CN104437154A - Dispersing method for SiC nanopowder - Google Patents
Dispersing method for SiC nanopowder Download PDFInfo
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- CN104437154A CN104437154A CN201410631871.3A CN201410631871A CN104437154A CN 104437154 A CN104437154 A CN 104437154A CN 201410631871 A CN201410631871 A CN 201410631871A CN 104437154 A CN104437154 A CN 104437154A
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Abstract
The invention discloses a dispersing method for SiC nanopowder and aims at solving the problem that the existing SiC nanopowder is easily agglomerated in water. The dispersing method comprises the steps of firstly, titrating deionized water by using alkaline to obtain a solvent with the pH value of 12; and secondly, weighing SiC powder and a dispersing agent, sequentially adding the SiC powder and the dispersing agent into the solvent, and carrying out ultrasonic treatment for 14-16 minutes to obtain uniformly-dispersed slurry, namely finishing the dispersion of the SiC nanopowder. By using the dispersing method disclosed by the invention, the dispersing effect is good, the SiC nanopowder can be uniformly dispersed, and the slurry cannot be remarkably settled within 24 hours. The agglomeration size of the SiC nanopowder is relatively small, the agglomeration size of the SiC powder is smaller than 100nm, and the Zeta potential is about 40mv. The dispersing method is applied to the field of nanomaterials.
Description
Technical field
The present invention relates to a kind of process for dispersing of nano SiC powder.
Background technology
Nano material, because its crystallite dimension is in nanometer scale, makes its some performance have the peculiar advantage being different from traditional material, as high mechanical property, high rigidity, superplasticity and the property in acousto-optic-electric is pyromagnetic.SiC, due to its high high temperature resistant, anti-oxidant, anti-yaw damper performance, is considered to hypersonic flight, one of optimal candidate material of the extreme chemical environment that Reentry is relevant with rocket propulsion and thermal environment.Noted by gel and prepare ceramic material, have can prepare complex structural member, base substrate is convenient to mach advantage.Gel injection-moulding prepares nano SiC becomes a kind of new preparation method.When utilizing gel injection-moulding to prepare nano SiC material, because the surface area ratio of nano-powder is comparatively large, be easy in a solvent reunite.
Summary of the invention
The present invention is the problem that will solve the easily reunion in water of existing nano SiC powder, provides a kind of method of dispersing nanometer SiC powder.
The method of dispersing nanometer SiC powder of the present invention, carry out according to the following steps:
One, obtain by alkalimetric titration deionized water the solvent that pH is 12;
Two, take SiC powder and dispersant, successively join in solvent by SiC powder and dispersant, ultrasonic 14 ~ 16min, obtains finely dispersed slurry, namely completes the dispersion of nano SiC powder.
. the present invention has the following advantages:
1, the solvent that the present invention uses is deionized water, and inexpensive clean is pollution-free.
2, the dispersion effect of the inventive method good, be uniformly dispersed, obvious sediment can be there is not by 24h in slurry.
3, the agglomerate size of nano SiC powder is less, and the agglomerate size of SiC powder is less than 100nm, and Zeta potential is about 40mv.
When SiC powder after the inventive method dispersion prepares nanometer ZrB2-SiC material for gel injection-moulding, not easily reunite.
Accompanying drawing explanation
Fig. 1 is the average grain diameter of the slurry being dispersed with SiC and the Zeta potential change curve with dispersant.
Detailed description of the invention
Technical solution of the present invention is not limited to following cited detailed description of the invention, also comprises any combination between each detailed description of the invention.
Detailed description of the invention one: the method for present embodiment dispersing nanometer SiC powder, carry out according to the following steps:
One, obtain by alkalimetric titration deionized water the solvent that pH is 12;
Two, take SiC powder and dispersant, successively join in solvent by SiC powder and dispersant, ultrasonic 14 ~ 16min, obtains finely dispersed slurry, namely completes the dispersion of nano SiC powder.
Detailed description of the invention two: present embodiment and detailed description of the invention one unlike: in step one, alkali is ammoniacal liquor.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two unlike: in step 2, the particle diameter of SiC powder is 50nm, and purity is greater than 99%.Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three unlike: in step 2, dispersant is polyacrylic acid ammonia (PAA-NH4).Other is identical with one of detailed description of the invention one to three.
Detailed description of the invention five: one of present embodiment and detailed description of the invention one to four unlike: in step 2, the quality of SiC powder is 2% of solvent quality, and the quality of dispersant is 2% ~ 6% of SiC powder quality.Other is identical with one of detailed description of the invention one to four.
Embodiment 1:
The method of the present embodiment dispersing nanometer SiC powder, carry out according to the following steps:
One, obtain by ammonia water titration deionized water the solvent that pH is 12;
Two, take 0.2g SiC powder and 0.004g polyacrylic acid ammonia, successively join in 10mL solvent by SiC powder and polyacrylic acid ammonia, ultrasonic 15min, obtains finely dispersed slurry, namely completes the dispersion of nano SiC powder.
Use the pH value of pH tester test solvent in step one, precision is 0.1.
In step 2, the particle diameter of SiC powder is 50nm, and purity is greater than 99%.
In step 2, dispersant polyacrylic acid ammonia is for analyzing pure grade.
Ultrasonic power described in step 2 is 100w, and frequency is 180khz.
Embodiment 2:
The method of the present embodiment dispersing nanometer SiC powder, carry out according to the following steps:
One, obtain by ammonia water titration deionized water the solvent that pH is 12;
Two, take 0.2g SiC powder and 0.008g polyacrylic acid ammonia, successively join in 10mL solvent by SiC powder and polyacrylic acid ammonia, ultrasonic 15min, obtains finely dispersed slurry, namely completes the dispersion of nano SiC powder.
Use the pH value of pH tester test solvent in step one, precision is 0.1.
In step 2, the particle diameter of SiC powder is 50nm, and purity is greater than 99%.
In step 2, dispersant polyacrylic acid ammonia is for analyzing pure grade.
Ultrasonic power described in step 2 is 100w, and frequency is 180khz.
Embodiment 3:
The method of the present embodiment dispersing nanometer SiC powder, carry out according to the following steps:
One, obtain by ammonia water titration deionized water the solvent that pH is 12;
Two, take 0.2g SiC powder and 0.012g polyacrylic acid ammonia, successively join in 10mL solvent by SiC powder and polyacrylic acid ammonia, ultrasonic 15min, obtains finely dispersed slurry, namely completes the dispersion of nano SiC powder.
Use the pH value of pH tester test solvent in step one, precision is 0.1.
In step 2, the particle diameter of SiC powder is 50nm, and purity is greater than 99%.
In step 2, dispersant polyacrylic acid ammonia is for analyzing pure grade.
Ultrasonic power described in step 2 is 100w, and frequency is 180khz.
The slurry being dispersed with SiC obtained embodiment 1-3 carries out the test of grain diameter measurement and Zeta potential, shown in its result table 1 and Fig. 1.Fig. 1 is the average grain diameter of the slurry being dispersed with SiC and the Zeta potential change curve with dispersant, and in Fig. 1, a represents Zeta potential, and b represents average grain diameter.
Table 1
The Zeta potential absolute value > 35mv of slurry, illustrates that intergranular space resistance can make slurry form stable suspension.The agglomerate size of particle is reduced significantly in the slurry, agglomerate size < 100nm, illustrates that the reunion degree of nano particle is very low, can form stable suspension in 24h.
Claims (5)
1. a method for dispersing nanometer SiC powder, is characterized in that the method is carried out according to the following steps:
One, obtain by alkalimetric titration deionized water the solvent that pH is 12;
Two, take SiC powder and dispersant, successively join in solvent by SiC powder and dispersant, ultrasonic 14 ~ 16min, obtains finely dispersed slurry, namely completes the dispersion of nano SiC powder.
2. the method for a kind of dispersing nanometer SiC powder according to claim 1, is characterized in that in step one, alkali is ammoniacal liquor.
3. the method for a kind of dispersing nanometer SiC powder according to claim 1 and 2, it is characterized in that the particle diameter of SiC powder in step 2 is 50nm, purity is greater than 99%.
4. the method for a kind of dispersing nanometer SiC powder according to claim 3, is characterized in that in step 2, dispersant is polyacrylic acid ammonia.
5. the method for a kind of dispersing nanometer SiC powder according to claim 4, it is characterized in that the quality of SiC powder in step 2 is 2% of solvent quality, the quality of dispersant is 2% ~ 6% of SiC powder quality.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410631871.3A CN104437154A (en) | 2014-11-11 | 2014-11-11 | Dispersing method for SiC nanopowder |
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| CN201410631871.3A CN104437154A (en) | 2014-11-11 | 2014-11-11 | Dispersing method for SiC nanopowder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695983A (en) * | 2016-01-29 | 2016-06-22 | 江苏大学 | Nano silicon carbide glue-containing slurry for laser melt injection and preparation method thereof |
| CN108892509A (en) * | 2018-08-03 | 2018-11-27 | 宁波哈泰雷碳化物有限公司 | A kind of preparation method of the nanometer silicon carbide slurry for ceramic moulding by casting |
| CN114632434A (en) * | 2022-03-21 | 2022-06-17 | 哈尔滨工业大学 | Nano SiO2Process for preparing powder-sugar solution |
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| JPH07167771A (en) * | 1993-12-15 | 1995-07-04 | Tokai Konetsu Kogyo Co Ltd | Dispersing method for ceramic powder |
| CN100999413A (en) * | 2007-01-05 | 2007-07-18 | 北京博斯泰科技发展有限公司 | Nanometer ceramic powder sizing agent composition and its preparation method |
| CN103623937A (en) * | 2013-11-28 | 2014-03-12 | 安徽苏源光伏科技有限公司 | Agent for separating silicon and silicon carbide in mortar and preparation method thereof |
| CN103803981A (en) * | 2013-12-31 | 2014-05-21 | 平顶山易成新材料股份有限公司 | Method for preparing submicron silicon carbide powder |
| CN103833034A (en) * | 2014-02-12 | 2014-06-04 | 浙江天乐新材料科技有限公司 | Method for preparation of silicon carbide slurry with nano-carbontube and graphene as carbon sources |
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2014
- 2014-11-11 CN CN201410631871.3A patent/CN104437154A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07167771A (en) * | 1993-12-15 | 1995-07-04 | Tokai Konetsu Kogyo Co Ltd | Dispersing method for ceramic powder |
| CN100999413A (en) * | 2007-01-05 | 2007-07-18 | 北京博斯泰科技发展有限公司 | Nanometer ceramic powder sizing agent composition and its preparation method |
| CN103623937A (en) * | 2013-11-28 | 2014-03-12 | 安徽苏源光伏科技有限公司 | Agent for separating silicon and silicon carbide in mortar and preparation method thereof |
| CN103803981A (en) * | 2013-12-31 | 2014-05-21 | 平顶山易成新材料股份有限公司 | Method for preparing submicron silicon carbide powder |
| CN103833034A (en) * | 2014-02-12 | 2014-06-04 | 浙江天乐新材料科技有限公司 | Method for preparation of silicon carbide slurry with nano-carbontube and graphene as carbon sources |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695983A (en) * | 2016-01-29 | 2016-06-22 | 江苏大学 | Nano silicon carbide glue-containing slurry for laser melt injection and preparation method thereof |
| CN105695983B (en) * | 2016-01-29 | 2018-02-13 | 江苏大学 | Laser melts note nanometer silicon carbide material containing rubber cement and preparation method thereof |
| CN108892509A (en) * | 2018-08-03 | 2018-11-27 | 宁波哈泰雷碳化物有限公司 | A kind of preparation method of the nanometer silicon carbide slurry for ceramic moulding by casting |
| CN114632434A (en) * | 2022-03-21 | 2022-06-17 | 哈尔滨工业大学 | Nano SiO2Process for preparing powder-sugar solution |
| CN114632434B (en) * | 2022-03-21 | 2023-01-24 | 哈尔滨工业大学 | Nano SiO 2 Method for preparing powder-sugar solution |
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Application publication date: 20150325 |