Lanthanum strontium cobalt ferrite

Lanthanum strontium cobalt ferrite (LSCF), also called lanthanum strontium cobaltite ferrite is a specific ceramic oxide derived from lanthanum cobaltite of the ferrite group. It is a phase containing lanthanum(III) oxide, strontium oxide, cobalt oxide and iron oxide with the formula {{chem|La|x|Sr|1−x|Co|y|Fe|1−y|O|3}}, where 0.1≤x≤0.4 and 0.2≤y≤0.8.{{cite journal |last1=Chang |first1=Hun-Chieh |last2=Tsai |first2=Dah-Shyang |last3=Chung |first3=Wen-Hung |last4=Huang |first4=Ying-Sheng |last5=Le |first5=Minh-Vien |title=A ceria layer as diffusion barrier between LAMOX and lanthanum strontium cobalt ferrite along with the impedance analysis |journal=Solid State Ionics |date=27 April 2009 |volume=180 |issue=4–5 |pages=412–417 |doi=10.1016/j.ssi.2009.01.018}}

It is black in color and crystallizes in a distorted hexagonal perovskite structure.{{cite journal|last1=Kulkarni|first1=A.|last2=Ciacchi|first2=F.T.|last3=Giddey|first3=S.|last4=Munnings|first4=C.|last5=Badwal|first5=S.P.S.|last6=Kimpton|first6=J.A.|last7=Fini|first7=D.|title=Mixed ionic electronic conducting perovskite anode for direct carbon fuel cells|journal=International Journal of Hydrogen Energy|date=December 2012|volume=37|issue=24|pages=19092–19102|doi=10.1016/j.ijhydene.2012.09.141|bibcode=2012IJHE...3719092K }} LSCF undergoes phase transformations at various temperatures depending on the composition. This material is a mixed ionic electronic conductor with comparatively high electronic conductivity (200+ S/cm) and good ionic conductivity (0.2 S/cm).{{cite journal|last1=Badwal|first1=SPS|last2=Giddey|first2=S|last3=Munnings|first3=C|last4=Kulkarni|first4=A|title=Review of Progress in High Temperature Solid Oxide Fuel Cells |journal=Journal of the Australian Ceramics Society |date=2014|volume=50|issue=1}} It is typically non-stoichiometric and can be reduced further at high temperature in low oxygen partial pressures or in the presence of a reducing agent such as carbon.{{cite journal|last1=Munnings|first1=C.|last2=Kulkarni|first2=A.|last3=Giddey|first3=S.|last4=Badwal|first4=S.P.S.|title=Biomass to power conversion in a direct carbon fuel cell|journal=International Journal of Hydrogen Energy|date=August 2014|volume=39|issue=23|pages=12377–12385|doi=10.1016/j.ijhydene.2014.03.255|bibcode=2014IJHE...3912377M }}

LSCF is being investigated as a material for intermediate temperature solid oxide fuel cell cathodes and, potentially as a direct carbon fuel cell anode.

LSCF is also investigated as a membrane material for separation of oxygen from air, for use in e.g. cleaner burning power plants.{{Cite web|title=Ceramic Tubes Could Cut Greenhouse Gas Emissions From Power Stations|url=https://www.sciencedaily.com/releases/2007/08/070802201909.htm|access-date=2020-10-08|website=ScienceDaily|language=en}}