纳米级铜粉的制备

研究了以ＣｕＳＯ４·５Ｈ２Ｏ 和ＮａＨ２ＰＯ２ 为主要原料制备纳米铜粉的初步工艺：２ ５６０ ｍＬｃ（ＣｕＳＯ４） ＝ ０ ．０７１５ ｍｏｌ／Ｌ的溶液（ 用ＮＨ３·Ｈ２Ｏ将其ｐＨ 值调到５ ．０ ，含ＯＰ分散剂４ ｍＬ） 与２４０ ｍＬｃ（ＮａＨ２ＰＯ２） ＝ １ ．０３２０ ｍｏｌ／Ｌ的溶液反应，溶液反应前的温度为５５ ～６６ ℃，ＮａＨ２ＰＯ２ 溶液的加入速率为８０ ｍＬ／ｍｉｎ ，搅拌强度为１２０ ｒ／ｍｉｎ 。用该工艺制备的纳米铜粉收率在９０ ％ 以上。ＸＲＤ 检测结果表明产物为单质铜；ＴＥＭ 检测结果表明这种铜粉的粒径为３０ ～５０ ｎｍ 。

Preparation of Nanon Copper Powder

A tentative technique of preparing nanon Cu powder with CuSO 4 and NaH 2PO 2 as main raw materials was proposed. 2650 mL c(CuSO 4)=0.0715 mol/L solution (its pH value was adjusted to 5.0 with NH 3·H 2O) containing 4 mL OP as a dispersing agent reacted with 240 mL c(NaH 2PO 2)=1.0320 mol/L solution.Both solutions were at the same temperature of 55-65 ℃ before reaction.The adding rate of NaH 2PO 2 solution was 80 mL/min,and the stirring strength for reaction was 120 r/min.The yield of the nanon Cu powder was over 90%.XRD examination showed that the product was elementary Cu. TEM determination showed that the Cu powder had a particle size within the range of 30-50nm.