CN106747352A - A kind of sintering anti-deformation method of ultrathin transparent ceramics curtain coating biscuit - Google Patents
A kind of sintering anti-deformation method of ultrathin transparent ceramics curtain coating biscuit Download PDFInfo
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- CN106747352A CN106747352A CN201611128298.XA CN201611128298A CN106747352A CN 106747352 A CN106747352 A CN 106747352A CN 201611128298 A CN201611128298 A CN 201611128298A CN 106747352 A CN106747352 A CN 106747352A
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- biscuit
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- ultrathin transparent
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- smooth flat
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—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
- 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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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
- C04B35/505—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds based on yttrium oxide
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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
- C04B35/515—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
- C04B35/58—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/581—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on aluminium nitride
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6581—Total pressure below 1 atmosphere, e.g. vacuum
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
- C04B2235/662—Annealing after sintering
Abstract
The invention discloses a kind of sintering anti-deformation method of ultrathin transparent ceramics curtain coating biscuit, it is characterized in that, the ultrathin transparent biscuit of ceramics (6) prepared using doctor-blade casting process is after dumping, during vacuum-sintering is densified, between ultrathin transparent biscuit of ceramics (6) to be fixed on two smooth flat tungsten plates (1) of anti-deformation device.Anti-deformation device is during biscuit of ceramics sintering shrinkage, shunk in real time in the presence of tungsten spring (3), smooth flat tungsten plate (1) and ultrathin transparent ceramic body (6) is persistently set to keep being in close contact and controlled with this in sintering process because the face type that base substrate shrinks inconsistent generation distorts, it is ensured that flatness.Scale production in enormous quantities, improve product quality degree of unification can be adapted to.
Description
Technical field
The present invention relates to a kind of sintering anti-deformation method of ultrathin transparent ceramics curtain coating biscuit, belong to the life of thin slice ceramic product
Produce technical field.
Background technology
The preparation of crystalline ceramics includes that biscuit of ceramics is molded and two big processing steps of sintering.Biscuit of ceramics moulding process is to pottery
The transparent considerable influence of porcelain finished product, briquetting pressure is big, and biscuit density is high to be conducive to densified sintering product, and certain equipment requirement is high.Mesh
Before, the moulding process of commonplace application has：Dry-pressing, injection forming, isostatic pressing and flow casting molding etc., it is dry-pressing formed to have
Process is simple, easy to operate, cycle is short, but benefit is low, die wear big, processed complex, high cost, pressurization when pressure distribution not
Uniformly cause Density inhomogeneity, so that producing the phenomenons such as cracking, layering.Injection forming can prepare complex-shaped base substrate, but after
Dumping cycle phase complexity long；Isostatic pressing pressure action effect is good；Blank density is high, but can not produce complex-shaped base
Body.
Because the face thickness rate of superthin section crystalline ceramics is very big, several moulding process of the above are not suitable for preparing ultra-thin ceramic base
Body, and flow casting molding is that stream of slurry is dried in modular belt, thickness can prepare ultra-thin ceramic base by scraper control
Body, this external equipment is simple, process stabilizing, and shaping is controllable, and production efficiency is high, is capable of achieving the advantages of automating.
However, the problems such as serious contraction distortion occurs after ceramic green is prepared, in sintering process.Although biscuit
Density is than more uniform, but ultra-thin biscuit is when preventing from being sintered on flat board, can not with flat board contact surface in its contraction process
The generation frictional force for avoiding, along with contraction process, the ceramic surface after burning till has corrugated " arching upward ".Although can lead to
Cross the modes such as regulation and control heating rate and temperature increasing schedule to control, but problem on deformation cannot be fully solved.It is upper that common experience is used
The mode of ballast can also hinder the free shrink process of ceramics, influence densification.In order to solve this problem, patent CN
202885562U devises a kind of load bearing board of large scale thin slice ceramics, and it is next that this load bearing board can be heated evenly ceramic sheet
The uniform purpose of contraction is reached, a smooth briquetting is reconfigured in addition to fire smooth ceramics.Patent CN 101219898A are used
The method of flame-proof sphere is laid to solve the problems, such as ceramic deformation.But above anti-deformation mode is not suitable for thin slice crystalline ceramics, because
Ceramics are very thin, broken, cause yield rate low, and cost increases.
The content of the invention
For the problem of thin slice biscuit of ceramics deformation in existing sintering process, a kind of ultrathin transparent ceramics stream of present invention design
Prolong the sintering anti-deformation method of biscuit, it is characterised in that the ultrathin transparent biscuit of ceramics prepared using doctor-blade casting process is passed through
After dumping, during vacuum-sintering is densified, ultrathin transparent biscuit of ceramics is fixed in " sandwich " form anti-
Between two smooth flat tungsten plates of deformation device；
The anti-deformation device includes two blocks of smooth flat tungsten plates with size, described smooth four through holes of corner of flat tungsten plate
Inside up and down through there is series connection screw rod, the series connection screw rod two ends are cased with fixing nut, the fixing nut and smooth flat tungsten plate table
Tungsten spring is provided between face；The anti-deformation device is placed in vacuum furnace chamber and horizontal by 30 °~90 ° angles.
Further, described two smooth flat tungsten plate spacing are mutually all 1~3mm, the light with ultrathin transparent biscuit of ceramics thickness
The flat tungsten board size of cunning is 1.2~2.0 times of ultrathin transparent biscuit of ceramics size.
Further, the ultrathin transparent biscuit of ceramics is (50~300) mm × (50~300) through the area after pre-burning dumping
Mm, thickness is 50 μm~2mm.
Further, the series connection screw rod keeps 1~5cm with ultrathin transparent biscuit of ceramics edge.
Controlled with this in sintering process because the face type that base substrate shrinks inconsistent generation distorts, it is ensured that flatness.
Beneficial effects of the present invention are：
1. the invention provides it is a kind of prepare ultrathin transparent ceramics method, low for equipment requirements, low cost, efficiency high,
Thickness is controllable.Scale production in enormous quantities, improve product quality degree of unification can be adapted to.This preparation method is especially suitable for preparing thin
Piece crystalline ceramics.
2. anti-deformation device can effectively solve the problems, such as to deform during ceramic post sintering.Anti-deformation device is in biscuit of ceramics
During sintering shrinkage, shrink in real time under the action of the spring, persistently make smooth flat tungsten plate keep being in close contact with ceramic body.
At the same time, anti-deformation device has certain gradient, and ceramics can freely discharge under gravity during sintering should
Power, can effectively solve the problems, such as to keep deformation.
Brief description of the drawings
Fig. 1 is anti-deformation device side view；
Fig. 2 is anti-deformation device top view.
Wherein：1st, smooth flat tungsten plate；2nd, series connection screw rod；3rd, tungsten spring；4th, fixing nut；5th, vacuum furnace chamber；6th, it is ultra-thin
Bright biscuit of ceramics.
Specific embodiment
With reference to instantiation, the present invention is described further, but should not limit protection model of the invention with this
Enclose.
As shown in Figures 1 and 2, a kind of sintering anti-deformation method of ultrathin transparent ceramics curtain coating biscuit, it is characterised in that adopt
The ultrathin transparent biscuit of ceramics 6 prepared with doctor-blade casting process, through dumping after, vacuum-sintering obtain densification process
In, between ultrathin transparent biscuit of ceramics 6 is fixed on into two smooth flat tungsten plates 1 of anti-deformation device in " sandwich " form；It is described anti-
Deformation device includes running through up and down in two blocks of smooth flat tungsten plates 1 with size, described smooth 1 four through holes of corner of flat tungsten plate to be had
Series connection screw rod 2, series connection screw rod 2 two ends are cased with fixing nut 4, are set between the fixing nut 4 and the smooth flat surface of tungsten plate 1
There is tungsten spring 3.By the synchronous nut 4 that is locked, make two pieces of smooth flat spacing of tungsten plate 1 and the thickness of ultrathin transparent biscuit of ceramics 6
Unanimously；, horizontal by 30 °~90 ° angles, ceramics can under gravity freely during sintering for the anti-deformation device
Release stress, can effectively solve the problems, such as to keep deformation.
Embodiment one：YAG ultrathin transparents ceramics
By YAG slurries (n (Y2O3)/n(Al2O3)=3:5) it is cast, the base substrate area after dumping is 50mm × 300mm, thick
It is 1mm to spend.Ultrathin transparent biscuit of ceramics 6 after dumping is placed on anti-deformation device, and with the spiral shell of connecting on anti-deformation device
The edge of bar 2 keeps 3cm, and the smooth flat size of tungsten plate 1 is 1.5 times of the size of ultrathin transparent biscuit of ceramics 6, and thickness is 2mm.Anti-deformation
Device is horizontal by 60 °.The vacuum-sintering 24h at 1850 DEG C, anneal 8h at 1200 DEG C, obtains smooth ultra-thin
Bright ceramic sheet.
Embodiment two：Y2O3Ultrathin transparent ceramics
By Y2O3Slurry is cast, and the base substrate area after dumping is 100mm × 200mm, and thickness is 50 μm.It is super after by dumping
Thin crystalline ceramics biscuit 6 is placed on anti-deformation device, and keeps 1cm with the edge of screw rod 2 of connecting on anti-deformation device, smooth flat
The size of tungsten plate 1 is 1.2 times of the size of ultrathin transparent biscuit of ceramics 6, and thickness is 1mm.Anti-deformation device is horizontal by 30 °.Through
Again in 1700 DEG C of HIP sintering 12h, anneal 1500 DEG C of air pre-sintering 8h 8h at 1200 DEG C, obtains smooth surpassing
Thin crystalline ceramics thin slice.
Embodiment 3 three：AlN ultrathin transparents ceramics
By AlN slurries curtain coating, the base substrate area after dumping is 300mm × 200mm, and thickness is 2mm.It is ultra-thin after by dumping
Crystalline ceramics biscuit 6 is placed on anti-deformation device, and keeps 5cm, smooth flat tungsten with the edge of screw rod 2 of connecting on anti-deformation device
The size of plate 1 is 2 times of the size of ultrathin transparent biscuit of ceramics 6, and thickness is 3mm.Anti-deformation device is horizontal by 90 °.1700
Vacuum-sintering 12h at DEG C, anneal 12h at 1400 DEG C, then polished obtains smooth crystalline ceramics thin slice.
Claims (4)
1. a kind of ultrathin transparent ceramics are cast the sintering anti-deformation method of biscuit, it is characterised in that prepared using doctor-blade casting process
After the ultrathin transparent biscuit of ceramics (6) for obtaining is through dumping, during vacuum-sintering is densified, by ultrathin transparent ceramics
Between biscuit (6) is fixed on two smooth flat tungsten plates (1) of anti-deformation device in " sandwich " form；
The anti-deformation device includes two pieces of smooth flat tungsten plates (1) with size, described (1) four corner of smooth flat tungsten plate it is logical
Up and down through there is series connection screw rod (2) in hole, described series connection screw rod (2) two ends are cased with fixing nut (4), the fixing nut (4)
Be provided with tungsten spring (3) between smooth flat tungsten plate (1) surface, the anti-deformation device be placed in vacuum furnace chamber (5) and with level
Face is in 30 °~90 ° angles.
2. a kind of ultrathin transparent ceramics according to claim 1 are cast the sintering anti-deformation method of biscuit, it is characterised in that
Two smooth flat tungsten plate (1) spacing is identical with ultrathin transparent biscuit of ceramics (6) thickness and be 1~3mm, the smooth flat tungsten plate
(1) size is 1.2~2.0 times of ultrathin transparent biscuit of ceramics (6) size.
3. a kind of ultrathin transparent ceramics according to claim 1 are cast the sintering anti-deformation method of biscuit, it is characterised in that
The ultrathin transparent biscuit of ceramics (6) is (50~300) mm × (50~300) mm through the area after pre-burning dumping, and thickness is 50 μ
M~2mm.
4. a kind of ultrathin transparent ceramics according to claim 1 are cast the sintering anti-deformation method of biscuit, it is characterised in that
Series connection screw rod (2) keeps 1~5cm with ultrathin transparent biscuit of ceramics (6) edge.
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| CN201611128298.XA CN106747352B (en) | 2016-12-09 | 2016-12-09 | A kind of sintering anti-deformation method of ultrathin transparent ceramics curtain coating biscuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473751A (en) * | 2017-07-27 | 2017-12-15 | 佛山市非特新材料有限公司 | A kind of preparation method of two-part sintering ceramic mold core |
| CN110411153A (en) * | 2019-07-16 | 2019-11-05 | 山东工业陶瓷研究设计院有限公司 | A kind of quickly drying method of thin wall hollow earthenware slab film green body |
| CN114603140A (en) * | 2022-05-12 | 2022-06-10 | 西部宝德科技股份有限公司 | Porous metal film sintering device and method |
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| CN202063841U (en) * | 2011-06-02 | 2011-12-07 | 山东建筑大学 | Fixture for polarizing piezoelectric ceramic wafers |
| CN203420013U (en) * | 2013-08-12 | 2014-02-05 | 元鸿（山东）光电材料有限公司 | Tungsten plate heater for sapphire crystal growth |
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| CN2775845Y (en) * | 2005-01-31 | 2006-04-26 | 同济大学 | High temperature polarizing device for piezoelectric ceramics |
| CN1962106A (en) * | 2006-12-15 | 2007-05-16 | 西部金属材料股份有限公司 | Method for leveling tungsten plate with high straightness |
| CN202063841U (en) * | 2011-06-02 | 2011-12-07 | 山东建筑大学 | Fixture for polarizing piezoelectric ceramic wafers |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473751A (en) * | 2017-07-27 | 2017-12-15 | 佛山市非特新材料有限公司 | A kind of preparation method of two-part sintering ceramic mold core |
| CN107473751B (en) * | 2017-07-27 | 2019-10-25 | 佛山市非特新材料有限公司 | A kind of production method of two-part sintering ceramic mold core |
| CN110411153A (en) * | 2019-07-16 | 2019-11-05 | 山东工业陶瓷研究设计院有限公司 | A kind of quickly drying method of thin wall hollow earthenware slab film green body |
| CN114603140A (en) * | 2022-05-12 | 2022-06-10 | 西部宝德科技股份有限公司 | Porous metal film sintering device and method |
| CN114603140B (en) * | 2022-05-12 | 2022-08-05 | 西部宝德科技股份有限公司 | Porous metal film sintering device and method |
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