Patent 7947212 was granted and assigned to Ceres Intellectual Property Company Limited on May, 2011 by the United States Patent and Trademark Office.
The fabrication of ceria based electrolytes to densities greater than 97% of the theoretical achievable density at temperatures below 1200° C., preferably approximately 1000° C., is disclosed. The electrolyte has a concentration of divalent cations minus an adjusted concentration of trivalent cations of between 0.01 mole % and 0.1 mole %.