Study on Preparation of 90g: 10g Ni - Ag Composite Nano-powders by hydrogen reducing

摘要

Ni(OH)2 - Ag2O powders was prepared with materials NaOH，NiNO3·6H2O and AgNO3 by chemical co-precipitation method. The reaction conditions were that: Ni(NO3)2·6H2O and AgNO3 composite solution concentration was 0.0943 mol·L-1 and 0.0057 mol·L-1, NaOH solution concentration was 4 mol·L-1, dropping speed was 50 ml·min-1, Ph value of reacting terminal was 13, stirring speed 1200 r·min-1, reacting temperature was 25℃, reacting time 60 min. The Ni(OH)2 - Ag2O composite powders size was 35-45 nm. The Ni - Ag composite powders was prepared with materials Ni(OH)2 - Ag2O composite powders by hydrogen reduction in closed circular system. The Ni-Ag composite powders size was 35-50 nm.