Compositions – Electrically conductive or emissive compositions
Reexamination Certificate
2011-06-07
2011-06-07
Gulakowski, Randy (Department: 1766)
Compositions
Electrically conductive or emissive compositions
C075S244000, C427S243000, C419S010000, C419S012000, C429S432000, C501S098100
Reexamination Certificate
active
07955526
ABSTRACT:
A composite material (M) comprising: at least 75% by volume of a mixed electronic conductor compound oxygen anions O<2->(C1) selected from doped ceramic compounds which, at the temperature of use, are present in the form of a crystalline network having ion oxide lattice vacancies and, more particularly, in the form of a cubic phase, a fluorite phase, a perovskite phase, of the aurivillius variety, a Brown-Millerite phase or a pyrochlore phase; and 0.01%-25% by volume of a compound (C2) which is different from compound (C1), selected from oxide-type ceramic materials, non-oxide type ceramic materials, metals, metal alloys or mixtures of said different types of material; and 0%-2.5% by volume of a compound (C3) produced from at least one chemical reaction represented by the equation: xFC1+yFC2 - - - >zFC3, wherein FC1, FC2 and FC3 represent the raw formulae of compounds (C1), (C2) and (C3) and x, y and z represent rational numbers above or equal to 0. The invention also relates to a method for the preparation and use thereof as mixed conductor material for a membrane catalytic reactor used to synthesize synthetic gas by catalytic oxidation of methane or natural gas and/or as mixed conductor material for a ceramic membrane.
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PCT Int'l Search Report, PCT/FR2004/002851.
Chartier Thierry
Del Gallo Pascal
Etchegoyen Gregory
Cronin Christopher J.
Gulakowski Randy
L'Air Liquide, Societe Anonyme a Directoire et Conseil de Survei
Nguyen Khanh Tuan
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