A kind of nano cobalt powder slurry and preparation method thereof

A nano-cobalt, slurry technology, applied in mixing methods, chemical instruments and methods, dissolution and other directions, can solve the problems of many components, affecting the properties and practicability of nano-materials, and many impurities

Inactive Publication Date: 2011-11-30
BEIJING NACHEN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods also have many components and many impurities introduced ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A nano-cobalt powder slurry, the nano-cobalt powder slurry is composed of the following components in parts by weight (g): 8.5 for nano-cobalt powder with a particle diameter of 30nm, 0.3 for silane coupling agent KH570, and 85 for ethanol; The chemical name of the silane coupling agent KH570 is: γ-(methacryloyloxy)propyltrimethoxysilane;

[0029] The preparation method of the above-mentioned nano-scale cobalt powder slurry comprises the following steps:

[0030] (1) Add silane coupling agent KH570 into ethanol according to the proportion, and stir evenly;

[0031] (2) Nano cobalt powder is dropped in the above-mentioned mixed solution;

[0032] (3) Ultrasonic dispersion for 20 minutes;

[0033] (4) ball milling with a planetary ball mill for 0.5 hour to make a slurry;

[0034] (5) Remove the ball mill tank and pour out the slurry.

[0035] The prepared slurry is a black gray emulsion, and the light transmittance of the slurry is 15% as measured by an ultraviolet-vi...

Embodiment 2

[0037] A kind of nano cobalt powder slurry, by weight (g) this nano cobalt powder slurry is made up of following components: the nano cobalt powder that particle diameter is 20nm is 5, silane coupling agent KH570 is 0.25, ethylene glycol is 100; the chemical name of the silane coupling agent KH570 is: γ-(methacryloyloxy)propyltrimethoxysilane;

[0038] The preparation method of the above-mentioned nano-scale cobalt powder slurry comprises the following steps:

[0039] (1) Add silane coupling agent KH570 into ethylene glycol according to the proportion, and stir evenly;

[0040](2) Nano cobalt powder is dropped in the above-mentioned mixed solution;

[0041] (3) Ultrasonic dispersion for 5 minutes;

[0042] (4) use planetary ball mill ball milling for 0.6 hour to make slurry;

[0043] (5) Remove the ball mill tank and pour out the slurry.

[0044] The prepared slurry is a black gray emulsion, and the light transmittance of the slurry is 12% as measured by an ultraviolet-vis...

Embodiment 3

[0046] A nano-cobalt powder slurry, the nano-cobalt powder slurry is composed of the following components in parts by weight (g): a particle size of 30nm nano-cobalt powder is 3, oleic acid is 0.3, and chloroform is 96;

[0047] The preparation method of the above-mentioned nano-scale cobalt powder slurry comprises the following steps:

[0048] (1) Oleic acid is added in the chloroform by proportioning, stirs;

[0049] (2) Nano cobalt powder is dropped in the above-mentioned mixed solution;

[0050] (3) Ultrasonic dispersion for 10 minutes;

[0051] (4) ball milling with a planetary ball mill for 0.3 hour to make a slurry;

[0052] (5) Remove the ball mill tank and pour out the slurry.

[0053] The prepared slurry is a black gray emulsion, and the light transmittance of the slurry is 17% as measured by an ultraviolet-visible spectrophotometer. Take part of the slurry and pour it into a centrifuge tube with a diameter of 2cm and a liquid column height of 8cm. Centrifuge at ...

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Abstract

The invention discloses a nano cobalt powder slurry. The nano cobalt powder slurry is composed of the following components in parts by weight: 0.5-20 nano cobalt powder, 0.05-3 dispersant, and 85-100 solvent; Wherein the dispersant is anionic alkyl salt, polymer compound, fatty acid, fatty acid salt or alkali metal phosphate, silane coupling agent, titanate coupling agent; the solvent is alcohols, water, ketones , Esters, aliphatic hydrocarbons, alicyclic hydrocarbons, halogenated hydrocarbons, aromatic hydrocarbons. The preparation method comprises the following steps: (1) adding the dispersant into the solvent according to the proportion and stirring evenly; (2) putting the nano-cobalt powder into the above mixed liquid; (3) ultrasonicating for 0.05-0.5 hours; (4) ) ball milling and dispersing for 0.3-1 hour to obtain a finished product. The present invention uses a suitable dispersant to process the nano-cobalt powder, plus the joint action of ultrasound and ball milling, so that the nano-cobalt powder can be highly dispersed in the medium to form a uniform and stable slurry.

Description

technical field [0001] The invention relates to a nano material and a preparation method thereof, in particular to a nano cobalt powder slurry and a preparation method thereof. Background technique [0002] Nano cobalt powder is a widely used nano material. Cobalt powder is the best metal binder. In the process of producing cemented carbide products, the quality of cobalt powder becomes the decisive factor. Nano-cobalt powder can diffuse rapidly during the sintering process to form a stable and uniform distribution, making it possible to Produce parts with high density, high hardness, high tensile strength, high impact strength, fatigue resistance and high corrosion resistance; it has the advantages of high recording density, high coercive force, high signal-to-noise ratio and good oxidation resistance, etc. Improve the performance of magnetic tapes and large-capacity soft and hard disks; nano-cobalt powder has a special absorption effect on electromagnetic waves, and nano-...

Claims

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Application Information

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IPC IPC(8): B01F3/12B22F9/00
Inventor 刘艳翟金玲桂莹芳张波张蕾谷星雪方进轩
Owner BEIJING NACHEN TECH DEV
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