Method of preparation of silver composite high temperature ceramic superconductors by precipitation

Patent · Tue Jun 29 00:00:00 EDT 1993

OSTI ID:6460813

Agarwala, A K; Christian, P A; Quinn, K B

A method for preparing a silver/superconducting ceramic composite is described, comprising the steps of: (1) forming an aqueous solution of metal salts including silver and comprised of the metals that can constitute part of the ceramic and or pyrolyzable counter anions, said metal salts being present in a stoichiometric proportion necessary to form said composite ceramic; (2) forming an aqueous solution comprising an alkaline hydroxide and carbonate anions; (3) mixing said solutions together for yielding a coprecipitate with a cation ratio required for a final composite superconducting ceramic; (4) filtering the step (3) coprecipitate; (5) washing the step (4) coprecipitate until its filtrate pH is less than 10; (6) drying the step (5) washed coprecipitate for producing a dried composite precursor; (7) calcining the step (6) precursor for producing a silver composite ceramic; and (8) milling the calcined composite powder comprising a uniform distribution of silver around the ceramic superconductor grains.

• Assignee: Eastman Kodak Co., Rochester, NY (United States)
• Patent Number(s): US 5223480; A
• Application Number: PPN: US 7-689226
• OSTI ID: 6460813
• Resource Relation: Patent File Date: 22 Apr 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SUPERCONDUCTING COMPOSITES
FABRICATION
AQUEOUS SOLUTIONS
CERAMICS
COPRECIPITATION
MIXING
POWDERS
SILVER
STOICHIOMETRY
COMPOSITE MATERIALS
DISPERSIONS
ELEMENTS
MATERIALS
METALS
MIXTURES
PRECIPITATION
SEPARATION PROCESSES
SOLUTIONS
TRANSITION ELEMENTS
360601* - Other Materials- Preparation & Manufacture