本文選題：銅粉　切入點：抗壞血酸　出處：《中國有色金屬學報》2017年04期 　論文類型：期刊論文

【摘要】：研究以抗壞血酸為還原劑、采用液相還原法制備微納米銅粉過程中pH值、混合方式和混合速率對銅粉形貌和粒徑的影響。采用X射線衍射儀(XRD)和掃描電子顯微鏡(SEM)對合成產(chǎn)物進行表征。結(jié)果表明:液相反應溶液體系的pH值對反應產(chǎn)物的物相及其形貌有決定性的影響;當p H值控制為3~8時,還原產(chǎn)物為純銅相;當p H為9~12時,產(chǎn)物是金屬Cu與Cu_2O混合相;當p H值高于13時,還原產(chǎn)物為Cu_2O相;反向滴定即CuSO_4溶液向抗壞血酸溶液中滴定時制備的銅粉顆粒粗大呈微米級,正向滴定獲得的銅粉細小呈亞微米級;以快速傾倒方式獲得的銅粉顆粒尺寸分布窄且分散性良好,以慢速滴注獲得的銅粉的尺寸與形狀與前者的相近,但分布不均勻。
[Abstract]:Using ascorbic acid as reducing agent, the pH value in the process of preparation of nano-copper powder by liquid-phase reduction was studied. The effects of mixing mode and mixing rate on the morphology and particle size of copper powder were investigated by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The results showed that the pH value of liquid phase reaction solution system was the best for the reaction product. The phase and its morphology have a decisive effect. When pH value is 3 ~ 8:00, the reduction product is pure copper phase, when pH is 9 ~ 12:00, the product is a mixed phase of Cu and Cu_2O, when pH value is higher than 13:00, the reduction product is Cu_2O phase. In reverse titration, when CuSO_4 solution is titrated to ascorbic acid solution, the particle size of copper powder is of the size of micron, the particle size of copper powder obtained by forward titration is submicron, the size distribution of copper powder obtained by rapid tipping is narrow and the dispersion of copper powder is good. The size and shape of the copper powder obtained by slow dripping are similar to those of the former, but the distribution is not uniform.
【作者單位】： 東北大學材料各向異性與織構(gòu)教育部重點實驗室;東北大學中荷生物醫(yī)學與信息工程學院;
【基金】：國家自然科學基金資助項目(61372014)~~
【分類號】：TB383.3;TG146.11

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