Electrolysis: processes – compositions used therein – and methods – Electroforming or composition therefor – Powder – flakes – or colloidal particles
Patent
1994-09-09
1995-10-31
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electroforming or composition therefor
Powder, flakes, or colloidal particles
204105R, 204123, 75612, C25C 502
Patent
active
054626471
ABSTRACT:
A process for the preparation of lead-zirconium-titanium (PZT) film and powder compositions. The process comprises the steps of providing an electrodeposition bath, providing soluble salts of lead, zirconium and titanium metals to this bath, electrically energizing the bath to thereby direct ions of each respective metal to a substrate electrode and cause formation of metallic particles as a recoverable film of PZT powder on the electrode, and also recovering the resultant film as a powder. Recovery of the PZT powder can be accomplished by continually energizing the bath to thereby cause powder initially deposited on the substrate-electrode to drop therefrom into the bath from which it is subsequently removed. A second recovery alternative comprises energizing the bath for a period of time sufficient to cause PZT powder deposition on the substrate-electrode only, from which it is subsequently recovered. PZT film and powder so produced can be employed directly in electronic applications, or the film and powder can be subsequently oxidized as by an annealing process to thereby produce lead-zirconium-titanium oxide for use in electronic applications.
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W. E. Reid, et al., "Electrodeposition of Metals from Organic Soln's: III," J. Electrochem. Soc. v. 104 No. 1 pp. 21-29 (Jan. 1957).
A. Brenner, "Electrodeposition of Metals from Organic Soln's: I," J. Electrochem. Soc. v. 103 No. 12 pp. 652-656 (Dec. 1965).
Bhattacharya Raghu N.
Ginley David S.
Mee Brendan
Midwest Research Institute
Niebling John
O'Connor Edna M.
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