| 摘要 |
PURPOSE:To produce mono-dispersed fine copper particles having a narrow particle size distribution by reducing an aq. copper sulfate soln. with a hydrazine compd. CONSTITUTION:The pH of an aq. copper sulfate soln. is adjusted to about 0.5-4 by adding dil. sulfuric acid or the like. The pH of an aq. soln. of a hydrazine compd. such as hydrazine hydrate is adjusted to about 3-10 by adding dil. sulfuric acid or the like. The temps. of the solns. are regulated to about 10-60 deg.C and the hydrazine compd. soln. is added to the copper sulfate soln. with stirring to reduce copper ions in the copper sulfate soln. The resulting fine copper particles are separated by filtration and washed. Thus, mono- dispersed fine copper particles having a narrow particle size distribution can be produced under control on particle size.
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