Method of making stoichiometric lead and bismuth pyrochlore...

Details Method of making stoichiometric lead and bismuth pyrochlore... Method of making stoichiometric lead and bismuth pyrochlore...

C - Chemistry, Metallurgy

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C01B 13/14 (2006.01) C01G 55/00 (2006.01) C25B 11/04 (2006.01) H01B 1/08 (2006.01) H01M 4/90 (2006.01) H01M 12/06 (2006.01)

Patent

CA 1105235

(U.S. 938,374) ABSTRACT OF THE DISCLOSURE A liquid solution method of preparing electrically conductive pyrochlore compounds having the formula: A2B2O7-y is disclosed wherein A is selected from lead, bismuth and mixtures thereof, B is selected from ruthemium, iridium and mixtures thereof, and 0<y<1. The method involves reacting A and B cations to yield a pyrochlore oxide by precipitation of A and B cations from an aqueous solution source of these cations in a liquid alkaline medium having a pH of at least about 13.5 in the presence of an oxygen source sufficient to complete the desired stoichiometry, at a temperature below about 200°C for a sufficient time for reaction to occur.

324813

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