Copper powder and conductive composition containing same
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsYoichi Kamikoriyama, Mami Yoshida, Hiroshi Imamura, Yuji Asano
Life of this patent
Estimating the term…
Abstract
There is provided a copper powder containing an organic compound containing carbon and nitrogen. The powder has a ratio of carbon content PC (mass %) to specific surface area SSA (m2/g), PC/SSA, of 0.005 to 0.1 and a ratio of nitrogen content PN (mass %) to specific surface area SSA (m2/g), PN/SSA, of 0.001 to 0.05. The organic compound preferably contains two or more of nitrogen atom per molecule and is preferably capable of forming a five-membered ring complex with copper. The organic compound preferably includes one or more of dimethyl glyoxime, ethylenediamine, and polyethyleneimine.
Claims6
A copper powder containing a carbon- and nitrogen-containing organic compound, having a ratio of carbon content PC (mass %) to specific surface area SSA (m2/g), PC/SSA, of 0.010 to 0.08, and a ratio of nitrogen content PN (mass %) to specific surface area SSA (m2/g), PN/SSA, of 0.002 to 0.04, and having a weight loss of 0.8 mass % or less when heated from 25° C. to 500° C. in a nitrogen atmosphere in thermogravimetry, said organic compound consisting of dimethyl glyoxime and covering the surface of a copper particle.
Dependencies are inferred from the claim text.