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
Strontium oxide or strontia, SrO, is formed when strontium reacts with oxygen. Burning strontium in air results in a mixture of strontium oxide and strontium nitride. It also forms from the decomposition of strontium carbonate SrCO3. It is a stron ...
,
cobalt oxide and
iron oxide
Iron oxides are chemical compounds composed of iron and oxygen. Several iron oxides are recognized. All are black magnetic solids. Often they are non-stoichiometric. Oxyhydroxides are a related class of compounds, perhaps the best known of whic ...
with the formula , where 0.1≤''x''≤0.4 and 0.2≤''y''≤0.8.
It is black in color and crystallizes in a distorted hexagonal
perovskite structure
A perovskite is any material with a crystal structure following the formula ABX3, which was first discovered as the mineral called perovskite, which consists of calcium titanium oxide (CaTiO3). The mineral was first discovered in the Ural mou ...
.
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). It is typically
non-stoichiometric
In chemistry, non-stoichiometric compounds are chemical compounds, almost always solid inorganic compounds, having elemental composition whose proportions cannot be represented by a ratio of small natural numbers (i.e. an empirical formula); mos ...
and can be reduced further at high temperature in low oxygen partial pressures or in the presence of a reducing agent such as carbon.
LSCF is being investigated as a material for intermediate temperature
solid oxide fuel cell
A solid oxide fuel cell (or SOFC) is an electrochemical conversion device that produces electricity directly from oxidizing a fuel. Fuel cells are characterized by their electrolyte material; the SOFC has a solid oxide or ceramic electrolyte.
A ...
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.
See also
*
Lanthanum strontium manganite
Lanthanum strontium manganite (LSM or LSMO) is an oxide ceramic material with the general formula La1−xSrxMnO3, where ''x'' describes the doping level.
It has a Perovskite (structure), perovskite-based crystal structure, which has the general f ...
(LSM)
*
Lanthanum strontium ferrite (LSF)
*
Lanthanum calcium manganite (LCM)
*
Lanthanum strontium chromite (LSC)
*
Lanthanum strontium gallate magnesite (LSGM)
References
External links
LSCF supplier and infoAmerican Elements
American Elements is a global manufacturer and distributor of advanced materials with a more than 35,000-page online product catalog and compendium of information on the chemical elements, advanced materials, and high technology applications. The ...
Ceramic materials
Fuel cells
Lanthanum compounds
Strontium compounds
Cobalt compounds
Oxides
Non-stoichiometric compounds
Ferrites
{{material-stub