The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2007
Filed:
Oct. 17, 2002
Hideo Hosono, Yamato, JP;
Masahiro Hirano, Tokyo, JP;
Katsuro Hayashi, Kawasaki, JP;
Japan Science and Technology Agency, Kawaguchi-shi, JP;
Abstract
There is provided a C12A7 compound capable of selectively and reversibly clathrating Xions, such as active oxygen radicals, with improved controllability. The C12A7 compound clathrating OHions and Onat a concentration of 2×10cmor less can be prepared by subjecting a mixed material containing Ca and Al to a solid phase reaction at a firing temperature not lower than 1200° C. and lower than 1449° C. in a dry oxygen atmosphere having an oxygen partial pressure of 0.1 atm or more and a water vapor partial pressure of 10atm or less, keeping the resultant product at a temperature of 1200° C. or higher, and cooling rapidly. The C12A7 compound is heat-treated to clathrate OHions at a concentration of 2×10cmor less, and Onat a high concentration of more than 2×10cm. The compound can reversibly clathrate or release Onion radicals through the elevation or lowering of the temperature thereof in a temperature range of 300 to 850° C. The compound is useful for an oxidation catalyst, an anti-bacterial agent, an ion conducting material, an electrode for a solid-electrolyte fuel cell, and the like.