超细钴粉

超细钴粉的制备工艺与表面改性技术研究

Study on the Preparation and Exterior Improvement of Ultrafine Cobalt Powder

首次实现了液相中还原制备超细钴粉，其粒径为0.2～0.3μm。

The ultrafine cobalt powder with an average size 0.2 ~ 0.3 μ m was prepared by chemical reduction in aqueous solution .

以自制Co（OH）2为原料，乙二醇为溶剂和还原剂，制得了分散性好的球形超细钴粉。

The ultrafine spheric Co powder with good dispersity was prepared with Co ( OH ) _2 being the raw material and glycol being the solvent and reductant .

多元醇液相还原法制备超细钴粉

Ultrafine Cobalt Powder Preparation by Liquid Phase Reduction with Polylols

重点研究了新型超细钴粉的制备技术及表面活性剂的作用机理和影响。

Study the condition and the best technique of preparation cobalt powder .

一种具有较低烧结温度的超细钴粉的制备及表征

Preparation and characterization of low sintering temperature ultra-fine cobalt powder

但该法要求的氢压较高，纯度也只能达到95%左右，很难达到超细钴粉产品的要求。

However , this method requires a higher hydrogen pressure and the purity can only reach about 95 % .

为了进一步提高我国硬质合金产品的质量，满足科技发展的需要，生产出优质的超细钴粉，本文对四种硬质合金用钴粉的生产工艺的原理及相应产品的性能进行了阐述和比较。

Principles of four processes for producing cobalt powders for hard alloys and properties of the corresponding products are compared .

高压氢还原法是在高压条件下，用氢气还原钴的溶液或浆体制备超细钴粉。

High-pressure hydrogen reduction method is to prepare ultrafine cobalt powder with the cobalt solution or slurry in the conditions of high pressure .

本文采用创新的、特殊的化学还原法，首次在水溶液中实现了一步还原法制备超细钴粉，并研究了在液相中制备超细钴粉的条件和大规模生产超细钴粉的途径。

In this paper , a new and special chemical reduction method is applied to the preparation of ultrafine cobalt powder in aqueous solution .

研究结果表明，试剂加入量和加入时间以及反应温度等各种因素对超细钴粉性能均有明显影响。

As the result showing , the add quantity of reagent and the time and reaction temperature were have evidence influence to the capability ultrafine cobalt .

21世纪科技的发展方向之一是纳米科技，超细钴粉、纳米钴粉尤其代表着钴粉新产品的发展方向。因此，超细钴粉的研制和应用是人们关注和研究的重点。

Ultrafine cobalt powder and nanometer cobalt powder are representative of cobalt powder , and so how to produce and use them is becoming a hot topic .

对醇-水和醇两种体系的还原反应分析表明，反应历程不同，超细钴粉的纯度和粒度也不同。

The analyses for polylol - water and polylol systems indicate that the different reaction mechanisms might result in the different purity and particle size of cobalt powder .

国内外钴粉的发展趋势主要有：超细钴粉和纳米钴粉，高密度钴粉和球形钴粉，高纯钴粉。

The cobalt develop direction of inside and outside including ultrafine cobalt powder and nano-cobalt powder , high density cobalt powder and sphericity cobalt powder , pure cobalt powder .

通过实验和结果分析，本文得到的结论如下：首次实现了在水相中一步还原制备钴粉，得到了粒径为0.2～0.3μm的超细钴粉；

And the results are as the followings : The ultrafine cobalt powder with an average size 0.2 ~ 0.3 μ m is prepared by chemical reduction in aqueous solution ;

由于超细钴粉具有较高的活性，在水溶液或者空气中容易被氧化，因此钴粉的后处理比较重要。本文对反应完毕后超细钴粉后处理方式进行了比较。

In addition , the methods of purification and collection are also studied , for they are important to ultrafine cobalt powder which is easily oxidated in water or air .

采用多元醇液相还原工艺，分别用1,2丙二醇和乙二醇作还原剂，制备出粒径小于1μm、具有面心立方晶体结构的超细钴粉。

The ultrafine cobalt powder with a face centered cubic structure and less than 1 μ m in size is synthesized by the liquid phase reduction process with 1,2-propanediol and glycol as reductive agents .

本文研究了从钴锂膜废料和硬质合金处理渣中回收生产氧化钴、氧化亚钴、超细钴粉等钴产品。

In this article the productions , such as cobalt oxide , cobaltous oxide and ultrafine cobalt powder , were recovered from the scraps of cobalt and lithium film and residues of treating hard alloys .

目前国内采取的超细钴粉制备方法及工艺都是比较复杂和高能耗的，成本比较高，而且获得钴粉颗粒都相对比较粗，不能完整地体现超细钴粉优异性能。

At present the preparation method in our country are comparatively complex and cost much energy , cost comparatively high and the granularity of cobalt powder is wide , can not perfectly embodiment the excellent capability .

考察了碱加入量、反应温度、催化剂用量、氢气分压、钴离子浓度、以及高温固相氢还原对超细钴粉性能的影响。

The research investigated the influence of the amount of alkali , reaction temperature , the amount of catalyst , hydrogen partial pressure , cobalt ion concentration , and high-temperature solid-phase hydrogen reduction on the ultrafine cobalt powder performance .

旋转闪蒸干燥机在超细镍钴合金粉生产中的应用

Application of Spin Flash Dryer on Nickel-Cobalt Composite Powder Production