12cao . 7a12o3 compound clathrating active oxygen species and method for preparing the same
AssigneeJapan Science and Technology Corporation
InventorsHideo Hosono, Masahiro Hirano, Katsuro Hayashi
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Abstract
The present invention provides a 12CaO.7Al2O3 compound containing an O2− ion radical and/or an O− ion radical in a high concentration of 1020 cm−3 or more. This compound can be used as an oxidization catalyst, antibacterial agent, ion conductor, or electrode material for solid-oxide fuel cells.
Claims10
A 12CaO.7Al2O3 compound comprising an O2− ion radical and/or an O− ion radical serving as active oxygen species, said ion radical being clathrated in said compound in a concentration of 1020 cm−3 or more.
A method for producing a 12CaO.7Al2O3 compound comprising the steps of:
- preparing a raw material including calcium (Ca) and aluminum (Al) mixed with each other in an atomic equivalent ratio of 12:14;
- and
- reacting said raw material in a solid phase reaction at a sintering temperature ranging between 1200° C. or more and less than 1415° C., under a dry oxidization atmosphere with an oxygen partial pressure of 104 Pa or more and a water-vapor partial pressure of 102 Pa or less.
An oxidization catalyst comprising a 12CaO.7Al2O3 compound including an O2− ion radical and/or an O− ion radical serving as active oxygen species, said ion radical being clathrated in said compound in a concentration of 1020 cm−3 or more.
An antibacterial agent comprising a 1 2CaO.7Al2O3 compound including an O2− ion radical and/or an O− ion radical serving as active oxygen species, said ion radical being clathrated in said compound in a concentration of 1020 cm−3 or more.
An ion conductor comprising a 12CaO.7Al2O3 compound including an O2− ion radical and/or an O− ion radical serving as active oxygen species, said ion radical being clathrated in said compound in a concentration of 1020 cm−3 or more.
An electrode material for solid-oxide fuel cells, comprising a 12CaO.7Al2O3 compound including an O2− ion radical and/or an O− ion radical serving as active oxygen species, said ion radical being clathrated in said compound in a concentration of 1020 cm−3 or more.
Dependencies are inferred from the claim text.