CN109761608A - A method of rodlike composite transparent ceramic is prepared based on direct write molding 3D printing technique - Google Patents

A method of rodlike composite transparent ceramic is prepared based on direct write molding 3D printing technique Download PDF

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CN109761608A
CN109761608A CN201910171710.3A CN201910171710A CN109761608A CN 109761608 A CN109761608 A CN 109761608A CN 201910171710 A CN201910171710 A CN 201910171710A CN 109761608 A CN109761608 A CN 109761608A
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direct write
ceramic
printing
ceramics
liquid storage
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唐飞
唐定远
王俊
刘鹏
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Jiangsu Normal University
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Jiangsu Normal University
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Abstract

The invention discloses a kind of methods for preparing rodlike composite transparent ceramic based on direct write molding 3D printing technique, and step is: preparing 3D printing rare earth doped ceramics slurry Re:M and the undoped ceramic slurry M of rare earth respectively;The two different slurries of Re:M, M are transferred to respectively in the liquid storage device A and liquid storage device B of 3D printing direct write rapidform machine, design the three-dimensional structure of composite transparent ceramic, and write direct write printing shaping program, accurate control Re:M, M slurry enters the rate of nozzle chamber and the printing rate of direct write rapidform machine, realizes that radially continuous alternation occurs slurry for the relative amount of two kinds of ceramic slurries at different location;Then composite ceramics green body further progress isostatic cool pressing after molding and low-temperature defatted processing carry out long-time sintering under the conditions of high-temperature vacuum and hot isostatic pressing respectively, realize the continuously distributed of crystalline ceramics concentration gradient by the thermal diffusion of Doped ions.This method preparation is simple, and condition is controllable, easily operated popularization.

Description

A method of rodlike composite transparent ceramic is prepared based on direct write molding 3D printing technique
Technical field
The invention belongs to field of ceramic preparation technology, are related to a kind of preparation of crystalline ceramics, and in particular to one kind is based on straight The method that write forming 3D printing technique prepares rodlike composite transparent ceramic.
Background technique
Crystalline ceramics as a kind of novel optics polycrystalline material, because its with excellent mechanical performance, thermal property with And the features such as optical property, was always treated as that monocrystalline can be replaced to become for high power solid state laser at the past 20 years Actual gain medium.However when large power pumping optical acts on the ceramics, what material internal was generated because absorbing a large amount of pump lights Fuel factor problem, which becomes, restricts the critical bottleneck that its acquisition is more preferably applied.The heat management regulation method of conventional laser material is mainly sharp The after-heat in laser medium is removed with heat sink equal cooling mode, this cooling method inevitably results in material surface and inside Inhomogeneous cooling and space heat consumption be unevenly distributed, final result will cause shown in laser ceramics internal temperature uneven distribution.This The difference of kind Temperature Distribution causes material internal respectively to differential expansion, to generate serious fuel factor and enable crystal modification, significant to drop Low pump light is in brilliant intracorporal transfer efficiency.In order to efficiently solve " fuel factor " this problem from material itself, phase at present Guan researcher generally focuses on the research of layered, transparent ceramics, which is based primarily upon the preparation process of high technology ceramics using more Prepared by the lamination compact technique of layer green body, it is intended to alleviate material in pumping light action by the controllable design to ceramic structure Influence of the lower fuel factor to laser activity.
So far, for the research of solid laser material composite construction, there are mainly of two types.First is that with thermal diffusion key The bonded crystals of conjunction technology preparation are research object.For example, Kracht in 2005 et al. utilizes the rodlike of 5 sections of different levels of doping Compound Nd:YAG crystal realizes the laser output power of 407W, and its maximum temperature and stress all significantly decrease. Anhui ray machine institute, Chinese Academy of Sciences Fang in 2017 et al. has studied the GYSGG crystal for the output of 2.79m laser, and discovery passes through design The influence that fuel factor exports laser can be effectively reduced in the composite construction of laser crystal, significantly improves laser output quality. Er:Yb:YAl is respectively adopted in Fujian Inst. of Matter Structure, Chinese Academy of Sciences Huang Yidong researchers in 2018 and its Team Member3 (BO3)4/YAl3(BO3)4And sapphire/Er:Yb:YAl3(BO3)4/ sapphire composite crystal as working-laser material, wherein Using doped portion as gain media, it is used as heat absorption medium undoped with part, result of study shows can using the composite construction To be effectively improved influence of the fuel factor to laser output quality, facilitate the continuous laser output of high-quality.Another kind of is with essence The layered, transparent ceramics of fine ceramic technique preparation are research object as laser gain medium.For example, Harbin industry in 2016 University Ma et al. was discussed in detail YAG/Nd:YAG/YAG three-stage composite ceramics and Nd:YAG block ceramic in heat distribution and swashed It is relatively excellent in terms of thermo parameters method to confirm that concentration gradient laser ceramics has from experimental viewpoint for characteristic in terms of optical property Gesture.Shanghai University Of Engineering Science Cheng in 2017 et al. carries out analog study using Matlab software, has analysed in depth Tm:YAG Thermo parameters method characteristic of the gradient type composite ceramics under optical pumping effect, demonstrates from theoretical visual angle along single direction gradient The laser ceramics of structure has unique modulating properties in heat distribution management aspect.The famous ceramic science man of Japan in 2018 Ikesue et al., which further points out the multistage crystalline ceramics based on the preparation of thermal bonding technology, to be had in the property such as machinery, optics, calorifics The excellent characteristics of energy aspect can realize that high-efficiency and continuous laser exports as gain media.The above research sufficiently shows solid Laser material is designed to that composite construction helps to optimize material thermo parameters method internal under optical pumping effect, realizes efficiently high Quality laser output.
Nevertheless, the research work of associated laser material still faces lot of challenges.First from the preparation angle of material For, the preparation of the concentration gradient crystalline ceramics with excellent optical quality is mainly still based on thermal diffusion bonding techniques, but The technology is high for precision polishing technique requirement, and ceramic surface flatness needs to reach Nano grade after polishing, while must also The technology having in terms of crystalline ceramics seriously must be limited using expensive post-hiped technique, these process conditions Effect is used.Secondly, the research of crystalline ceramics gradient composite construction is concentrated mainly on the one of Doped ions through-thickness at present Tie up concentration distribution, for Doped ions concentration gradient multi-dimensional design and cut out and its caused thermo parameters method to laser export The influencing mechanism of characteristic is rarely reported at present.
Summary of the invention
The object of the present invention is to provide a kind of sides that rodlike composite transparent ceramic is prepared based on direct write molding 3D printing technique Method, realize Doped ions concentration in ceramic body radially there is two-dimentional concentration gradient distribution.
To achieve the above object, The technical solution adopted by the invention is as follows: a kind of form 3D printing technique system based on direct write The method of standby rodlike composite transparent ceramic, comprising the following steps:
S1,3D printing rare earth doped ceramics slurry Re:M and the undoped ceramic slurry M of rare earth are prepared respectively;
S2, liquid storage device A and the storage that the two different slurries of Re:M, M are transferred to 3D printing direct write rapidform machine respectively In liquid device B, and one end of liquid storage device A and liquid storage device B is made to be connected respectively with the adapter of gas pressure regulator, liquid storage device A and storage The other end of liquid device B is connect with the nozzle chamber of direct write rapidform machine respectively, and gas cylinder A passes through pressure valve A connection pressure control Device, gas cylinder B pass through pressure valve B connection nozzle chamber;
S3, using the three-dimensional structure of computer-aided software engineering composite transparent ceramic, and write direct write and be printed as Type program adjusts total gas pressure P, the P range of two liquid storage devices of input in 10Pa~2 × 10 by pressure valve A6Pa, according to ceramics Depending on the viscosity of slurry is of different sizes, the air pressure P of input liquid storage device A is then adjusted by Partial Pressure Controller1With input liquid storage device B Air pressure P2, P1、P2Scope control is 0~2 × 106Pa and meet P=P1+P2, so that accurately control Re:M, M slurry enters spray The rate of mouth cavity, the sum of feed rate of two kinds of slurries range adjust input spray in 0~1000ml/min, by pressure valve B The intracorporal air pressure P ' of mouth chamber and P '≤P, the accurate printing rate for controlling direct write rapidform machine;By way of being successively superimposed, The radially printing speed molding for realizing two kinds of slurries of Re:M, M, obtains rod shaped ceramic idiosome;
S4, the ceramic idiosome of direct write printing shaping is first subjected to cold isostatic compaction under pressure, it then will be cold Green body after isostatic pressing, which is placed under oxygen atmosphere, carries out low-temperature defatted processing;
S5, the green body after degreasing is subjected to high-temperature vacuum sintering, obtains fine and close ceramic sintered bodies;
S6, sintered ceramic body successively carry out high annealing and precise polished processing under the conditions of oxygen-containing atmosphere.
Preferably, in step S1, ceramic slurry preparation process is: by a certain proportion of material powder, solvent, dispersing agent, Binder and plasticiser carry out ball milling mixing, and the ceramic slurry of suitable solid content and viscosity is made, wherein the solvent be go from Sub- water, solid content are 50vol%~55vol%, and the additional amount of the dispersing agent is 2wt.%, and the additional amount of the binder is 1.5wt.%, the additional amount of the plasticiser are 2wt.%.
Preferably, the dispersing agent is glycerine, and the binder is polyvinyl alcohol, and the plasticiser is polyethylene glycol.
Preferably, in step S1, ceramic M is yttrium oxide, luteium oxide, scandium oxide, Y3Al5O12, Lu3Al5O12One of, Rare earth Re is neodymium, ytterbium, erbium, thulium, holmium, dysprosium, praseodymium, samarium, chromium, one of lanthanum.
Preferably, in step S3, the printing rate is 50~1000ml/min.
Preferably, in step S4, the pressure limit of the isostatic cool pressing is in 100~200MPa, 2~10min of dwell time; 700~800 DEG C of the ungrease treatment temperature range, 5~20h of calcination time.
Preferably, in step S5, vacuum ranges < 10-3Pa, vacuum-sintering temperature range are 1600 DEG C~1900 DEG C, are burnt The knot time is 5~50h.
Preferably, in step S6, the annealing region is at 1300~1600 DEG C, 5~20h of annealing time.
Further, in step S6, silicon carbide and aluminium oxide are respectively adopted in the polishing treatment as grinding and polishing Material.
Further, in step S5, further HIP sintering is taken to handle on the ceramics after vacuum-sintering, heat etc. is quiet 1600~1700 DEG C of sintering temperature of pressure, sintering time are 2~10h, to improve the consistency of ceramics.
The present invention is based on improved, and 3D printing slurry direct write molding (DIW) technology with twin refuelling system realizes ceramic blank The radial distribution of internal Doped ions concentration, the height for passing through Doped ions in conjunction with high-temperature vacuum and HIP sintering technique Warm the continuously distributed crystalline ceramics of flooding mechanism preparation concentration gradient.
Compared to the steady temperature field distribution along single direction concentration gradient laser ceramics with obvious orientation, this hair It is bright to be had using the crystalline ceramics with two-dimentional concentration gradient distribution characteristics radially as laser gain medium Effect alleviates heat distribution and is orientated problem, realizes the thermo parameters method of space uniform, facilitates the stabilization of high-efficiency high power continuous laser Output.
It is expected to alleviate in the case where pumping light action using composite transparent ceramic material prepared by the present invention as laser gain medium The influence that material internal thermal lensing effect exports material laser.
Preparation method provided by the invention is easy to operate, and condition is controllable, easy to spread.
Detailed description of the invention
Fig. 1 is 3D printing DIW moulding process flow process figure of the invention;
Fig. 2 is the concentration distribution schematic diagram of Doped ions in crystalline ceramics before being sintered after 3D printing DIW is formed;
Fig. 3 is the concentration distribution schematic diagram of Doped ions in crystalline ceramics after being sintered;
Fig. 4 is the relative density variation tendency of ceramic body and sintered body in preparation process;
In figure, 1- liquid storage device A, 2- liquid storage device B, 3- Partial Pressure Controller, 4- gas cylinder A, 5- pressure valve A, 6- nozzle, 7- gas cylinder B, 8- pressure valve B.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, the equipment of the invention based on direct write molding 3D printing technique includes 3D printing direct write rapid shaping Liquid storage device A1, liquid storage device B2, Partial Pressure Controller 3, gas cylinder A4, gas cylinder B7, nozzle 6, pressure valve A5, the pressure valve B8 of machine, liquid storage One end of device A1 and liquid storage device B2 are connected with Partial Pressure Controller 3 respectively, the other end of liquid storage device A1 and liquid storage device B2 respectively with 6 cavity of nozzle of direct write rapidform machine connects, and for gas cylinder A4 by pressure valve A5 connection Partial Pressure Controller 3, gas cylinder B7 passes through control 6 cavity of pressure valve B8 connection nozzle, 6 diameter dimension < 0.5 millimeter of nozzle.
Total gas pressure P, the P range of two liquid storage devices of input is adjusted in 10Pa~2 × 10 by pressure valve A56Pa, according to pottery Depending on the viscosity of porcelain slurry is of different sizes, then pass through the air pressure P of the adjustment input of Partial Pressure Controller 3 liquid storage device A11It is stored up with input The air pressure P of liquid device B22, P1、P2Scope control is 0~2 × 106Pa and meet P=P1+P2, input spray is adjusted by pressure valve B8 The intracorporal air pressure P ' of 6 chamber of mouth and P '≤P.
The raw material that ceramic slurry is prepared in following embodiment is the oxidate powder of purity>99.99%, partial size<5 micron Body, and it is all based on direct write molding 3D printing equipment as shown in Figure 1.
The rodlike crystalline ceramics of embodiment 1:Yb:YAG concentration gradient
The stoichiometric ratio for being primarily based on YAG and Yb:YAG weighs material powder yttrium oxide, aluminium oxide, oxidation respectively Ytterbium, then using deionized water as solvent, in 55vol%, addition glycerine is dispersing agent (2wt.%) for the solid content control of slurry, Polyvinyl alcohol is binder (1.5wt.%), and polyethylene glycol is plasticiser (2wt.%), is prepared by long-time planetary type ball-milling Obtain the preferable two kinds of ceramic slurries of rheological property.Then Yb:YAG, YAG slurry are respectively placed in liquid storage device A1 and liquid storage device B2 Interior, by accurately controlling feed rate, (constant the sum of Yb:YAG, YAG slurry feed rate is 100ml/min, wherein Yb:YAG Slurry feed rate is gradually increased to 100ml/min by 0,0) YAG slurry feed rate is gradually decrease to and is beaten by 100ml/min Print rate (50ml/min) prepares bar shaped ceramic base substrate, however successively improves the intensity of green body and low using isostatic cool pressing processing Warm ungrease treatment excludes the intracorporal organic component of base, and isostatic cool pressing pressure limit is 100MPa, dwell time 2min, at degreasing Managing temperature range is 700 DEG C, calcination time 5h.Ceramic body after degreasing, which is first placed in vacuum high temperature furnace, carries out long-time burning Knot, vacuum ranges < 10-3Pa, 1700 DEG C of vacuum-sintering temperature, sintering time 15h, then again by the sintered body after vacuum-sintering It is placed in hot isostatic pressing furnace and handles, 1600 DEG C of HIP sintering temperature, sintering time 2h.By sintered body through 1400 DEG C of oxygen Anneal 5h under atmosphere, finally carries out precise polished processing as grinding and polishing material to get institute is arrived using silicon carbide and aluminium oxide The concentration gradient crystalline ceramics of the radially continuous distribution needed.
Embodiment 2:Yb:Lu2O3Rodlike crystalline ceramics
It is primarily based on Lu2O3And Yb:Lu2O3Stoichiometric ratio weigh material powder luteium oxide, ytterbium oxide respectively, so Afterwards using deionized water as solvent, in 50vol%, addition glycerine is dispersing agent (2wt.%), poly- second for the solid content control of slurry Enol is binder (2wt.%), and polyethylene glycol is plasticiser (2wt.%), and stream is prepared by long-time planetary type ball-milling Denaturation can preferable two kinds of ceramic slurries.Then by Yb:Lu2O3、Lu2O3Slurry is respectively placed in liquid storage device A1 and liquid storage device B2, By accurately controlling feed rate (Yb:Lu2O3、Lu2O3Constant the sum of slurry feed rate is 300ml/min, wherein Yb:Lu2O3 Slurry feed rate is gradually increased to 300ml/min, Lu by 02O3Slurry feed rate by 300ml/min be gradually decrease to 0) and Printing rate (250ml/min) prepare bar shaped ceramic base substrate, however successively use isostatic cool pressing processing raising green body intensity with And low-temperature defatted processing excludes the intracorporal organic component of base, isostatic cool pressing pressure is 150MPa, dwell time 2min, at degreasing Managing temperature is 700 DEG C, calcination time 20h.Ceramic body after degreasing, which is first placed in vacuum high temperature furnace, carries out long-time sintering, Vacuum ranges < 10-3Pa, 1850 DEG C of sintering temperature, then the sintered body after vacuum-sintering is placed in heat etc. by sintering time 5h again Processing in static pressure furnace, 1600 DEG C of HIP sintering temperature, sintering time 10h.By sintered body through under 1550 DEG C of oxygen atmospheres Anneal 10h, is finally used as grinding and polishing material to carry out precise polished processing using silicon carbide and aluminium oxide required to get arriving The concentration gradient crystalline ceramics of radially continuous distribution.
Embodiment 3:Er:Y2O3Rodlike crystalline ceramics
It is primarily based on Y2O3And Er:Y2O3Stoichiometric ratio weigh material powder yttrium oxide, erbium oxide respectively, then Using deionized water as solvent, in 50vol%, addition glycerine is dispersing agent (2.5wt.%), poly- second for the solid content control of slurry Enol is binder (2wt.%), and polyethylene glycol is plasticiser (2wt.%), and stream is prepared by long-time planetary type ball-milling Denaturation can preferable two kinds of ceramic slurries.Then by Er:Y2O3、Y2O3Slurry is respectively placed in liquid storage device A1 and liquid storage device B2, is led to Cross accurate control feed rate (Er:Y2O3、Y2O3Constant the sum of slurry feed rate is 500ml/min, wherein Er:Y2O3Slurry Feed rate is gradually increased to 500ml/min, Y by 02O3Slurry feed rate is gradually decrease to 0) by 500ml/min and printing is fast Rate (400ml/min) prepares bar shaped ceramic base substrate, however the intensity and low temperature of green body are successively improved using isostatic cool pressing processing Ungrease treatment excludes the intracorporal organic component of base, and isostatic cool pressing pressure is 200MPa, dwell time 2min, ungrease treatment temperature It is 750 DEG C, calcination time 10h.Ceramic body after degreasing, which is first placed in vacuum high temperature furnace, carries out long-time sintering, vacuum degree Range < 10-3Pa, 1800 DEG C of sintering temperature, then the sintered body after vacuum-sintering is placed in hot isostatic pressing by sintering time 35h again Processing in furnace, 1700 DEG C of HIP sintering temperature, sintering time 2h.By sintered body through annealing under 1500 DEG C of oxygen atmospheres 20h is finally used as grinding and polishing material to carry out precise polished processing required along diameter to get arriving using silicon carbide and aluminium oxide To continuously distributed concentration gradient crystalline ceramics.
The rodlike crystalline ceramics of embodiment 4:Er:LuAG
The stoichiometric ratio for being primarily based on LuAG and Er:LuAG weighs material powder luteium oxide, aluminium oxide, oxidation respectively Erbium, then using deionized water as solvent, in 50vol%, addition glycerine is dispersing agent (2wt.%) for the solid content control of slurry, Polyvinyl alcohol is binder (1.5wt.%), and polyethylene glycol is plasticiser (2wt.%), is prepared by long-time planetary type ball-milling Obtain the preferable two kinds of ceramic slurries of rheological property.Then Er:LuAG, LuAG slurry are respectively placed in liquid storage device A1 and liquid storage device In B2, by accurately control feed rate (the sum of Er:LuAG, LuAG slurry feed rate is constant for 1000ml/min, wherein Er:LuAG slurry feed rate is gradually increased to 1000ml/min by 0, and LuAG slurry feed rate is gradually subtracted by 1000ml/min Bar shaped ceramic base substrate 0) as low as is prepared with printing rate (900ml/min), however green body is successively improved using isostatic cool pressing processing Intensity and low-temperature defatted processing exclude the intracorporal organic component of base, isostatic cool pressing pressure is 200MPa, and the dwell time is 10min.Ungrease treatment temperature is 800 DEG C, calcination time 20h.Ceramic body after degreasing be first placed in vacuum high temperature furnace into Row is sintered for a long time, vacuum ranges < 10-3Pa, 1600 DEG C of sintering temperature, sintering time 50h, then by the burning after vacuum-sintering Knot body is placed in hot isostatic pressing furnace again and handles, and 1700 DEG C of HIP sintering temperature, sintering time 10h.Sintered body is passed through Anneal 10h under 1350 DEG C of oxygen atmospheres, finally carries out precise polished place as grinding and polishing material using silicon carbide and aluminium oxide It manages to get the concentration gradient crystalline ceramics of required radially continuous distribution is arrived.
Fig. 2 gives Re:Lu before high temperature sintering2O3Doped ions concentration distribution signal in ceramic body radially Figure, it can be seen that doping replaces radial distribution with undoped green body, and adjacent doping is 0.2mm with undoped region overall width, Wherein doped region width gradually broadens from center to edge and then becomes narrow gradually undoped with peak width.It is set with by green body It is sintered for a long time in carrying out high temperature in vacuum drying oven and hot isostatic pressing furnace, adjacent two sides Doped ions are same under the driving of concentration gradient When to undoped with region carry out thermal diffusion (diffusion length and concentration gradient and sintering schedule are closely related), to be formed along diameter To direction Re3+The behavior of the slow gradual change of ion concentration, as shown in Figure 3.
Fig. 4 gives the variation tendency of each stage relative density of ceramic preparation process, it can be seen that composite ceramics Consistency can achieve 90% or so after high-temperature vacuum is sintered, close further across can achieve after HIP sintering 100%.

Claims (10)

1. a kind of based on the direct write molding 3D printing technique method for preparing rodlike composite transparent ceramic, which is characterized in that including with Lower step:
S1,3D printing rare earth doped ceramics slurry Re:M and the undoped ceramic slurry M of rare earth are prepared respectively;
S2, the liquid storage device A (1) and liquid storage that the two different slurries of Re:M, M are transferred to 3D printing direct write rapidform machine respectively In device B (2), and one end of liquid storage device A (1) and liquid storage device B (2) is made to be connected respectively with Partial Pressure Controller (3), liquid storage device A (1) It is connect respectively with the nozzle of direct write rapidform machine (6) cavity with the other end of liquid storage device B (2), gas cylinder A (4) passes through pressure valve A (5) Partial Pressure Controller (3) are connected, gas cylinder B (7) connects nozzle (6) cavity by pressure valve B (8);
S3, using the three-dimensional structure of computer-aided software engineering composite transparent ceramic, and write direct write printing shaping journey Sequence adjusts total gas pressure P, the P range of two liquid storage devices of input in 10Pa~2 × 10 by pressure valve A (5)6Pa, according to ceramic slurry Depending on the viscosity of material is of different sizes, then pass through the air pressure P of Partial Pressure Controller (3) adjustment input liquid storage device A (1)1It is stored up with input The air pressure P of liquid device B (2)2, P1、P2Scope control is 0~2 × 106Pa and meet P=P1+P2, thus accurately control Re:M, M slurry Material enters the rate of nozzle (6) cavity, and the sum of feed rate of two kinds of slurries range passes through pressure valve B in 0~1000ml/min (8) the intracorporal air pressure P ' of adjustment input nozzle (6) chamber and P '≤P, the accurate printing rate for controlling direct write rapidform machine;Pass through The mode being successively superimposed realizes the radially printing speed molding of two kinds of slurries of Re:M, M, obtains rod shaped ceramic idiosome;
S4, the ceramic idiosome of direct write printing shaping is first subjected to cold isostatic compaction under pressure, it then will be cold etc. quiet Green body after molded, which is placed under oxygen atmosphere, carries out low-temperature defatted processing;
S5, the green body after degreasing is subjected to high-temperature vacuum sintering, obtains fine and close ceramic sintered bodies;
S6, sintered ceramic body successively carry out high annealing and precise polished processing under the conditions of oxygen-containing atmosphere.
2. a kind of side for preparing rodlike composite transparent ceramic based on direct write molding 3D printing technique according to claim 1 Method, which is characterized in that in step S1, ceramic slurry preparation process is: it by a certain proportion of material powder, solvent, dispersing agent, glues It ties agent and plasticiser carries out ball milling mixing, the ceramic slurry of suitable solid content and viscosity is made, wherein the solvent is deionization Water, solid content are 50vol%~55vol%, and the additional amount of the dispersing agent is 2wt.%, and the additional amount of the binder is 1.5wt.%, the additional amount of the plasticiser are 2wt.%.
3. a kind of side for preparing rodlike composite transparent ceramic based on direct write molding 3D printing technique according to claim 2 Method, which is characterized in that the dispersing agent is glycerine, and the binder is polyvinyl alcohol, and the plasticiser is polyethylene glycol.
4. a kind of direct write molding 3D printing technique that is based on according to any one of claims 1 to 3 prepares rodlike composite transparent The method of ceramics, which is characterized in that in step S1, ceramic M is yttrium oxide, luteium oxide, scandium oxide, Y3Al5O12, Lu3Al5O12In One kind, rare earth Re be neodymium, ytterbium, erbium, thulium, holmium, dysprosium, praseodymium, samarium, chromium, one of lanthanum.
5. a kind of direct write molding 3D printing technique that is based on according to any one of claims 1 to 3 prepares rodlike composite transparent The method of ceramics, which is characterized in that in step S3, printing rate is 50~1000ml/min.
6. a kind of direct write molding 3D printing technique that is based on according to any one of claims 1 to 3 prepares rodlike composite transparent The method of ceramics, which is characterized in that in step S4, the pressure limit of the isostatic cool pressing is in 100~200MPa, dwell time 2 ~10min;700~800 DEG C of the ungrease treatment temperature range, 5~20h of calcination time.
7. a kind of direct write molding 3D printing technique that is based on according to any one of claims 1 to 3 prepares rodlike composite transparent The method of ceramics, which is characterized in that in step S5, vacuum ranges < 10-3Pa, vacuum-sintering temperature range be 1700 DEG C~ 1800 DEG C, sintering time is 10~50h.
8. a kind of direct write molding 3D printing technique that is based on according to any one of claims 1 to 3 prepares rodlike composite transparent The method of ceramics, which is characterized in that in step S6, the annealing region is at 1400~1500 DEG C, 5~20h of annealing time.
9. a kind of direct write molding 3D printing technique that is based on according to any one of claims 1 to 3 prepares rodlike composite transparent The method of ceramics, which is characterized in that in step S6, be respectively adopted in the polishing treatment silicon carbide and aluminium oxide as grinding and Polishing material.
10. a kind of direct write molding 3D printing technique that is based on according to any one of claims 1 to 3 prepares rodlike composite transparent The method of ceramics, which is characterized in that in step S5, further HIP sintering is taken to handle on the ceramics after vacuum-sintering, 1600~1700 DEG C of HIP sintering temperature, sintering time is 2~10h.
CN201910171710.3A 2019-03-07 2019-03-07 A method of rodlike composite transparent ceramic is prepared based on direct write molding 3D printing technique Pending CN109761608A (en)

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