Method for making lead-rich and bismuth-rich pyrochlore...

Details Method for making lead-rich and bismuth-rich pyrochlore... Method for making lead-rich and bismuth-rich pyrochlore...

C - Chemistry, Metallurgy

01

B

23/224

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

Patent

CA 1097482

ABSTRACT OF THE DISCLOSURE A liquid solution method of preparing electrically conductive pyrochlore compounds of high surface area, having the formula: A2[B2-XAX]07-y is disclosed wherein A is selected from lead, bismuth and mixtures thereof, B is selected from ruthenium, iridium and mixtures thereof, O<x<1,0 and O<y<l. 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 at a temperature below about 200°C for a sufficient time for reaction to occur.

316046

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