CN108558406A - A kind of preparation process of silicon carbide ceramics grinding bead - Google Patents
A kind of preparation process of silicon carbide ceramics grinding bead Download PDFInfo
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- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/5248—Carbon, e.g. graphite
Abstract
The invention discloses a kind of preparation processes of silicon carbide ceramics grinding bead, specifically include following steps：（1）Ceramic raw material is uniformly mixed, ceramic raw material includes ultra-fine Sic powder and additive；（2）By step（1）In be uniformly mixed ceramic raw material using roll moulding process, the blank sphere of desired size is made；（3）By step（2）The blank sphere of gained, which is placed in sintering furnace, to be sintered, and sintering temperature is controlled at 2150 DEG C, is cooled to room temperature, is obtained silicon carbide ceramics grinding bead；The present invention should preparation is simple, the silicon carbide ceramics grinding bead prepared be used for ultra fine silicon carbide powder manufacturing, using homogeneity silicon carbide ceramics pearl grind carborundum powder, prevent to pollute, silicon carbide ultrafine powder quality made to be guaranteed.
Description
Technical field
The invention belongs to powder field of milling, and in particular to a kind of preparation process of silicon carbide ceramics grinding bead.
Background technology
Thyrite has high hardness, lower friction coefficient, and corrosion-resistant resistance to oxidation, and it is also known as Buddha's warrior attendants
Sand makees the ceramic of raw material production using SiC, is applied to various fields, such as sealing ring, bullet resistant material, but grind industry
Mainly use oxide ceramics, such as Al2O、ZrO2Deng；In ultra-fine Sic powder manufacturing, silicon carbide ultrafine powder at present（Less than 1
μ）, also use wet processing, dry method to be unable to reach requirement, abrasive media used when wet grinding, using Sic coarse sands namely Sic
The coarse granule sand generated in production process, advantage：It is at low cost, disadvantage：Sand grains is irregular, and intensity is low, and grinding efficiency is low, research and development one
Kind can overcome the abrasive media of drawbacks described above to become those skilled in the art's technical problem urgently to be resolved hurrily.
Invention content
The technical problem to be solved by the present invention is to for the above disadvantage of the existing technology, propose a kind of silicon carbide
The preparation process of ceramic grinding pearl, preparation is simple for this, and the silicon carbide ceramics grinding bead prepared is used for ultra-fine carbonization
Si powder manufacturing grinds carborundum powder using homogeneity silicon carbide ceramics pearl, prevents to pollute, silicon carbide ultrafine powder quality is made to obtain
To guarantee.
The technical solution that the present invention solves the above technical problem is：
A kind of preparation process of silicon carbide ceramics grinding bead, specifically includes following steps：
（1）Ceramic raw material is uniformly mixed, ceramic raw material includes ultra-fine Sic powder and additive；
（2）By step（1）In be uniformly mixed ceramic raw material using roll moulding process, the blank sphere of desired size is made；
（3）By step（2）The blank sphere of gained, which is placed in sintering furnace, to be sintered, and sintering temperature is controlled at 2150 DEG C, is cooled to room
Temperature obtains silicon carbide ceramics grinding bead.
The technical solution that the present invention further limits is：
In the preparation process of aforementioned silicon carbide ceramics grinding bead, step（3）Sintering furnace is graphite resistor furnace.
In the preparation process of aforementioned silicon carbide ceramics grinding bead, ultra-fine Sic powder and 5-10% that ceramic raw material is 90-95%
Additive, wherein additive includes following components according to the mass fraction：
Aluminium oxide：4-7 parts, adhesive phenolic resin：1-3 parts, pore creating material graphite：3-5 parts, chopped carbon fiber predispersion：1-3
Part.
Technique effect, the chopped carbon fiber that the present invention adds improve the mechanical property of silicon carbide, and it is whole to improve ceramic raw material
Fracture toughness, improve the intensity and consistency of biscuit, meet machining needs, it is real that the present invention passes through multigroup formula system
It tests and finds accurate raw material proportioning, higher intensity, hardness, acid-alkali-corrosive-resisting and good are prepared under the action of sintering aid
Mechanical property ceramics, have a good application prospect as abrasive media material.
In the preparation process of aforementioned silicon carbide ceramics grinding bead, step（1）It is middle to be uniformly mixed ceramic raw material specially：
Ultra-fine Sic powder in ceramic raw material, aluminium oxide and graphite are uniformly mixed and obtain mixture, is obtained mixture is post-treated
Powder；
Post-processing sieves with 100 mesh sieve for mixture is dried 1-3h at 70-75 DEG C, obtains powder.
In the preparation process of aforementioned silicon carbide ceramics grinding bead, moulding process is rolled specifically, using " planetary " rotation
Device, is added the powder of adhesive and preparation in the same turntable, rotary rolling at fine and close 0.1-1mm base pearl.
In the preparation process of aforementioned silicon carbide ceramics grinding bead, throwing is ground to obtained silicon carbide ceramics grinding bead
Light so that the sphericity of microballon is no more than 0.07 μm, and surface roughness is no more than 0.008 micron, and grinding and polishing is specially：
Corase grinding：Load pressure 3-7N/ pearls, in corase grinding grinding agent used, the granularity of diamond particles is 20-40 μm；
Primary fine grinding：Load pressure 0.7-1N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 5-8 μm；
Secondary fine grinding：Load pressure 1-3N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 3-5 μm；
Polishing is ground, load pressure 0.2-0.4N/ pearls, and in polishing barreling grinding agent used, the granularity of diamond particles is 0.01-0.06
μm。
Technique effect, grinding steps include the grinding agent in each stage, and corase grinding, fine grinding, polishing mill are combined, and smart twice
Mill, improves the precision and efficiency of grinding, and reduce the time of grinding.
In the preparation process of aforementioned silicon carbide ceramics grinding bead, corase grinding grinding agent, fine grinding grinding agent and polishing barreling grinding agent
For identical grinding agent, meter includes following components in mass ratio：
Diamond particles：20-30%, ammonium citrate：65-75%, cerium oxide：1-2%, sodium tripolyphosphate：0.1-0.3%, sodium metasilicate：
2.2-2.4%, neopelex：1-2%, the sum of the above components are 100%.
The beneficial effects of the invention are as follows：
The silicon carbide ceramics grinding bead that the present invention prepares is used for ultra fine silicon carbide powder manufacturing, is made pottery using homogeneity silicon carbide
Porcelain bead grinds carborundum powder, prevents to pollute, silicon carbide ultrafine powder quality is made to be guaranteed.
For the present invention using silicon carbide and aluminium oxide as starting material, graphite is pore creating material, passes through reaction in-situ combined process system
Standby raw material, graphite is thermosets, will not be liquefied when aoxidizing in air, and oxidizing temperature is high, and oxidizing temperature is high, heat
Analysis shows：600 DEG C of beginnings of oxidation of graphite, until 800 DEG C of completions, the oxidation of silicon-carbide particle is happened at 750 DEG C or more,
Therefore graphite will not be by complete burn off, before 800 DEG C before Oxidation of SiC, and green body can be by not having the graphite of complete burn off
Particle supports, and to make green body remain intact, after 800 DEG C, in sintering process, silicon carbide is oxidized to unformed
Silica can set up support frame, and green body can remain intact in whole process, and reaction in-situ overcomes silicon carbide hardly possible
It is real with the defect of sintering, mode balling-up.
Specific implementation mode
Embodiment 1
A kind of preparation process of silicon carbide ceramics grinding bead is provided in the present embodiment, specifically includes following steps：
A kind of preparation process of silicon carbide ceramics grinding bead, specifically includes following steps：
（1）Ceramic raw material is uniformly mixed, ceramic raw material includes ultra-fine Sic powder and additive；
（2）By step（1）In be uniformly mixed ceramic raw material using roll moulding process, the blank sphere of desired size is made；
（3）By step（2）The blank sphere of gained, which is placed in graphite resistor furnace, to be sintered, and sintering temperature is controlled at 2150 DEG C, cooling
To room temperature, silicon carbide ceramics grinding bead is obtained.
In the present embodiment, ceramic raw material is 90% ultra-fine Sic powder and 10% additive, wherein according to the mass fraction
Additive includes following components：
Aluminium oxide：4 parts, adhesive phenolic resin：1 part, pore creating material graphite：3 parts, chopped carbon fiber predispersion：1 part.
In the present embodiment, step（1）It is middle to be uniformly mixed ceramic raw material specially：
Ultra-fine Sic powder in ceramic raw material, aluminium oxide and graphite are uniformly mixed and obtain mixture, is obtained mixture is post-treated
Powder；
Post-processing sieves with 100 mesh sieve for mixture is dried 1h at 70 DEG C, obtains powder.
In the present embodiment, moulding process is rolled specifically, using " planetary " rotating device, add in the same turntable
Enter adhesive and the powder of preparation, rotary rolling at fine and close 0.1mm base pearl.
In the present embodiment, polishing is ground to obtained silicon carbide ceramics grinding bead so that the sphericity of microballon does not surpass
0.07 μm is crossed, surface roughness is no more than 0.008 micron, and grinding and polishing is specially：
Corase grinding：Load pressure 3N/ pearls, in corase grinding grinding agent used, the granularity of diamond particles is 20 μm；
Primary fine grinding：Load pressure 0.7N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 5 μm；
Secondary fine grinding：Load pressure 1N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 3 μm；
Polishing is ground, load pressure 0.2N/ pearls, and in polishing barreling grinding agent used, the granularity of diamond particles is 0.01 μm.
In the present embodiment, it is identical grinding agent to roughly grind grinding agent, fine grinding grinding agent and polishing barreling grinding agent, in mass ratio
Meter includes following components：
Diamond particles：30%, ammonium citrate：65%, cerium oxide：1%, sodium tripolyphosphate：0.1%, sodium metasilicate：2.4%, dodecane
Base benzene sulfonic acid sodium salt：1%, the sum of the above components are 100%.
Embodiment 2
A kind of preparation process of silicon carbide ceramics grinding bead is provided in the present embodiment, specifically includes following steps：
A kind of preparation process of silicon carbide ceramics grinding bead, specifically includes following steps：
（1）Ceramic raw material is uniformly mixed, ceramic raw material includes ultra-fine Sic powder and additive；
（2）By step（1）In be uniformly mixed ceramic raw material using roll moulding process, the blank sphere of desired size is made；
（3）By step（2）The blank sphere of gained, which is placed in graphite resistor furnace, to be sintered, and sintering temperature is controlled at 2150 DEG C, cooling
To room temperature, silicon carbide ceramics grinding bead is obtained.
In the present embodiment, ceramic raw material is 95% ultra-fine Sic powder and 5% additive, wherein is added according to the mass fraction
It includes following components to add agent：
Aluminium oxide：7 parts, adhesive phenolic resin：3 parts, pore creating material graphite：5 parts, chopped carbon fiber predispersion：3 parts.
In the present embodiment, step（1）It is middle to be uniformly mixed ceramic raw material specially：
Ultra-fine Sic powder in ceramic raw material, aluminium oxide and graphite are uniformly mixed and obtain mixture, is obtained mixture is post-treated
Powder；
Post-processing sieves with 100 mesh sieve for mixture is dried 3h at 75 DEG C, obtains powder.
In the present embodiment, moulding process is rolled specifically, using " planetary " rotating device, add in the same turntable
Enter adhesive and the powder of preparation, rotary rolling at fine and close 1mm base pearl.
In the present embodiment, polishing is ground to obtained silicon carbide ceramics grinding bead so that the sphericity of microballon does not surpass
0.07 μm is crossed, surface roughness is no more than 0.008 micron, and grinding and polishing is specially：
Corase grinding：Load pressure 7N/ pearls, in corase grinding grinding agent used, the granularity of diamond particles is 40 μm；
Primary fine grinding：Load pressure 1N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 8 μm；
Secondary fine grinding：Load pressure 3N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 5 μm；
Polishing is ground, load pressure 0.4N/ pearls, and in polishing barreling grinding agent used, the granularity of diamond particles is 0.06 μm.
In the present embodiment, it is identical grinding agent to roughly grind grinding agent, fine grinding grinding agent and polishing barreling grinding agent, in mass ratio
Meter includes following components：
Diamond particles：20%, ammonium citrate：75%, cerium oxide：2%, sodium tripolyphosphate：0.3%, sodium metasilicate：2.2%, dodecane
Base benzene sulfonic acid sodium salt：0.5%, the sum of the above components are 100%.
Embodiment 3
A kind of preparation process of silicon carbide ceramics grinding bead is provided in the present embodiment, specifically includes following steps：
A kind of preparation process of silicon carbide ceramics grinding bead, specifically includes following steps：
（1）Ceramic raw material is uniformly mixed, ceramic raw material includes ultra-fine Sic powder and additive；
（2）By step（1）In be uniformly mixed ceramic raw material using roll moulding process, the blank sphere of desired size is made；
（3）By step（2）The blank sphere of gained, which is placed in graphite resistor furnace, to be sintered, and sintering temperature is controlled at 2150 DEG C, cooling
To room temperature, silicon carbide ceramics grinding bead is obtained.
In the present embodiment, ceramic raw material is 992% ultra-fine Sic powder and 8% additive, wherein according to the mass fraction
Additive includes following components：
Aluminium oxide：5 parts, adhesive phenolic resin：2 parts, pore creating material graphite：4 parts, chopped carbon fiber predispersion：2 parts.
In the present embodiment, step（1）It is middle to be uniformly mixed ceramic raw material specially：
Ultra-fine Sic powder in ceramic raw material, aluminium oxide and graphite are uniformly mixed and obtain mixture, is obtained mixture is post-treated
Powder；
Post-processing sieves with 100 mesh sieve for mixture is dried 2h at 72 DEG C, obtains powder.
In the present embodiment, moulding process is rolled specifically, using " planetary " rotating device, add in the same turntable
Enter adhesive and the powder of preparation, rotary rolling at fine and close 0.5mm base pearl.
In the present embodiment, polishing is ground to obtained silicon carbide ceramics grinding bead so that the sphericity of microballon does not surpass
0.07 μm is crossed, surface roughness is no more than 0.008 micron, and grinding and polishing is specially：
Corase grinding：Load pressure 5N/ pearls, in corase grinding grinding agent used, the granularity of diamond particles is 30 μm；
Primary fine grinding：Load pressure 0.8N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 7 μm；
Secondary fine grinding：Load pressure 2N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 4 μm；
Polishing is ground, load pressure 0.3N/ pearls, and in polishing barreling grinding agent used, the granularity of diamond particles is 0.03 μm.
In the present embodiment, it is identical grinding agent to roughly grind grinding agent, fine grinding grinding agent and polishing barreling grinding agent, in mass ratio
Meter includes following components：
Diamond particles：24%, ammonium citrate：70%, cerium oxide：2%, sodium tripolyphosphate：0.3%, sodium metasilicate：2.2%, dodecane
Base benzene sulfonic acid sodium salt：1.5%, the sum of the above components are 100%.
It is used for ultra fine silicon carbide powder manufacturing using the silicon carbide ceramics grinding bead that the technique of the present invention is prepared, is adopted
Carborundum powder is ground with homogeneity silicon carbide ceramics pearl, prevents to pollute, silicon carbide ultrafine powder quality is made to be guaranteed.
The preparation method of the chopped carbon fiber predispersion used in the present embodiment is：Carbon fiber is chopped and is existed for length
1-3mm, it is low-temperature oxidation 1-2 hours lower at 500-600 °C, then it is 3 to be dipped in volume ratio：7 dust technology and acetone it is mixed
It closes in solution, rinses surface after impregnating 1-2 days repeatedly with deionized water until solution is in neutrality, using sol-gel after drying
Method forms zirconia coating in carbon fiber surface, then the carbon fiber is completely immersed in water, and ultrasonic wave disperses 10-20 minutes,
The OP-10 emulsifiers of 0.3-0.5 times of parts by weight of carbon fiber are added, continue ultrasonic disperse 1-2 hours.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (7)
1. a kind of preparation process of silicon carbide ceramics grinding bead, which is characterized in that specifically include following steps：
（1）Ceramic raw material is uniformly mixed, the ceramic raw material includes ultra-fine Sic powder and additive；
（2）By step（1）In be uniformly mixed ceramic raw material using roll moulding process, the blank sphere of desired size is made；
（3）By step（2）The blank sphere of gained, which is placed in sintering furnace, to be sintered, and sintering temperature is controlled at 2150 DEG C, is cooled to room
Temperature obtains silicon carbide ceramics grinding bead.
2. the preparation process of silicon carbide ceramics grinding bead according to claim 1, it is characterised in that：Step（3）Described
Sintering furnace is graphite resistor furnace.
3. the preparation process of silicon carbide ceramics grinding bead according to claim 1, it is characterised in that：The ceramic raw material
For the ultra-fine Sic powder of 90-95% and the additive of 5-10%, wherein the additive described according to the mass fraction includes following components：
Aluminium oxide：4-7 parts, adhesive phenolic resin：1-3 parts, pore creating material graphite：3-5 parts, chopped carbon fiber predispersion：1-3
Part.
4. the preparation process of silicon carbide ceramics grinding bead according to claim 1, it is characterised in that：Step（1）It is middle to make pottery
Porcelain raw material, which is uniformly mixed, is specially：
Ultra-fine Sic powder in ceramic raw material, aluminium oxide and graphite are uniformly mixed and obtain mixture, is obtained mixture is post-treated
Powder；
The post-processing is that mixture is dried to 1-3h at 70-75 DEG C, sieves with 100 mesh sieve, obtains powder.
5. the preparation process of silicon carbide ceramics grinding bead according to claim 4, it is characterised in that：The rolling molding
Adhesive and the powder of preparation, rotary rolling is added specifically, using " planetary " rotating device in technique in the same turntable
At the base pearl of fine and close 0.1-1mm.
6. the preparation process of silicon carbide ceramics grinding bead according to claim 1, it is characterised in that：To obtained silicon carbide
Ceramic grinding pearl is ground polishing so that and the sphericity of microballon is no more than 0.07 μm, and surface roughness is no more than 0.008 micron,
The grinding and polishing is specially：
Corase grinding：Load pressure 3-7N/ pearls, in corase grinding grinding agent used, the granularity of diamond particles is 20-40 μm；
Primary fine grinding：Load pressure 0.7-1N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 5-8 μm；
Secondary fine grinding：Load pressure 1-3N/ pearls, in fine grinding grinding agent used, the granularity of diamond particles is 3-5 μm；
Polishing is ground, load pressure 0.2-0.4N/ pearls, and in polishing barreling grinding agent used, the granularity of diamond particles is 0.01-0.06
μm。
7. the preparation process of silicon carbide ceramics grinding bead according to claim 6, it is characterised in that：The corase grinding grinding
Agent, fine grinding grinding agent and polishing barreling grinding agent are identical grinding agent, and meter includes following components in mass ratio：
Diamond particles：20-30%, ammonium citrate：65-75%, cerium oxide：1-2%, sodium tripolyphosphate：0.1-0.3%, sodium metasilicate：
2.2-2.4%, neopelex：1-2%, the sum of the above components are 100%.
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Cited By (5)
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| CN109467430A (en) * | 2018-12-26 | 2019-03-15 | 浙江杰奈尔新材料有限公司 | A kind of pearl formula and processing technology |
| CN109678518A (en) * | 2018-12-30 | 2019-04-26 | 郑州可塑金新材料有限公司 | It is used to prepare the high sphericity silicon carbide grinding bead of high intensity of high pure and ultra-fine powder |
| CN110549253A (en) * | 2019-09-16 | 2019-12-10 | 山东卓越精工集团有限公司 | automatic sand blasting device for aluminum profile |
| CN110564302A (en) * | 2019-09-12 | 2019-12-13 | 江苏吉星新材料有限公司 | Sapphire polishing solution based on silicon carbide abrasive |
| CN111116183A (en) * | 2019-12-31 | 2020-05-08 | 青海圣诺光电科技有限公司 | Preparation method of alumina ceramic grinding ball |
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