| 摘要 |
PURPOSE:To produce fine Ag particles having a narrow particle size distribution by using L-ascorbic acid or a salt thereof as a reducing agent for Ag ions in an aq. AgNO3 soln. CONSTITUTION:AgNO3 crystals are dissolved in water and dil. nitric acid is added to prepare an aq AgNO3 soln. of 0.3-7pH. L-ascorbic acid or the Na, K or ammonium salt thereof as a reducing agent for Ag ions in the AgNO3 soln. is dissolved in water and the resulting aq. soln. is adjusted to >0.1pH. The AgNo3 soln. is reacted with the reducing agent soln. at 0-100 deg.C to deposit and produce fine Ag particles of 0.1mum average particle size. The particles have a narrow particle size distribution and the particle size can be regulated.
|
