Method of producing fine-particle copper powders
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United States of America Patent
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Jul 28, 2009
Grant Date -
Sep 13, 2007
app pub date -
Mar 14, 2007
filing date -
Apr 20, 2005
priority date (Note) -
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Abstract
Methods for producing finely divided copper or copper alloy powders are described, from compositions containing metal ions and an alkanolamine, preferably monoethanolamine, wherein the alkanolamine acts as a primary reducing agent. In preferred embodiments the methods for producing micron and submicron copper powder utilize precursor compositions containing copper ions in the form of submicron particles of copper carbonate, copper hydroxide, copper oxides, or any combination thereof, and utilize monoethanolamine (or optionally but less preferably hydrazine), and preferably additionally containing caustic and a reducing sugar.
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