proportional to pO2 +1/4 in the high pO2 range. The pressure-independent oxygen ion conductivity is found to decrease with the increase in titanium content. A possible pathway for oxygen ion migration is discussed in relation to disorder in the oxygen sublattice and titanium doping.
AB - The Ruddlesden-Popper ferrite Sr3Fe2O6+δ and its titania-doped derivatives Sr3Fe2-xTixO6+δ, where 03Fe2O6+δ and Sr3Fe0.8Ti1.2 O6+δ in the temperature range 750-1000°C and oxygen partial pressures (pO2) varying between 10-20 and 0.5 atm revealed that the predominant partial conductivity of electrons is proportional to pO2 -1/4 in the low pO2 region, while the predominant partial contribution of holes to the conductivity is proportional to pO2 +1/4 in the high pO2 range. The pressure-independent oxygen ion conductivity is found to decrease with the increase in titanium content. A possible pathway for oxygen ion migration is discussed in relation to disorder in the oxygen sublattice and titanium doping.
KW - Electron conductivity
KW - Oxygen conductivity
KW - Oxygen transfer
KW - Ruddlesden-Popper ferrite
KW - Thermopower
UR - http://www.scopus.com/inward/record.url?scp=0036814285&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036814285&partnerID=8YFLogxK
U2 - 10.1006/jssc.2002.9722
DO - 10.1006/jssc.2002.9722
M3 - Article
VL - 168
SP - 275
EP - 283
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 1
ER -