CN101823714A - Preparation method of boron carbide powder with high specific surface area - Google Patents
Preparation method of boron carbide powder with high specific surface area Download PDFInfo
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- CN101823714A CN101823714A CN 201010178880 CN201010178880A CN101823714A CN 101823714 A CN101823714 A CN 101823714A CN 201010178880 CN201010178880 CN 201010178880 CN 201010178880 A CN201010178880 A CN 201010178880A CN 101823714 A CN101823714 A CN 101823714A
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- boron carbide
- carbide powder
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Abstract
The invention relates to a preparation method of boron carbide powder with a high specific surface area, comprising the following steps of firstly, putting boron carbide powder to be ground, solvent, dispersant and grinding medium based on the mass ratio of 20-40:100:0.5-1:20-160 in a ball mill and grinding for 3-5h; secondly, adding the dispersant of 10-20 percent of the total mass of the boron carbide powder, the solvent and the dispersant into the ball mill, taking out feed liquid after fully stirring, and carrying out treatments of settlement and dehydration; and thirdly, obtaining finished boron carbide powder after drying under the temperature of 100 DEG C, wherein the solvent is arbitrary one kind of water, methanol or ethanol, and the dispersant is the ethanol. The invention can lower the manufacture cost of boron carbide micropowder, can also shorten the production period and enhance the production efficiency and is suitable for batch production.
Description
Technical field
The present invention relates to the preparation method of a kind of high-specific surface area, submicron boron carbide powder.
Background technology
Norbide has good performances such as hardness height, light weight, wear-resistant, corrosion-resistant, high temperature resistant, intercept neutrons, is widely used in fields such as machinery, metallurgy, chemical industry, nuclear industry.Norbide is a kind of covalent linkage compound, has better chemical stability, makes that its sintering in the ceramic process of preparation is very difficult.Usually the technology that adopts all is 2200 ℃ of left and right sides pressing methods both at home and abroad, and its manufacturing cost height can not be applied to the processing of special-shaped and specialty products, has limited its development.
The preparation of norbide ultrafine powder is a boron carbide ceramics agglomerating key.At present both at home and abroad all carried out a large amount of work aspect preparing,, enlarged its Application Areas, adapted to the demand of every profession and trade development norbide in the hope of the sintering character of improving norbide, the purpose that reduces manufacturing cost at submicron and nano boron carbide.
Summary of the invention
Technical problem to be solved by this invention is: in order to solve the problem of existing boron carbide ceramics sintering difficulty, manufacturing cost height, simple shape, provide a kind of preparation method who is applicable to the boron carbide powder with high specific surface area of low-cost sintering boron carbide pottery.
Technical solution of the present invention is: the preparation method of boron carbide powder with high specific surface area comprises the steps:
(1), will boron carbide powder be ground, solvent, dispersion agent and grinding medium be that the ratio of 20～40:100:0.5～1:20～160 places grinding in ball grinder 3～5h in mass ratio;
(2), the dispersion agent that adds above-mentioned boron carbide powder, solvent and dispersion agent three quality summation 10～20% in ball mill, fully stir the back and take out feed liquid, carry out sedimentation and processed;
(3), be lower than under 100 ℃ of temperature after the drying, boron carbide powder gets product;
Described solvent is any one in water, methyl alcohol or the ethanol, and described dispersion agent is an ethanol.
Technique effect of the present invention is: it can reduce manufacture cost of boron carbide micropowder, can shorten the production cycle simultaneously, enhance productivity, and is fit to produce in batches.
Embodiment
It comprises the steps:
(1), will boron carbide powder be ground, solvent, dispersion agent and grinding medium be that the ratio of 20～40:100:0.5～1:20～160 places agitated ball mill to grind 3～5h in mass ratio;
(2), the dispersion agent that adds above-mentioned boron carbide powder, solvent and dispersion agent three quality summation 10～20% in ball mill, fully stir the back and take out feed liquid, carry out sedimentation and processed;
(3), under being lower than 100 ℃ of temperature, send in the loft drier after the drying, boron carbide powder gets product.
Described solvent is any one in water, methyl alcohol or the ethanol, and described dispersion agent is an ethanol.
It is described that to wait to grind the boron carbide powder granularity be 20～60 μ m.
Described drum's speed of rotation is controlled at 100～300r/min.
Churning time is 0.5～1h in the described step (2).
Be 4～8h time of drying in the described step (3).
Described finished product carbonized granularity is that 0.2～0.5 μ m, specific surface area are greater than 20mm
2/ g.
Embodiment 1:
With granularity is that 20～60 μ m boron carbide powder 50kg add in the agitated ball mill of 150kg solvent, add the dispersion agent of 0.5kg and begin ball milling with the ceramic grinding ball of 100kg, the rotating speed of preceding 3 hours ball mills is 300r/min, the rotating speed of the 2 hours ball mills in back is 100r/min, total ball milling time 5h, the dispersion agent that adds 5kg in the feed liquid behind ball milling stirred after 0.5 hour extracts feed liquid out, places another settling bowl to carry out sedimentation, and sedimentation added in the drier after 4 hours carries out processed.Material cake after the dehydration is sent in the loft drier, below 100 ℃, dry 4 hours, can obtain granularity in 0.2～0.5 μ m, specific surface area greater than 20mm
2The boron carbide powder of/g.
The present invention is the method that adopts vertical stirring ball-milling, and the improvement by grinding medium, dispersion agent obtains 0.2～0.5 micron of granularity, specific surface area greater than 20mm
2The boron carbide powder of/g.Methyl alcohol adopts industrial methanol among the present invention, and ethanol adopts dehydrated alcohol.
Claims (6)
1. the preparation method of boron carbide powder with high specific surface area is characterized in that, it comprises the steps:
(1), will boron carbide powder be ground, solvent, dispersion agent and grinding medium be that the ratio of 20～40:100:0.5～1:20～160 places grinding in ball grinder 3～5h in mass ratio;
(2), the dispersion agent that adds above-mentioned boron carbide powder, solvent and dispersion agent three quality summation 10～20% in ball mill, fully stir the back and take out feed liquid, carry out sedimentation and processed;
(3), be lower than under 100 ℃ of temperature after the drying, boron carbide powder gets product;
Described solvent is any one in water, methyl alcohol or the ethanol, and described dispersion agent is an ethanol.
2. the preparation method of boron carbide powder with high specific surface area as claimed in claim 1 is characterized in that, described to wait to grind the boron carbide powder granularity be 20～60 μ m.
3. the preparation method of boron carbide powder with high specific surface area as claimed in claim 1 is characterized in that, described drum's speed of rotation is controlled at 100～300r/min.
4. the preparation method of boron carbide powder with high specific surface area as claimed in claim 1 is characterized in that, churning time is 0.5～1h in the described step (2).
5. the preparation method of boron carbide powder with high specific surface area as claimed in claim 1 is characterized in that, be 4～8h time of drying in the described step (3).
6. the preparation method of boron carbide powder with high specific surface area as claimed in claim 1 is characterized in that, described finished product carbonized granularity is that 0.2～0.5 μ m, specific surface area are greater than 20mm
2/ g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010178880 CN101823714A (en) | 2010-05-21 | 2010-05-21 | Preparation method of boron carbide powder with high specific surface area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010178880 CN101823714A (en) | 2010-05-21 | 2010-05-21 | Preparation method of boron carbide powder with high specific surface area |
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| CN101823714A true CN101823714A (en) | 2010-09-08 |
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| CN 201010178880 Pending CN101823714A (en) | 2010-05-21 | 2010-05-21 | Preparation method of boron carbide powder with high specific surface area |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432014A (en) * | 2011-10-17 | 2012-05-02 | 宁波伏尔肯机械密封件制造有限公司 | Preparation method of submicron carbonized boron powder |
| CN103113109A (en) * | 2013-04-03 | 2013-05-22 | 常熟华融太阳能新型材料科技有限公司 | Preparation method of boron carbide ceramic |
| CN104230349A (en) * | 2013-06-13 | 2014-12-24 | 张家港能瓷材料科技有限公司 | Preparation method of ultrafine nano-powder with narrow size distribution |
| CN105502404A (en) * | 2016-01-22 | 2016-04-20 | 东北大学 | Method for smelting preparation of high-quality boron carbide crystals |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1460640A (en) * | 2003-05-19 | 2003-12-10 | 大连巨鑫超硬材料有限公司 | Preparation method of boron carbide ultramicropowder |
-
2010
- 2010-05-21 CN CN 201010178880 patent/CN101823714A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1460640A (en) * | 2003-05-19 | 2003-12-10 | 大连巨鑫超硬材料有限公司 | Preparation method of boron carbide ultramicropowder |
Non-Patent Citations (1)
| Title |
|---|
| 《稀有金属与硬质合金》 19940331 周荣兴等 高能搅拌球磨制备碳化硼超细粉的研究 第19页第1栏第13－26行，表1 1－6 , 第116期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432014A (en) * | 2011-10-17 | 2012-05-02 | 宁波伏尔肯机械密封件制造有限公司 | Preparation method of submicron carbonized boron powder |
| CN103113109A (en) * | 2013-04-03 | 2013-05-22 | 常熟华融太阳能新型材料科技有限公司 | Preparation method of boron carbide ceramic |
| CN104230349A (en) * | 2013-06-13 | 2014-12-24 | 张家港能瓷材料科技有限公司 | Preparation method of ultrafine nano-powder with narrow size distribution |
| CN105502404A (en) * | 2016-01-22 | 2016-04-20 | 东北大学 | Method for smelting preparation of high-quality boron carbide crystals |
| CN105502404B (en) * | 2016-01-22 | 2018-05-22 | 东北大学 | A kind of smelting preparation method of high-quality boron carbide ingot |
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Open date: 20100908 |