CN102351185A - Method for preparing superfine silicon carbide powder - Google Patents
Method for preparing superfine silicon carbide powder Download PDFInfo
- Publication number
- CN102351185A CN102351185A CN2011102700071A CN201110270007A CN102351185A CN 102351185 A CN102351185 A CN 102351185A CN 2011102700071 A CN2011102700071 A CN 2011102700071A CN 201110270007 A CN201110270007 A CN 201110270007A CN 102351185 A CN102351185 A CN 102351185A
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- silicon carbide
- superfine silicon
- carbide micro
- micro powder
- ultrapure water
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Abstract
The invention discloses a method for preparing superfine silicon carbide powder. The method comprises the following steps of: pulp mixing: mixing silicon micro powder with the granularity of less than 0.45 micrometer and ultrapure water in a weight ratio of 1:(7-8); stirring: uniformly stirring the mixed pulp by using a mixing and dispersing device; grading: obtaining the superfine silicon carbide powder with the granularity of 0.1-0.3 micrometer through mechanical grading; collection: collecting the superfine silicon carbide powder by using a collector; and washing with ultrapure water to remove impurities, dehydrating and drying until the water content is less than 0.07 percent to obtain the finished product. The method has the advantages of high production efficiency and high product precision and is suitable for large-scale industrial production.
Description
Technical field
The present invention relates to a kind of preparation method of inorganic materials, that be specifically related to is a kind of preparation method of superfine silicon carbide micro powder.
Background technology
Silicon powder is by natural quartz (SiO
2) or fused quartz (natural quartz is through high-temperature fusion, cooled non-crystalline state SiO
2) micro mist that forms through multiple tracks processes such as broken, ball milling (or vibration, airflow milling), flotation, pickling purification, high purity water processing.Silicon powder is a kind of nontoxic, tasteless, free of contamination ceramic.Because good performances such as it possesses that temperature tolerance is good, acid-alkali-corrosive-resisting, poor thermal conductivity, high insulation, low bulk, stable chemical performance, hardness are big are widely used in fields such as chemical industry, electronics, unicircuit (IC), electrical equipment, plastics, coating, senior paint, rubber, national defence.
Present stage division is divided into mechanical type classification and physical fractionation mostly.What the mechanical type classification was with the most use is exactly to come out to realize the classification of fractionated mechanical type through the interstitial row that changes between the singulizing disc; Wherein in the singulizing disc; One is shaft collar; Another is a rolling disc; Motion through between the physical structure realizes classification; Though this kind hierarchy plan can be realized classification, there is certain restriction, purification degree is poor; Another kind is to obtain by hydraulic classification, can utilize the suspension-s classification, and this kind scheme water consumption is big, waste water source, unsuitable large-scale industrial production.
Summary of the invention
The present invention provides a kind of preparation method of superfine silicon carbide micro powder according to above-mentioned deficiency.
For realizing above-mentioned purpose, technical scheme of the present invention is a kind of preparation method of superfine silicon carbide micro powder, and implementation step is:
1) mix slurry: with granularity less than 0.45 micron silicon powder by weight 1: 7-8 mixes with ultrapure water;
2) stir: will mix slurry and stir through the blending dispersion device;
3) classification: obtain the superfine silicon carbide micro powder that granularity is the 0.1-0.3 micron through the mechanical type classification;
4) collect: collect superfine silicon carbide micro powder through collector;
5) through ultrapure water flushing removal of impurities, dehydrate then, water ratio is lower than 0.07%, makes finished product.
Described mechanical type classification is meant through screening plant and roughly selects and thin choosing.
Described ultrapure water is through after soft water processing, ultraviolet-sterilization, pure water filtration, ion-exchange and the ultrafiltration of polishing resin, makes ultrapure water.
The beneficial effect of technique scheme is: production efficiency of the present invention is high, and the product precision is high, suitability for mass industrialized production.
Embodiment
Do bright specifically below in conjunction with embodiment to the present invention.
Embodiment one:
A kind of preparation method of superfine silicon carbide micro powder, implementation step is:
1) mix slurry: with granularity less than 0.45 micron silicon powder by weight 1: 7 with through after soft water processing, ultraviolet-sterilization, pure water filtration, ion-exchange and the ultrafiltration of polishing resin, make ultrapure water and mix;
2) stir: will mix slurry and stir through the blending dispersion device;
3) classification: through the mechanical type classification is that screening plant is roughly selected and thin choosing, roughly selects and obtains the silicon carbide micro-powder that granularity is the 0.3-0.5 micron, and it is 0.1 micron superfine silicon carbide micro powder that thin then choosing obtains granularity;
4) collect: collect superfine silicon carbide micro powder through collector;
5) through ultrapure water flushing removal of impurities, dehydrate then, water ratio is lower than 0.06%, makes finished product.
Embodiment two:
A kind of preparation method of superfine silicon carbide micro powder, implementation step is:
1) mix slurry: with granularity less than 0.45 micron silicon powder by weight 1: 7.5 with through after soft water processing, ultraviolet-sterilization, pure water filtration, ion-exchange and the ultrafiltration of polishing resin, make ultrapure water and mix;
2) stir: will mix slurry and stir through the blending dispersion device;
3) classification: through the mechanical type classification is that screening plant is roughly selected and thin choosing, roughly selects and obtains the silicon carbide micro-powder that granularity is the 0.4-0.5 micron, and it is 0.2 micron superfine silicon carbide micro powder that thin then choosing obtains granularity;
4) collect: collect superfine silicon carbide micro powder through collector;
5) through ultrapure water flushing removal of impurities, dehydrate then, water ratio is lower than 0.05%, makes finished product.
Embodiment three:
A kind of preparation method of superfine silicon carbide micro powder, implementation step is:
1) mix slurry: with granularity less than 0.45 micron silicon powder by weight 1: 8 with through after soft water processing, ultraviolet-sterilization, pure water filtration, ion-exchange and the ultrafiltration of polishing resin, make ultrapure water and mix;
2) stir: will mix slurry and stir through the blending dispersion device;
3) classification: through the mechanical type classification is that screening plant is roughly selected and thin choosing, roughly selects and obtains the silicon carbide micro-powder that granularity is the 0.3-0.5 micron, and it is 0.3 micron superfine silicon carbide micro powder that thin then choosing obtains granularity;
4) collect: collect superfine silicon carbide micro powder through collector;
5) through ultrapure water flushing removal of impurities, dehydrate then, water ratio is lower than 0.07%, makes finished product.
Claims (3)
1. the preparation method of a superfine silicon carbide micro powder is characterized in that implementation step is:
1) mix slurry: with granularity less than 0.45 micron silicon powder by weight 1: 7-8 mixes with ultrapure water;
2) stir: will mix slurry and stir through the blending dispersion device;
3) classification: obtain the superfine silicon carbide micro powder that granularity is the 0.1-0.3 micron through the mechanical type classification;
4) collect: collect superfine silicon carbide micro powder through collector;
5) through ultrapure water flushing removal of impurities, dehydrate then, water ratio is lower than 0.07%, makes finished product.
2. the preparation method of a kind of superfine silicon carbide micro powder according to claim 1 is characterized in that: described mechanical type classification is meant through screening plant and roughly selects and thin choosing.
3. the preparation method of a kind of superfine silicon carbide micro powder according to claim 1, it is characterized in that: described ultrapure water is through after soft water processing, ultraviolet-sterilization, pure water filtration, ion-exchange and the ultrafiltration of polishing resin, makes ultrapure water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102700071A CN102351185A (en) | 2011-09-08 | 2011-09-08 | Method for preparing superfine silicon carbide powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102700071A CN102351185A (en) | 2011-09-08 | 2011-09-08 | Method for preparing superfine silicon carbide powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102351185A true CN102351185A (en) | 2012-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102700071A Pending CN102351185A (en) | 2011-09-08 | 2011-09-08 | Method for preparing superfine silicon carbide powder |
Country Status (1)
| Country | Link |
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| CN (1) | CN102351185A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586123A (en) * | 2013-11-12 | 2014-02-19 | 成都青洋电子材料有限公司 | Carborundum sorting method and sorting system |
| CN104475239A (en) * | 2014-12-18 | 2015-04-01 | 江苏博迁新材料有限公司 | Grading device and grading method for ultra-fine powder |
-
2011
- 2011-09-08 CN CN2011102700071A patent/CN102351185A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586123A (en) * | 2013-11-12 | 2014-02-19 | 成都青洋电子材料有限公司 | Carborundum sorting method and sorting system |
| CN104475239A (en) * | 2014-12-18 | 2015-04-01 | 江苏博迁新材料有限公司 | Grading device and grading method for ultra-fine powder |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120215 |