Effect of Granularity on Anti-Oxidizing Ability of Copper Nano-Powder
Taken KBH4 and vitamin C (VC) as reducers, CuSO4·5H2O as raw material, EDTA as complex agent and polyvinyl-pyrolidone (PVP) as protector, the copper nano-powder was prepared by the liquid reduction method. Placed the powders with different granularities in the air for a certain time, then the powders were examined by XRD. The results reveal that the anti-oxidizing ability depends on the granularity of the copper nano-powder: when the granularity of the copper nano-powder is bigger, the anti-oxidizing ability is better. If the granularity of the powder is bigger than 75nm, the powder is not easily oxidized in the air. The 75nm copper nano-powder samples begin to be oxidized at above 120℃. The melting point of the copper nano-powder is very low, so the particle will melt and grow up quickly when it is hit by the TEM electron clusters.
copper nano-powder liquid reduction KBH4 VC anti-oxidizing ability
LI Zai-yuan GONG Pan-wei ZHAI Yu-chun
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;School of Petrol
国际会议
北京
英文
126-129
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）