Flaky Copper Powder, Method For Producing The Same, And Conductive Paste
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example 1
[0082] Pure water (6 L) kept at 70° C. was added with 4 kg of copper sulfate pentahydrate, 120 g of aminoacetic acid and 50 g of sodium phosphate with stirring, and the resulting aqueous solution was further added with pure water to 8 L and continuously kept stirred for 30 minutes.
[0083] Next, the aqueous solution was added, while it was kept stirred, with 5.8 kg of a 25 wt % aqueous solution of sodium hydroxide, kept stirred for 30 minutes, and further added with 1.5 kg of glucose, and kept stirred for 30 minutes.
[0084] Then, the resulting aqueous solution was added, while it was kept stirred, with 1 kg of 100 wt % hydrated hydrazine (N2H4·H2O) slowly taking 5 minutes, and kept stirred for 1 hour to complete the reaction.
[0085] On completion of the reaction, the resulting slurry was filtered using a Buchner funnel, and the precipitate was rinsed with pure water and then rinsed with methanol, and dried to prepare the flaky copper powder.
[0086] The flaky copper powder was analyze...
example 2
[0092] Pure water (6 L) kept at 70° C. was added with 4 kg of copper sulfate pentahydrate, 120 g of aminoacetic acid and 75 g of sodium phosphate with stirring, and the resulting aqueous solution was further added with pure water to 8 L and continuously kept stirred for 30 minutes.
[0093] Next, the aqueous solution was added, while it was kept stirred, with 5.8 kg of a 25 wt % aqueous solution of sodium hydroxide, kept stirred for 30 minutes, and further added with 1.5 kg of glucose, and kept stirred for 30 minutes.
[0094] Then, the resulting aqueous solution was added, while it was kept stirred, with 1 kg of 100 wt % hydrated hydrazine (N2H4·H2O) slowly taking 30 minutes, and kept stirred for 1 hour to complete the reaction.
[0095] On completion of the reaction, the resulting slurry was filtered using a Buchner funnel, and the precipitate was rinsed with pure water and then rinsed with methanol and dried to prepare the flaky copper powder.
[0096] The flaky copper powder was analyze...
example 3
[0099] Pure water (6 L) kept at 70° C. was added with 4 kg of copper sulfate pentahydrate, 120 g of aminoacetic acid and 75 g of sodium phosphate with stirring, and the resulting aqueous solution was further added with pure water to 8 L and continuously kept stirred for 30 minutes.
[0100] Next, the aqueous solution was added, while it was kept stirred, with 5.8 kg of a 25 wt % aqueous solution of sodium hydroxide, kept stirred for 30 minutes, and further added with 1.5 kg of glucose, and stirring was continued for 30 minutes.
[0101] Then, the resulting aqueous solution was added, while it was kept stirred, with 1 kg of 100 wt % hydrated hydrazine (N2H4·H2O) slowly taking 30 minutes, and kept stirred for 1 hour to complete the reaction.
[0102] On completion of the reaction, the resulting slurry was filtered using a Buchner funnel, and the precipitate was rinsed with pure water and then with methanol. The filtration residue was immersed for one hour in a methanol solution which is obt...
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Abstract
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