CN102091787A - Method for preparing nano cobalt powder - Google Patents
Method for preparing nano cobalt powder Download PDFInfo
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- CN102091787A CN102091787A CN2009102633436A CN200910263343A CN102091787A CN 102091787 A CN102091787 A CN 102091787A CN 2009102633436 A CN2009102633436 A CN 2009102633436A CN 200910263343 A CN200910263343 A CN 200910263343A CN 102091787 A CN102091787 A CN 102091787A
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Abstract
The invention relates to a method for preparing nano cobalt powder, and belongs to the technical field of nano metal materials. In the method, hydrazine hydrate is used as a reducing agent to reduce cobalt chloride into nano cobalt. The method is easy to operate; the produced nano cobalt powder is spherical; and the nano cobalt powder can be quickly and continuously produced on a large scale.
Description
Technical field
The present invention relates to a kind of preparation method of nano-cobalt powder, belong to the nano metal material technical field.
Background technology
Nano-cobalt powder has big specific area, surface atom number, surface energy, surface tension sharply increase with the decline of particle diameter, cause electricity, magnetic, sensitivity characteristic and the surface stability etc. of nano-cobalt powder to be different from common cobalt powder, make it important use be arranged, present excellent performance at industrial circles such as electronics industry, magnetic material, carbide alloy, surface spraying, chemical catalysis.As traditional carbide alloy binding agent, cobalt powder is a best material.Cemented carbide industry has the call to metal cobalt powder.
Domestic nano-cobalt powder preparation method who takes and technology all are more complicated and high energy consumption at present, and cost is than higher, and the cobalt powder granularity that obtains is thicker relatively, can not intactly embody the excellent properties of nano-cobalt powder.
Summary of the invention
The objective of the invention is to defective, a kind of easy and simple to handle, preparation method of nano-cobalt powder cheaply is provided at above-mentioned prior art.
Technical scheme of the present invention is as follows:
The preparation method of a kind of nano-cobalt powder provided by the invention, concrete steps are as follows:
A) take by weighing a certain amount of cobalt salt compound, it is dissolved in the distilled water, make the concentration of cobalt ions reach 0.04～0.2mol/L; Add ammoniacal liquor then, the mass ratio of ammoniacal liquor, cobalt salt is 1: 1～10.
B) solution that step a) is obtained is heated to 40～80 ℃, and nitrogen protection adds the 10ml reductant solution, and the control temperature is reacted 30min about reaction temperature
C) solution that step b) is obtained cools off naturally, and with the ethanol washing, centrifugal in low speed centrifuge, centrifugal speed is 2400r/min
D) nano-cobalt powder after will cleaning gets final product in 40～70 ℃ of vacuum drying.
Described cobalt salt is a cobalt chloride.
Described reducing agent is a hydrazine hydrate, and the concentration of the reducing agent aqueous solution is 0.5～2mol/L.
The foundation of the preparation of the inventive method is a redox reaction.Wherein hydrazine hydrate is as reducing agent, with Co
2+Be reduced to Co.
The present invention has following characteristics: simple to operate; The nano-cobalt powder of producing is spherical in shape; Provide a kind of continuous large-scale apace to produce the technology of nano-cobalt powder.
The specific embodiment
The present invention below is described in conjunction with the embodiments, but does not limit the present invention.
Embodiment one:
The preparation method of the nano-cobalt powder that present embodiment provides, concrete steps are as follows
A) take by weighing cobalt chloride 37.52g, it is dissolved in the 1000ml distilled water; Add 28% ammoniacal liquor 50ml then.
B) solution that step a) is obtained is heated to 60 ℃, adds the 10ml hydrazine hydrate solution, and the concentration of hydrazine hydrate solution is 2mol/L, and the control temperature is reacted 30min about 60 ℃ of reaction temperatures
C) solution that step b) is obtained cools off naturally, and with the ethanol washing, centrifugal in low speed centrifuge, centrifugal speed is 2400r/min
D) nano-cobalt powder after will cleaning gets final product in 50 ℃ of vacuum drying.
Prepared nano-cobalt powder good dispersion, the nothing of present embodiment reunited, and average grain diameter is the even spherical nanoparticles of 55nm.
Claims (3)
1. the preparation method of a nano-cobalt powder is characterized in that, described method comprises following concrete steps:
A) take by weighing a certain amount of cobalt salt compound, it is dissolved in the distilled water, make the concentration of cobalt ions reach 0.04～0.2mol/L; Add ammoniacal liquor then, the mass ratio of ammoniacal liquor, cobalt salt is 1: 1～10.
B) solution that step a) is obtained is heated to 40～80 ℃, and nitrogen protection adds the 10ml reductant solution, and the control temperature is reacted 30min about reaction temperature
C) solution that step b) is obtained cools off naturally, and with the ethanol washing, centrifugal in low speed centrifuge, centrifugal speed is 2400r/min
D) nano-cobalt powder after will cleaning gets final product in 40～70 ℃ of vacuum drying.
2. the preparation method of a kind of nano-cobalt powder according to claim 1 is characterized in that its described cobalt salt is a cobalt chloride.
3. the preparation method of a kind of nano-cobalt powder according to claim 1 is characterized in that its described reducing agent is a hydrazine hydrate, and the concentration of the reducing agent aqueous solution is 0.5～2mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102633436A CN102091787A (en) | 2009-12-11 | 2009-12-11 | Method for preparing nano cobalt powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102633436A CN102091787A (en) | 2009-12-11 | 2009-12-11 | Method for preparing nano cobalt powder |
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| Publication Number | Publication Date |
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| CN102091787A true CN102091787A (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102633436A Pending CN102091787A (en) | 2009-12-11 | 2009-12-11 | Method for preparing nano cobalt powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886526A (en) * | 2011-07-19 | 2013-01-23 | 深圳市格林美高新技术股份有限公司 | Reduction method for preparing superfine cobalt powder by hydrazine hydrate |
| CN102921960A (en) * | 2012-11-19 | 2013-02-13 | 扬州大学 | Preparation method of magnetic cobalt nanometer material |
| CN103433501A (en) * | 2013-08-08 | 2013-12-11 | 淮阴师范学院 | Preparation method of uniform-grain-size spherical nano cobalt |
| CN105268986A (en) * | 2014-07-25 | 2016-01-27 | 荆门市格林美新材料有限公司 | Method for continuously producing large-Fisher-particle-size cobalt powder |
-
2009
- 2009-12-11 CN CN2009102633436A patent/CN102091787A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886526A (en) * | 2011-07-19 | 2013-01-23 | 深圳市格林美高新技术股份有限公司 | Reduction method for preparing superfine cobalt powder by hydrazine hydrate |
| CN102886526B (en) * | 2011-07-19 | 2015-04-29 | 深圳市格林美高新技术股份有限公司 | Reduction method for preparing superfine cobalt powder by hydrazine hydrate |
| CN102921960A (en) * | 2012-11-19 | 2013-02-13 | 扬州大学 | Preparation method of magnetic cobalt nanometer material |
| CN103433501A (en) * | 2013-08-08 | 2013-12-11 | 淮阴师范学院 | Preparation method of uniform-grain-size spherical nano cobalt |
| CN105268986A (en) * | 2014-07-25 | 2016-01-27 | 荆门市格林美新材料有限公司 | Method for continuously producing large-Fisher-particle-size cobalt powder |
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Application publication date: 20110615 |