CN103449819A - Gel casting molding process for mass production of silicon nitride ceramics - Google Patents
Gel casting molding process for mass production of silicon nitride ceramics Download PDFInfo
- Publication number
- CN103449819A CN103449819A CN2012101747427A CN201210174742A CN103449819A CN 103449819 A CN103449819 A CN 103449819A CN 2012101747427 A CN2012101747427 A CN 2012101747427A CN 201210174742 A CN201210174742 A CN 201210174742A CN 103449819 A CN103449819 A CN 103449819A
- Authority
- CN
- China
- Prior art keywords
- silicon nitride
- nitride ceramics
- initiator
- organic monomer
- consumption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Ceramic Products (AREA)
Abstract
Provided is a gel casting molding process for mass production of silicon nitride ceramics. The process comprises a solvent, an organic monomer, a crosslinking agent, dispersing agents, a silicon nitride powder, aqua ammonia, a catalyst and an initiator. The gel casting molding process is convenient to operate, can reduce the surface roughness of the silicon nitride ceramics, and can solve inhomogeneous gradient distribution of the molding density and easy deformation.
Description
Technical field:
The present invention relates to a kind of gel injection molding and forming technology of producing silicon nitride ceramics in batches.
Background technology:
Silicon nitride ceramics is the special ceramic material that a kind of α of take or β are principal crystalline phase, and it has a series of good character, as high strength, high-tenacity, high heat conduction, Properties of High Temperature Creep is good, wear resistance good and good self-lubricating ability.On for the manufacture of high temperature blade, high-temperature valve, high temperature nozzle, bearing, cutting tool, original advantage is arranged.
Traditional method for preparing silicon nitride ceramics comprises: first carry out dry-pressing, injection moulding or hydrostatic profile, degreasing again, finally at 1600 ℃-1900 ℃, carry out pressureless sintering or pressure sintering, sintering atmosphere is generally nitrogen atmosphere, to avoid silicon nitride decomposition gasification in this sintering range.
Because the hardness of silicon nitride ceramics is large, the machining difficulty, be difficult to use in and prepare complex parts, the component that adopt above-mentioned traditional method to prepare are more because of burr, the polishing difficulty causes surfaceness high, and the Gradient distribution of compact density is inhomogeneous yielding in addition, and blank strength is low, be easy to damage, be difficult to be extended on precise part and use.
For meeting the requirement of complex parts surfaceness, usually ceramic surface to be processed, treatment process comprises mechanical polishing, and still above-mentioned processing complicated operation, and this processing can cause the increase of production cost, and the defect ware rate also can raise.
Summary of the invention:
The object of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of easy to operate, can reduce the inhomogeneous yielding preparation method of Gradient distribution of silicon nitride ceramics surfaceness and solution compact density.
For achieving the above object, the present invention has adopted following technical scheme:
1, a kind of gel injection molding and forming technology of producing silicon nitride ceramics in batches, is characterized in that this technique comprises: solvent, organic monomer, linking agent, dispersion agent, beta-silicon nitride powder, ammoniacal liquor, catalyzer, initiator.
Described solvent is deionized water, described organic monomer is n-methylolacrylamide, consumption is 2.5%-10%, described linking agent is methylene-bisacrylamide, described dispersion agent is polyacrylamide and polyoxyethylene glycol, and consumption is respectively 0.5%-1.5% and 1%-1.5%, and described catalyzer is Tetramethyl Ethylene Diamine, described initiator is ammonium persulphate, and consumption is 0.1%-0.3%.
This technique comprises the following steps:
(a) take by a certain percentage described organic monomer, linking agent, dispersion agent and deionized water, mix, magnetic agitation is even, regulates the pH value, makes premixed liquid;
(b) beta-silicon nitride powder and premixed liquid are joined in ball grinder, add 120V voltage, the ball milling certain hour;
(c) stir also vacuum exhaust and make slurry;
(d) initiator that takes a morsel is dissolved in a small amount of catalyst solution be diluted, and splashes into 1-2 and drips ammoniacal liquor, regulates pH to alkalescence;
(e) dropwise add in the slurry whipping process, be stirred to and mix;
(f) slurry is injected to mould, pulp gel formation base substrate under the effect of initiator, delivery;
(g) the wet base after delivery is got rid of moisture by suitable drying means;
(h) sintering is made silicon nitride ceramics.
The present invention has following advantage with respect to prior art:
1, density significantly increases, and surfaceness reduces.
2, in base substrate, the Gradient distribution of compact density is evenly not yielding, and blank strength is high, not fragile.
Embodiment:
The present invention is now described in more detail by the following example.Following examples only are provided as the explanation purposes, and are not intended to limit the present invention.
Formula of the present invention comprises: solvent, organic monomer, linking agent, dispersion agent, beta-silicon nitride powder, ammoniacal liquor, catalyzer, initiator.
Described solvent is deionized water, described organic monomer is n-methylolacrylamide, consumption is 2.5 %-10%, described linking agent is methylene-bisacrylamide, described dispersion agent is polyacrylamide and polyoxyethylene glycol, and consumption is respectively 0.5%-1.5% and 1%-1.5%, and described catalyzer is Tetramethyl Ethylene Diamine, described initiator is ammonium persulphate, and consumption is 0.1%-0.3%.
This technique comprises the following steps:
(a) take by a certain percentage described organic monomer, linking agent, dispersion agent and deionized water, mix, magnetic agitation is even, regulates the pH value, makes premixed liquid;
(b) beta-silicon nitride powder and premixed liquid are joined in ball grinder, add 120V voltage, the ball milling certain hour;
(c) stir also vacuum exhaust and make slurry;
(d) initiator that takes a morsel is dissolved in a small amount of catalyst solution be diluted, and splashes into 1-2 and drips ammoniacal liquor, regulates pH to alkalescence;
(e) dropwise add in the slurry whipping process, be stirred to and mix;
(f) slurry is injected to mould, pulp gel formation base substrate under the effect of initiator, delivery;
(g) the wet base after delivery is got rid of moisture by suitable drying means;
(h) sintering is made silicon nitride ceramics.
Claims (3)
1. a gel injection molding and forming technology of producing silicon nitride ceramics in batches is characterized in that this technique comprises:
A) solvent,
B) organic monomer,
C) linking agent,
D) dispersion agent,
E) beta-silicon nitride powder,
F) ammoniacal liquor,
G) catalyzer,
H) initiator.
2. a kind of gel injection molding and forming technology of producing silicon nitride ceramics in batches according to claim 1, it is characterized in that: described solvent is deionized water, described organic monomer is n-methylolacrylamide, consumption is 2.5%-10%, and described linking agent is methylene-bisacrylamide, and described dispersion agent is polyacrylamide and polyoxyethylene glycol, consumption is respectively 0.5%-1.5% and 1%-1.5%, described catalyzer is Tetramethyl Ethylene Diamine, and described initiator is ammonium persulphate, and consumption is 0.1%-0.3%.
3. a kind of gel injection molding and forming technology of producing silicon nitride ceramics in batches according to claim 2 is characterized in that this technique comprises the following steps:
(a) take by a certain percentage described organic monomer, linking agent, dispersion agent and deionized water, mix, magnetic agitation is even, regulates the pH value, makes premixed liquid;
(b) beta-silicon nitride powder and premixed liquid are joined in ball grinder, add 120V voltage, the ball milling certain hour;
(c) stir also vacuum exhaust and make slurry;
(d) initiator that takes a morsel is dissolved in a small amount of catalyst solution be diluted, and splashes into 1-2 and drips ammoniacal liquor, regulates pH to alkalescence;
(e) dropwise add in the slurry whipping process, be stirred to and mix;
(f) slurry is injected to mould, pulp gel formation base substrate under the effect of initiator, delivery;
(g) the wet base after delivery is got rid of moisture by suitable drying means;
(h) sintering is made silicon nitride ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101747427A CN103449819A (en) | 2012-05-31 | 2012-05-31 | Gel casting molding process for mass production of silicon nitride ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101747427A CN103449819A (en) | 2012-05-31 | 2012-05-31 | Gel casting molding process for mass production of silicon nitride ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103449819A true CN103449819A (en) | 2013-12-18 |
Family
ID=49732716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101747427A Pending CN103449819A (en) | 2012-05-31 | 2012-05-31 | Gel casting molding process for mass production of silicon nitride ceramics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103449819A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171977A (en) * | 2019-05-09 | 2019-08-27 | 中国兵器工业第五二研究所烟台分所有限责任公司 | A kind of large scale AlON ceramic low-temp preparation method |
| CN111548168A (en) * | 2020-05-13 | 2020-08-18 | 金华市德裕精密陶瓷科技有限公司 | Ceramic material formula of precision part and preparation method thereof |
| CN114044682A (en) * | 2021-11-29 | 2022-02-15 | 上海材料研究所 | Method for preparing high-thermal-conductivity silicon nitride ceramic by water-based slurry gel injection molding |
| CN116496092A (en) * | 2023-04-10 | 2023-07-28 | 北京科技大学 | Micron-sized silicon nitride ceramic microsphere and preparation method and application thereof |
| CN117303911A (en) * | 2023-09-26 | 2023-12-29 | 安徽华晟新材料有限公司 | Crucible and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397210A (en) * | 2007-09-24 | 2009-04-01 | 深圳市金科特种材料股份有限公司 | Gel-casting moulding technique for preparing silicon nitride ceramics heating element |
| CN101665360A (en) * | 2009-10-19 | 2010-03-10 | 中国海洋大学 | Microwave curing process for ceramic material gel casting |
-
2012
- 2012-05-31 CN CN2012101747427A patent/CN103449819A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397210A (en) * | 2007-09-24 | 2009-04-01 | 深圳市金科特种材料股份有限公司 | Gel-casting moulding technique for preparing silicon nitride ceramics heating element |
| CN101665360A (en) * | 2009-10-19 | 2010-03-10 | 中国海洋大学 | Microwave curing process for ceramic material gel casting |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171977A (en) * | 2019-05-09 | 2019-08-27 | 中国兵器工业第五二研究所烟台分所有限责任公司 | A kind of large scale AlON ceramic low-temp preparation method |
| CN111548168A (en) * | 2020-05-13 | 2020-08-18 | 金华市德裕精密陶瓷科技有限公司 | Ceramic material formula of precision part and preparation method thereof |
| CN114044682A (en) * | 2021-11-29 | 2022-02-15 | 上海材料研究所 | Method for preparing high-thermal-conductivity silicon nitride ceramic by water-based slurry gel injection molding |
| CN116496092A (en) * | 2023-04-10 | 2023-07-28 | 北京科技大学 | Micron-sized silicon nitride ceramic microsphere and preparation method and application thereof |
| CN116496092B (en) * | 2023-04-10 | 2024-04-19 | 北京科技大学 | Micron-sized silicon nitride ceramic microsphere and preparation method and application thereof |
| CN117303911A (en) * | 2023-09-26 | 2023-12-29 | 安徽华晟新材料有限公司 | Crucible and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103449819A (en) | Gel casting molding process for mass production of silicon nitride ceramics | |
| CN101665360B (en) | Microwave curing process for ceramic material gel casting | |
| CN103360039B (en) | Large-size sheet-type electric-insulation heat-dissipation ceramic substrate and preparation method thereof | |
| CN103113102B (en) | Zirconia ceramic insert core and preparation method thereof | |
| CN102875150A (en) | Method for preparing silicon carbide ceramic impeller through gel casting and pressureless sintering | |
| CN104909765A (en) | Method for rapidly preparing high-performance Si3N4 ceramic ball at low cost | |
| CN103553632B (en) | A kind of preparation method of dense silicon nitride ceramic material | |
| CN113135762A (en) | Large-size silicon nitride ceramic ball and preparation method thereof | |
| CN105732007B (en) | A kind of calcium oxide-based ceramic-mould fast preparation method for complex parts manufacture | |
| CN113105252A (en) | Sintering aid for preparing silicon nitride ceramic, application of sintering aid and preparation method of silicon nitride ceramic | |
| CN106380201B (en) | A method of preparing special-shaped boron carbide ceramics | |
| CN107963890B (en) | Preparation method of titanium nitride porous conductive ceramic | |
| CN101429018B (en) | Freezing molding method for neodymium doped yttrium aluminum garnet transparent laser ceramic | |
| CN106747349B (en) | The method of in-situ preparation SiC enhancing alumina based ceramic core | |
| CN105777130B (en) | The gel casting forming preparation method of reaction-sintered boron carbide ceramics composite material | |
| CN102491779A (en) | Method for improving poriness of alumina ceramic mold core | |
| CN101269956A (en) | Method of preparing yttrium aluminum garnet transparent ceramic doping neodymium | |
| CN109384464B (en) | Nano ceramic container and preparation method thereof | |
| CN106278284A (en) | A kind of method utilizing ring-shaped graphite mould step sintering to prepare boron nitride ceramic material | |
| CN114773069B (en) | Preparation method of high-heat conductivity silicon nitride ceramic substrate for high-power integrated circuit | |
| CN110922193A (en) | Preparation method of silicon nitride ceramic ball | |
| CN109896860A (en) | A kind of silicon carbide injection forming production technology | |
| CN105523752A (en) | Production technology and production assembly line for permanent magnetic ferrite ring with large diameter | |
| CN107857597A (en) | A kind of preparation method of advanced structural ceramic | |
| CN105601283A (en) | Making method for Si3N4 ceramic of conductive network structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |