摘要
以ＮｉＳＯ４·６Ｈ２Ｏ为原料，Ｎ２Ｈ４·Ｈ２Ｏ为还原剂，ＮａＯＨ调节溶液的ｐＨ值，控制反应条件为：Ｎｉ２＋的浓度１．０ｍｏｌ·Ｌ－１；Ｎ２Ｈ４·Ｈ２Ｏ／Ｎｉ２＋为２．０；ＮａＯＨ／Ｎｉ２＋为１．０；反应温度为９０℃，将得到的沉淀物洗涤、干燥，得到了平均粒度为６２ｎｍ的超细镍粉。考察了反应条件对还原反应的影响，并对制备的粉末采用ＴＥＭ、ＸＲＤ、ＩＡＳ及ＢＥＴ法进行了表征。结果表明：本法制备的镍粉具有粒度小、分布均匀、纯度高等特点。ＮａＯＨ的加入量对镍粉的纯度有影响。
By using NiSO46H2O as material,N2H4H2O as reductant,NaOH adjusting pH value of the solution,ultrafine nickel powders can be prepared.The condition of reaction is as follows:concentration of Ni2+ is 1.0molL-1,N2H4H2O/Ni2+ is 2.0,NaOH/Ni2+ is 1.0 and reaction temperature is 90.The powders prepared were characterized by TEM,XRD,IAS,and BET method.The results show that the nickel powders prepared are spherical and average size is 62nm with narrow size distribution.The amount of NaOH affects the purity of nickel powders.
出处
《功能材料》
EI
CAS
CSCD
北大核心
1999年第3期263-264,267,共3页
Journal of Functional Materials
基金
辽宁省博士起动基金
关键词
镍粉
溶液还原
制备
超细粉末
ultrafine powders
nickel powders
solution reduction
