CN108275980A - A kind of forming method of complicated shape aluminium oxide ceramics part - Google Patents
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- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
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Abstract
The invention discloses a kind of forming methods of complicated shape aluminium oxide ceramics part, include the following steps：（100）Alumina powder, dispersant, solvent, binder and mill are situated between and are added in ball grinder, the ball milling on planetary ball mill or horizontal tumbling mill；Then gelling agent is added and continues ball milling, the gelling agent is starch and agarose；（200）Slurry after ball milling is subjected to froth in vacuum, is then injected into the stainless steel mould of required shape, stainless steel mould is sealed to be placed in isoperibol is cured；（300）Green body demoulding after solidification is placed in the environment of constant temperature and humidity and is dried, the green compact of complicated shape aluminium oxide ceramics part are obtained, is sintered molding again later.By the above-mentioned means, present invention process process is simple and environmentally-friendly, the high performance accurate aluminium oxide ceramics part of acquisition that can be at lower cost.
Description
Technical field
The present invention relates to the preparation fields of ceramic material, more particularly to a kind of molding of complicated shape aluminium oxide ceramics part
Method.
Background technology
Ceramic material generally enbrittles, and high, hardness is big, difficult the features such as processing, therefore is processed into complex-shaped component difficulty
It is larger；In addition, ceramic body is shunk during sintering product into, it is difficult to obtain the ceramic component of precision size, improve
Processing cost, these deficiencies limit its application in many fields to a certain extent.Therefore, realize that ceramic material is close
Net molding is critically important to the preparation and development of advanced ceramics.
Aluminium oxide ceramics is a kind of current most widely used oxide ceramics, it has, and intensity is high, hardness is big, wearability
With corrosion resistance is good, insulating properties is excellent and good chemical stability, thus high performance structure ceramic is commonly used for, especially suitable for height
Performance high technology ceramics part field.Therefore, to prepare the aluminium oxide ceramics of excellent combination property and expand aluminium oxide ceramics
Application field realizes that the near-net-shape of aluminium oxide ceramics is necessary.
Injection forming, hot die-casting molding are the complicated shape ceramic wet forming techniques of current mainstream, are limited by its principle,
The ceramic porosity of preparation is higher, internal flaw is relatively more, consistency is relatively low, and Mechanical Properties of Products and stability are opposite
It is poor.Gel casting forming is as a kind of novel ceramic molding by the extensive concern of ceramic industry.Its basic work
Skill is first to prepare the high solid volume fraction of the low viscosity containing solvent, ceramic powder, organic monomer, crosslinking agent and dispersant
Slurry makes organic monomer cross-linked polymeric in slurry at tridimensional network then under the action of catalyst and initiator, from
And ceramic slurry in-situ solidifying is made to be molded.This technical process and equipment are simple, and the gel solidification time is fast, and shaping efficiency is high, to mould
It is wide to have adaptability for materials, green strength is high, it is small to shrink, and green compact and microstructure of ceramics are uniform, have excellent performance, easy near net-shape system
The ceramic component for making various complicated shapes is a kind of moulding process that highly practical, application prospect is very wide.Note congeals at present
Most common gelling agent is acrylamide, N ' N- dimethacrylamide and N- hydroxymethylacrylate amides etc. in type, is applicable in pottery
Ceramic powder is wide, green compact function admirable obtained, but these gel rubber systems have certain toxicity, and Long Term Contact is unfavorable to body,
This severely limits popularization and application of the note solidification forming in Ceramic production.Therefore, the exploitation of non-toxic gel system is for note
The development of solidification forming is of great significance.
Invention content
The present invention solves the technical problem of：In view of the deficiencies of the prior art, a kind of complicated shape aluminium oxide is provided
The forming method of ceramic member, technical process is simple and environmentally-friendly, the high performance accurate aluminium oxide ceramics part of acquisition that can be at lower cost.
In order to solve the above technical problems, one aspect of the present invention is：A kind of complicated shape aluminium oxide is provided
The forming method of ceramic member, includes the following steps：
（100）Alumina powder, dispersant, solvent, binder and mill are situated between and are added in ball grinder, mill Jie grinds for zirconium oxide
Abrading-ball, the ball grinder are polytetrafluoroethylene (PTFE) ball grinder or nylon ball grinder, and ratio of grinding media to material is 2 ~ 6, in planetary ball mill or is crouched
Ball milling 4 ~ 8 hours on formula tumbling mill, rotating speed are 180r/min ~ 350r/min；Then gelling agent is added and continues 10 ~ 40 points of ball milling
Clock, rotating speed are 100r/min ~ 180r/min, and the gelling agent is starch and agarose；
（200）Slurry after ball milling is subjected to froth in vacuum, is then injected into the stainless steel mould of required shape, by stainless steel mold
Tool, which is sealed to be placed in isoperibol, to be cured, and solidification temperature is 55 DEG C ~ 90 DEG C；
（300）Green body demoulding after solidification is placed in the environment of constant temperature and humidity and is dried 6 ~ 36 hours, complex shape is obtained
The green compact of shape aluminium oxide ceramics part, are sintered molding again later.
In a preferred embodiment of the present invention, the alumina powder is technical grade, purity >=95%, the grain of powder
Diameter≤10 μm.
In a preferred embodiment of the present invention, the dispersant is sulphonic acid copolymer, polyvinylpyrrolidone and gathers
Ammonium acrylate, addition are the 0.2% ~ 1.2% of alumina powder weight.
In a preferred embodiment of the present invention, the solvent is deionized water.
In a preferred embodiment of the present invention, the binder is polyethylene glycol, and addition is alumina powder constitution
The 0.1% ~ 1.0% of amount.
In a preferred embodiment of the present invention, the addition of the gelling agent be alumina powder weight 0.3% ~
3.5%。
In a preferred embodiment of the present invention, the step（100）The solid content of the alumina slurry obtained after ball milling
It is 60% ~ 75%.
In a preferred embodiment of the present invention, the step（200）The condition of middle vacuum defoamation be -0.1 ~ -
The time of 0.05MPa, vacuum defoamation are 5 ~ 20 minutes.
In a preferred embodiment of the present invention, the step（300）Specially：Green body demoulding after solidification is placed on
It is dried 6 ~ 36 hours in the environment of constant temperature and humidity, it is then 4 ~ 15 hours dry under ventilation condition again, drying temperature is 50 ~
100 DEG C, the green compact of complicated shape aluminium oxide ceramics part are obtained, are sintered molding again later.
In a preferred embodiment of the present invention, the step（300）Dried strip of the middle green body under constant-temperature constant-humidity environment
Part is humidity 50% ~ 100%, 20 DEG C ~ 40 DEG C of temperature.
The beneficial effects of the invention are as follows：By reasonably optimizing moulding process, using nontoxic starch and agarose as multiple
Gelling agent system is closed, the oxidation of complicated shape is obtained by techniques such as the ball milling of alumina slurry, slurry deaeration, injection molding and solidifications
Aluminium ceramic green, technical process is simple and environmentally-friendly, the high performance accurate aluminium oxide ceramics part of acquisition that can be at lower cost.
Specific implementation mode
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
Embodiment one：
A kind of forming method of complicated shape aluminium oxide ceramics part, includes the following steps：
（100）Alumina powder, dispersant, solvent, binder and mill are situated between and are added in ball grinder, mill Jie grinds for zirconium oxide
Abrading-ball, the ball grinder are polytetrafluoroethylene (PTFE) ball grinder or nylon ball grinder, ratio of grinding media to material 2, in planetary ball mill or horizontal
Ball milling 8 hours on tumbling mill, rotating speed 180r/min；Then gelling agent is added and continues ball milling 40 minutes, rotating speed 100r/min；
The solid content of the alumina slurry obtained after ball milling is 75%；
（200）Slurry after ball milling is subjected to froth in vacuum, the condition of vacuum defoamation is -0.1 ~ -0.05MPa, preferably -
The time of 0.07MPa, vacuum defoamation are 20 minutes；Be then injected into the stainless steel mould of required shape, by stainless steel mould into
Row sealing, which is placed in isoperibol, to be cured, and solidification temperature is 55 DEG C；
（300）Green body demoulding after solidification is placed in the environment of constant temperature and humidity and is dried 36 hours, drying condition is humidity
100%, 40 DEG C of temperature；The green compact of complicated shape aluminium oxide ceramics part are obtained, are sintered molding again later.
The alumina powder is technical grade, purity >=95%, grain size≤10 μm of powder.
The dispersant is sulphonic acid copolymer, polyvinylpyrrolidone and ammonium polyacrylate, and addition is aluminium oxide
The 0.2% of powder quality.
The solvent is deionized water.
The binder is polyethylene glycol, and addition is the 0.1% of alumina powder weight.
The gelling agent is starch and agarose, nontoxic, environmentally protective, cheap and derive from a wealth of sources；Its addition is oxidation
The 0.3% of aluminium powder weight.
Embodiment two
A kind of forming method of complicated shape aluminium oxide ceramics part, includes the following steps：
（100）Alumina powder, dispersant, solvent, binder and mill are situated between and are added in ball grinder, mill Jie grinds for zirconium oxide
Abrading-ball, the ball grinder are polytetrafluoroethylene (PTFE) ball grinder or nylon ball grinder, ratio of grinding media to material 6, in planetary ball mill or horizontal
Ball milling 4 hours on tumbling mill, rotating speed 350r/min；Then gelling agent is added and continues ball milling 10 minutes, rotating speed 180r/min；
The solid content of the alumina slurry obtained after ball milling is 70%；
（200）Slurry after ball milling is subjected to froth in vacuum, the condition of vacuum defoamation is -0.1 ~ -0.05MPa, preferably -
The time of 0.07MPa, vacuum defoamation are 5 minutes；It is then injected into the stainless steel mould of required shape, stainless steel mould is carried out
Sealing, which is placed in isoperibol, to be cured, and solidification temperature is 90 DEG C；
（300）Green body demoulding after solidification is placed in the environment of constant temperature and humidity and is dried 6 hours, drying condition is humidity 50%,
20 DEG C of temperature；Then 15 hours dry under ventilation condition again, drying temperature is 50 DEG C, obtains complicated shape aluminium oxide ceramics part
Green compact, be sintered molding again later.
The alumina powder is technical grade, purity >=95%, grain size≤10 μm of powder.
The dispersant is sulphonic acid copolymer, polyvinylpyrrolidone and ammonium polyacrylate, and addition is aluminium oxide
The 1.2% of powder quality.
The solvent is deionized water.
The binder is polyethylene glycol, and addition is the 1.0% of alumina powder weight.
The gelling agent is starch and agarose, nontoxic, environmentally protective, cheap and derive from a wealth of sources；Its addition is oxidation
The 3.5% of aluminium powder weight.
Embodiment three
A kind of forming method of complicated shape aluminium oxide ceramics part, includes the following steps：
（100）Alumina powder, dispersant, solvent, binder and mill are situated between and are added in ball grinder, mill Jie grinds for zirconium oxide
Abrading-ball, the ball grinder are polytetrafluoroethylene (PTFE) ball grinder or nylon ball grinder, and ratio of grinding media to material is 2 ~ 6, in planetary ball mill or is crouched
Ball milling 6 hours on formula tumbling mill, rotating speed 265r/min；Then gelling agent is added and continues ball milling 25 minutes, rotating speed 140r/
min；The solid content of the alumina slurry obtained after ball milling is 65%；
（200）Slurry after ball milling is subjected to froth in vacuum, the condition of vacuum defoamation is -0.1 ~ -0.05MPa, preferably -
The time of 0.07MPa, vacuum defoamation are 12 minutes；Be then injected into the stainless steel mould of required shape, by stainless steel mould into
Row sealing, which is placed in isoperibol, to be cured, and solidification temperature is 72 DEG C；
（300）Green body demoulding after solidification is placed in the environment of constant temperature and humidity and is dried 21 hours, drying condition is wet
Degree 75%, 30 DEG C of temperature；Then 10 hours dry under ventilation condition again, drying temperature is 75 DEG C, obtains complicated shape aluminium oxide
The green compact of ceramic member are sintered molding again later.
The alumina powder is technical grade, purity >=95%, grain size≤10 μm of powder.
The dispersant is sulphonic acid copolymer, polyvinylpyrrolidone and ammonium polyacrylate, and addition is aluminium oxide
The 0.7% of powder quality.
The solvent is deionized water.
The binder is polyethylene glycol, and addition is the 0.55% of alumina powder weight.
The gelling agent is starch and agarose, nontoxic, environmentally protective, cheap and derive from a wealth of sources；Its addition is oxidation
The 1.9% of aluminium powder weight.
The present invention gives the forming methods suitable for industrialized production oxidase complex aluminium ceramic member of complete set.It is adopted
Gelling agent is environmentally protective, cheap and derive from a wealth of sources.Slurry is not necessarily to that the complicated ingredients such as crosslinking agent, initiator, catalyst are added,
Suitably heating is just curable after only needing sealing, and technical process is simple and environmentally-friendly.The present invention makes pottery suitable for various complicated shape aluminium oxide
The molding of porcelain piece can obtain high performance accurate aluminium oxide ceramics part at lower cost.Therefore, the method for the present invention is suitble to scale
Industrial production promote.
Present invention is disclosed a kind of forming method of complicated shape aluminium oxide ceramics part, by reasonably optimizing moulding process,
Using nontoxic starch and agarose as plural gel agent system, by the ball milling of alumina slurry, slurry deaeration, injection molding and
The techniques such as solidification obtain the aluminium oxide ceramics green compact of complicated shape, and technical process is simple and environmentally-friendly, and acquisition that can be at lower cost is high
The accurate aluminium oxide ceramics part of performance.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (10)
1. a kind of forming method of complicated shape aluminium oxide ceramics part, which is characterized in that include the following steps：
（100）Alumina powder, dispersant, solvent, binder and mill are situated between and are added in ball grinder, mill Jie grinds for zirconium oxide
Abrading-ball, the ball grinder are polytetrafluoroethylene (PTFE) ball grinder or nylon ball grinder, and ratio of grinding media to material is 2 ~ 6, in planetary ball mill or is crouched
Ball milling 4 ~ 8 hours on formula tumbling mill, rotating speed are 180r/min ~ 350r/min；Then gelling agent is added and continues 10 ~ 40 points of ball milling
Clock, rotating speed are 100r/min ~ 180r/min, and the gelling agent is starch and agarose；
（200）Slurry after ball milling is subjected to froth in vacuum, is then injected into the stainless steel mould of required shape, by stainless steel mold
Tool, which is sealed to be placed in isoperibol, to be cured, and solidification temperature is 55 DEG C ~ 90 DEG C；
（300）Green body demoulding after solidification is placed in the environment of constant temperature and humidity and is dried 6 ~ 36 hours, complex shape is obtained
The green compact of shape aluminium oxide ceramics part, are sintered molding again later.
2. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the aluminium oxide
Powder is technical grade, purity >=95%, grain size≤10 μm of powder.
3. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the dispersant
For sulphonic acid copolymer, polyvinylpyrrolidone and ammonium polyacrylate, addition be alumina powder weight 0.2% ~
1.2%。
4. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the solvent is
Deionized water.
5. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the binder
For polyethylene glycol, addition is the 0.1% ~ 1.0% of alumina powder weight.
6. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the gelling agent
Addition be alumina powder weight 0.3% ~ 3.5%.
7. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the step
（100）The solid content of the alumina slurry obtained after ball milling is 60% ~ 75%.
8. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the step
（200）The condition of middle vacuum defoamation is -0.1 ~ -0.05MPa, and the time of vacuum defoamation is 5 ~ 20 minutes.
9. the forming method of complicated shape aluminium oxide ceramics part according to claim 1, which is characterized in that the step
（300）Specially：Green body demoulding after solidification is placed in the environment of constant temperature and humidity and is dried 6 ~ 36 hours, is then existed again
4 ~ 15 hours dry under ventilation condition, drying temperature is 50 ~ 100 DEG C, obtains the green compact of complicated shape aluminium oxide ceramics part, later
It is sintered molding again.
10. according to the forming method of any complicated shape aluminium oxide ceramics part of claim 1 or 9, which is characterized in that institute
State step（300）Drying condition of the middle green body under constant-temperature constant-humidity environment is humidity 50% ~ 100%, 20 DEG C ~ 40 DEG C of temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115677328A (en) * | 2022-10-27 | 2023-02-03 | 常熟理工学院 | Preparation method of alumina structure ceramic material with more than 95 percent |
| CN116444269A (en) * | 2023-03-30 | 2023-07-18 | 先导薄膜材料(安徽)有限公司 | Preparation method of doped molybdenum target |
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| EP1132359B1 (en) * | 2000-03-07 | 2003-06-04 | "VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK", afgekort "V.I.T.O." | Sol-gel modified gel casting of ceramic powders |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115677328A (en) * | 2022-10-27 | 2023-02-03 | 常熟理工学院 | Preparation method of alumina structure ceramic material with more than 95 percent |
| CN115677328B (en) * | 2022-10-27 | 2023-04-25 | 常熟理工学院 | Preparation method of ceramic material with alumina structure of more than 95 percent |
| CN116444269A (en) * | 2023-03-30 | 2023-07-18 | 先导薄膜材料(安徽)有限公司 | Preparation method of doped molybdenum target |
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Application publication date: 20180713 |