Abstract
In this work, a novel method of preparing copper powder having the required properties for thick film applications was investigated. This method involves the precipitation of copper powder by hydrogen reduction under pressure from Kelex 100-decanol-Versatic 10-kerosene media. The parameters studied were temperature (453 to 573 K), hydrogen pressure (1.03 to 3.79 MPa) time, use of additives, solvent composition,etc. Powders with the following excellent properties were produced:d 50 = 1 μm; 80 pct spread −1.3 + 0.7 μm; specific surface area = 1 ±0.2 m2/g, spheroidal shape; and 0.056 wt pct oxygen content.
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