CN103922756B - Surface treatment process method for silicon carbide powder - Google Patents
Surface treatment process method for silicon carbide powder Download PDFInfo
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- CN103922756B CN103922756B CN201410172870.7A CN201410172870A CN103922756B CN 103922756 B CN103922756 B CN 103922756B CN 201410172870 A CN201410172870 A CN 201410172870A CN 103922756 B CN103922756 B CN 103922756B
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Abstract
The invention discloses a surface treatment process method for silicon carbide powder, and the surface treatment process method is implemented through adding silicon carbide powder and an acid solution into an impurity removal reaction kettle to remove impurities such as Fe2O3, wherein the volume ratio of the silicon carbide powder to the acid solution is 7:3; washing the silicon carbide powder obtained by separating by using a weak alkaline solution until the silicon carbide powder is neutral; after the obtained silicon carbide powder is cleaned by using deionized water, drying the obtained product; reacting the obtained product with a surface treatment agent consisting of organic silicon, organic fluorine, ethanol and water in a surface treatment reaction kettle, wherein the ratio of the obtained product to the surface treatment agent is 1:1; finally, after the silicon carbide powder is deposited and then separated, washing and drying the obtained product so as to obtain a product with the dispersity of 2*10<-5>, the wettability of 20% and an contact angle of 10 degrees. The process method disclosed by the invention is simple in process, low in cost and energy consumption, and good in product performance.
Description
Technical field
The present invention relates to metallurgical technology field, particularly a kind of carborundum powder surface treatment process method.
Background technology
Silicon carbide (sic) micro mist has a wide range of applications in ceramic microabrasive tools, ceramic matric composite, resin finish emery wheel and diamond wheel etc. as abrasive material or filler.Because its excellent properties is as high in hardness, intensity is high, anti-oxidant and wear resisting property is very outstanding etc., the application of silicon carbide micro-powder in the non-grinding purposes such as refractory materials, engineering ceramics, structured material also widely.At present, silicon carbide has become the main raw material(s) of development modern national defense, modern industry and high and new technology.
Because the silicon carbide micro-powder surface energy of fine granularity (10u m is with thin) is larger, easy reunion, shaping not only at ceramic matric composite, dispersed and mobility in sintering process, wettability does not all reach processing performance requirement, in the pouring forming technology of ceramic abrasive tool, dispersiveness and mobility do not reach building-up properties requirement, and it is also poor with the consistency of bonding agent in resin finish emery wheel is produced, therefore, easily cause the intensity of grinding tool low, too early sand fallout, the use properties such as quality of finish and durability does not reach requirement, have a strong impact on the quality of abrasive article.
Method complex manufacturing disclosed in CN 1636938 A, cost is high, energy consumption is high and the carborundum powder over-all properties of process is not high.How to prepare stably dispersing, carborundum powder that wettability is higher, be solve that ceramic matric composite is shaping, sintering process performance and ceramic abrasive tool building-up properties; Improve the dispersiveness of silicon carbide micro-powder and the consistency with resinoid bond, improve the key of the use properties of resin abrasive tools and the use properties of raising resin abrasive tools with the over-all properties improving ceramic matric composite.
summary of the invention,
The object of this invention is to provide the carborundum powder surface treatment process method that a kind of cost is low, performance is good.
Processing method step of the present invention is as follows:
1. the ratio of carborundum powder and acidic solution 6-7:4-3 is by volume added in removal of impurities reactor, stir 1-2h to abundant reaction removing Fe when envrionment temperature is 25 DEG C-40 DEG C
2o
3after impurity, carborundum powder deposition is separated;
2. be washed till neutrality by being separated the carborundum powder weakly alkaline solution obtained, then with dry after washed with de-ionized water, detect powder characteristic;
3. make tensio-active agent by organosilicon (silane coupling agent Z-6040) and organic fluorine (carboxylic acid fluoride BYK-P104S), ethanol, water as solvent, the ratio of organosilicon (silane coupling agent Z-6040), organic fluorine (carboxylic acid fluoride BYK-P104S), ethanol, water 4:1:4:1 is by volume added in surface treatment reaction still, again qualified silicon carbide powder and above-mentioned solvent are added in surface treatment reaction still by the volume ratio of 1:1, temperature 40-60 DEG C, fully stir 2-6h under rotating speed 300-1000r/min condition and react;
4. the carborundum powder deposition be obtained by reacting in surface treatment reaction still is separated rear washed with de-ionized water, dried by cleaned carborundum powder, detect silicon carbide powder performance, its dispersiveness is in 1-5 × 10
-5between, wettability between 10-30%, contact angle 0-25 °.
Wherein acidic solution is 5% hydrochloric acid soln.
Wherein weakly alkaline solution is 8%Al (OH)
3solution.
Carborundum powder good dispersity, wettability prepared by processing method of the present invention are high, in shaping, the sintering of ceramic matric composite and the casting of ceramic abrasive tool, all can reach processing requirement, and technique is simple, cost and energy consumption low.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Embodiment
embodimentas shown in Figure 1,
1. by the proportions of carborundum powder and 5% hydrochloric acid soln by volume per-cent 7:3, the above-mentioned carborundum powder for preparing and 5% hydrochloric acid soln are added in reactor, under envrionment temperature is 25 DEG C of-40 DEG C of conditions, stirs 1.5h to abundant reaction removing Fe
2o
3after impurity, carborundum powder deposition is separated;
2. the carborundum powder 8%Al (OH) obtained will be separated
3solution is washed till neutrality, then uses washed with de-ionized water, drying;
3. detect dried silicon carbide powder performance;
4. make tensio-active agent with silane coupling agent Z-6040 and carboxylic acid fluoride BYK-P104S, ethanol, water as solvent, the ratio of silane coupling agent Z-6040, carboxylic acid fluoride BYK-P104S, ethanol, water 4:1:4:1 is by volume added in surface treatment reaction still, again qualified silicon carbide powder and above-mentioned solvent are added in surface treatment reaction still by the volume ratio of 1:1, under temperature 50 C, rotating speed 500r/min condition, fully stir 3h react;
5. the carborundum powder deposition be obtained by reacting in surface treatment reaction still be separated, clean post-drying, detect silicon carbide powder performance, its dispersiveness is 2 × 10
-5, wettability is 20%, contact angle 10 °.
Claims (3)
1. a carborundum powder surface treatment method, is characterized in that step is as follows:
1) ratio of carborundum powder and acidic solution 6-7:4-3 is by volume added in removal of impurities reactor, stir 1-2h to abundant reaction removing Fe when envrionment temperature is 25 DEG C-40 DEG C
2o
3after impurity, carborundum powder deposition is separated;
2) neutrality is washed till by being separated the carborundum powder weakly alkaline solution obtained, then with dry after washed with de-ionized water;
3) tensio-active agent is made by organosilicon and organic fluorine, ethanol, water as solvent, the ratio of organosilicon, organic fluorine, ethanol, water 4:1:4:1 is by volume added in surface treatment reaction still, again qualified silicon carbide powder and above-mentioned solvent are added in surface treatment reaction still by the volume ratio of 1:1, temperature 40-60 DEG C, fully stir 2-6h under rotating speed 300-1000r/min condition and react;
4) the carborundum powder deposition be obtained by reacting in surface treatment reaction still is separated rear washed with de-ionized water, cleaned carborundum powder is dried to obtain product, and detect silicon carbide powder performance, its dispersiveness is in 1-5 × 10
-5between, wettability between 10-30%, contact angle 0-25 °;
Described organosilicon is silane coupling agent Z-6040;
Described organic fluorine is carboxylic acid fluoride BYK-P104S.
2. method according to claim 1, is characterized in that described acidic solution is 5% hydrochloric acid soln.
3. method according to claim 1, is characterized in that described weakly alkaline solution is 8%Al (OH)
3solution.
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| CN201410172870.7A CN103922756B (en) | 2014-04-28 | 2014-04-28 | Surface treatment process method for silicon carbide powder |
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| CN201410172870.7A CN103922756B (en) | 2014-04-28 | 2014-04-28 | Surface treatment process method for silicon carbide powder |
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| CN103922756B true CN103922756B (en) | 2015-04-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104723226B (en) * | 2015-03-07 | 2017-07-21 | 西安科技大学 | The preparation method of Foamex emery wheel |
| CN106702201B (en) * | 2015-07-30 | 2018-10-23 | 湖南恒裕新材料科技发展有限公司 | A kind of piston of automobile enhancing aluminum-base composite material by silicon carbide particles and processing technology |
| CN107055540A (en) * | 2017-05-05 | 2017-08-18 | 郑州西利康新材料有限公司 | A kind of special silicon carbide super micro powder preparation technology of golden steel wire |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636938A (en) * | 2004-11-26 | 2005-07-13 | 中国科学院长春应用化学研究所 | Silicon carbide surface modifying method |
| CN101804982A (en) * | 2010-04-15 | 2010-08-18 | 连云港东渡碳化硅有限公司 | Purification method of silicon carbide superfine micropowder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05170539A (en) * | 1991-12-19 | 1993-07-09 | Toshiba Ceramics Co Ltd | Sic-based slurry for cast-molding |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636938A (en) * | 2004-11-26 | 2005-07-13 | 中国科学院长春应用化学研究所 | Silicon carbide surface modifying method |
| CN101804982A (en) * | 2010-04-15 | 2010-08-18 | 连云港东渡碳化硅有限公司 | Purification method of silicon carbide superfine micropowder |
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Effective date of registration: 20170407 Address after: 416100 Luxi County, Xiangxi Tujia and Miao Autonomous Prefecture Wu River Industrial Park Patentee after: HUNAN GOLDHORSE ALUMINUM INDUSTRY CO., LTD. Address before: 416100 Luxi County, Xiangxi Tujia and Miao Autonomous Prefecture Wu River Industrial Park Patentee before: HUNAN GOLDHORSE ALUMINUM INDUSTRY CO., LTD. Patentee before: HUNAN HENGYU NEW MATERIAL TECHNOLOGY DEVELOPMENT CO., LTD. |
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Effective date of registration: 20180315 Address after: 416100 Luxi County, Xiangxi Tujia and Miao Autonomous Prefecture Wu River Industrial Park Co-patentee after: HUNAN HENGYU NEW MATERIAL TECHNOLOGY DEVELOPMENT CO., LTD. Patentee after: HUNAN GOLDHORSE ALUMINUM INDUSTRY CO., LTD. Address before: 416100 Luxi County, Xiangxi Tujia and Miao Autonomous Prefecture Wu River Industrial Park Patentee before: HUNAN GOLDHORSE ALUMINUM INDUSTRY CO., LTD. |
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