Coprecipitation method for the manufacture of zinc oxyde...

Details Coprecipitation method for the manufacture of zinc oxyde... Coprecipitation method for the manufacture of zinc oxyde...

C - Chemistry, Metallurgy

01

G

23/266

C01G 9/02 (2006.01) H01B 3/10 (2006.01) H01C 7/112 (2006.01)

Patent

CA 1295807

ABSTRACT OF THE DISCLOSURE A method for manufacturing a zinc oxide based powder by coprecipitation with one or more additions is disclosed. The method comprises: - a step for the preparation of one or more solutions by dissolving defined quantities of salts of elements that go into the composition of the powder: zinc and addition(s). - a step for the preparation of a buffer solution pre-saturated by the said elements, the said buffer solution possessing a pH which is defined so as to cause the precipitation of the hydroxylated compounds of elements corresponding to the elements saturating the buffer solution, - a step during which the solutions are added to the said buffer solution, the drop in the pH being compensated for by the addition of a base and the volume of the buffer solution being kept constant by drawing off excess liquid, - a step during which the precipitate obtained is treated to obtain the said powder. 21

553400

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