CN104400882A - Mirror blank preparation device and preparation method for carborundum reflecting mirror - Google Patents
Mirror blank preparation device and preparation method for carborundum reflecting mirror Download PDFInfo
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- CN104400882A CN104400882A CN201410604521.8A CN201410604521A CN104400882A CN 104400882 A CN104400882 A CN 104400882A CN 201410604521 A CN201410604521 A CN 201410604521A CN 104400882 A CN104400882 A CN 104400882A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
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Abstract
The invention discloses a mirror blank preparation device and a preparation method for a carborundum reflecting mirror, and belongs to the technical field of material preparation. A technical problem of incomplete blank since bubbles exist in the bank and unsolidified slurry exists on the surface of the blank or in the blank when a thin-wall complex-shape mirror blank of the carborundum reflecting mirror is prepared by gel injection molding forming in the prior art can be solved. The mirror blank preparation device for the carborundum reflecting mirror comprises a vacuum cavity, a vacuum gauge, a vacuum pump, a Y-pipe, an air charging device, a die, a slurry injection pipe, a slurry tank, a valve operating rod, a hubbed flange, a first flat flange and a second flat flange. Slurry is injected into the die through the slurry injection pipe under the action of the internal and external air pressure difference of the vacuum cavity to eliminate an oxygen inhibition effect on the surface and in the blank, so that the surface of the blank is smooth and is free from pits, and the integrity and the dimension accuracy of the blank are guaranteed.
Description
Technical field
The invention belongs to technical field of material, be specifically related to a kind of silicon carbide mirror mirror base preparation facilities and preparation method.
Background technology
Carborundum (SiC) because of its specific stiffness large, the features such as thermal coefficient of expansion is little, good stability of the dimension, and thermal conductivity is high, good optical manufacturing performance are considered to a kind of ideal spacing reflection mirror material.But the preparation of large scale uniform silicon carbide ceramic body is more difficult, and due to the needs of lightweight structure, the structure of speculum is general comparatively complicated.
Gel casting forming belongs to the one of wet moulding, is suitable for the consistent ceramic base substrate preparing big-size complicated shape.In gel casting forming process, the step of most critical is the cross-linking reaction of monomer, but the cross-linking reaction of monomer is by O
2impact very large, O
2existence can stop the carrying out (oxygen inhibition) of cross-linking reaction, thus the slurry inner or top layer of shaping base substrate being had cannot solidify and form defect.
The situation that in existing Gel-casting process, oxygen inhibition occurs has following several respects:
1, under atmospheric environment, not exclusively smooth due to die surface, when filled therewith mould, the air of die surface pit can not be discharged mould thus be caused base substrate top layer slurry herein to solidify; These slurries that cannot solidify are easy to come off and cause billet surface defect.
2, in slurry preparation process, inevitably air produces bubbles is entrained into, and the O in bubble
2bubble surrounding slurry can be stoped to solidify, and these uncured slurries can regard the defect of base substrate as, and the pore that bubble is formed after slurry curing is also a kind of defect.
3, for the mould with similar blind hole structure, be difficult under atmospheric environment ensure that slurry is full of mould completely, easily form air layer at the blind hole structure end of mould, cause base substrate imperfect herein; And can not be able to solidify because of oxygen inhibition near the slurry of blind hole end, cause blank structure imperfect further.
Further, in dry run, the base substrate of uncured slurry and around base substrate and other normal cure shrinks inconsistent, easily causes base substrate to occur crackle.
These above-mentioned defects can destroy the uniformity of base substrate, reduce base substrate mechanical property; And for the speculum of thin-wall construction, above-mentioned various defects can cause catastrophic consequence, the SiC mirror base prepared is caused to use.
Summary of the invention
The object of the invention is to solve when gel casting forming prepares the carborundum mirror base of thin-wall complicated shape in prior art, there is bubble in base substrate inside, there is uncured slurry in billet surface or inside, cause the incomplete technical problem of base substrate, a kind of silicon carbide mirror mirror base preparation facilities and preparation method are provided.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows.
Silicon carbide mirror mirror base preparation facilities, comprises vacuum chamber, vacuum meter, vavuum pump, Y-pipe, aerating device, mould, Grouting Pipe, slurry tank, valve operation lever, hubbed flange, the first flat flange and the second flat flange;
Described vacuum chamber is provided with observation window;
Described vacuum meter is for detecting the vacuum of vacuum chamber;
First catheter port of described Y-pipe is communicated with vacuum chamber, and the second catheter port is connected with vavuum pump, and the 3rd catheter port is connected with aerating device, and the second conduit is provided with the first valve, and the 3rd conduit is provided with the second valve;
Described mould is placed in vacuum chamber;
Described Grouting Pipe is made up of upper Grouting Pipe, middle Grouting Pipe and lower Grouting Pipe, one end of described middle Grouting Pipe is connected with one end of upper Grouting Pipe, the other end is connected with one end of lower Grouting Pipe, the internal diameter of middle Grouting Pipe is less than or equal to the internal diameter of Grouting Pipe, and be greater than the internal diameter of lower Grouting Pipe, middle Grouting Pipe is through the lower shoe of vacuum chamber, and be fixed on the lower shoe of vacuum chamber by the first flat flange, and to be sealed and matched gap by an O RunddichtringO, Grouting Pipe in vacuum chamber is provided with the 3rd valve, and the other end of lower Grouting Pipe inserts in slurry tank;
The neck of described hubbed flange embeds the grouting port of mould, and the port of neck is concordant with the inner surface of mould, the other end of upper Grouting Pipe stretches into the neck of hubbed flange and is communicated with mould, second flat flange is sleeved on outside Grouting Pipe, and hubbed flange and the second flat flange are bolted on mould, between hubbed flange and the second flat flange, be provided with the 2nd O RunddichtringO;
One end of described valve operation lever is connected with the valve rod of the 3rd valve, and the other end reaches outside vacuum chamber.
Further, described vacuum chamber is made up of upper plate, lower shoe and sidewall, and described observation window is arranged on sidewall.
Further, be provided with the first bracing frame in described vacuum chamber, mould is placed on the first bracing frame.
Further, lighting device is provided with in described vacuum chamber.
Further, described vacuum meter one end is stretched in vacuum chamber, and the other end is connected with display.
Further, be connected between described middle Grouting Pipe with lower Grouting Pipe by reducer union, described upper Grouting Pipe is connected by the 3rd valve with middle Grouting Pipe.
Further, described device also comprises for supporting the second bracing frame of vacuum chamber and the back-up block for supporting slurry tank.
Adopt above-mentioned silicon carbide mirror mirror base preparation facilities to prepare the method for silicon carbide mirror mirror base, comprise the following steps:
Step one, close the second valve and the 3rd valve, open the first valve, vacuum chamber is vacuumized, then close the first valve, open the second valve, in vacuum chamber, be filled with N by aerating device
2to atmospheric pressure, then close the second valve, open the first valve, again vacuum chamber is vacuumized;
Step 2, close the first valve, pour slurry into slurry tank, the end of lower Grouting Pipe submerges in slurry;
Step 3, open the 3rd valve, slurry injects mould by Grouting Pipe under the effect of vacuum chamber inner and outer air pressure difference, observes mould rising head gush out after slurry and close the 3rd valve by observation window;
Step 4, open the second valve, in vacuum chamber, be filled with air by aerating device and make vacuum chamber internal gas pressure identical with external atmosphere pressure;
Step 5, after slurry curing, take out mould, the unnecessary biscuit outside excision mould grouting port;
Step 6, removal mould, after drying, degreasing, sintering, obtain silicon carbide mirror mirror base.
Further, also comprised before step one, the inwall of upper Grouting Pipe is coated with and is covered with releasing agent.
Further, in described step one, the second time air pressure vacuumized in final vacuum chamber is 1KPa-60KPa.
Compared with prior art, beneficial effect of the present invention is:
1, silicon carbide mirror mirror base preparation facilities of the present invention and method, eliminate the billet surface oxygen inhibition caused due to die surface out-of-flatness, make billet surface bright and clean, without pit;
2, silicon carbide mirror mirror base preparation facilities of the present invention and method, the low pressure of vacuum environment makes the bubble in slurry acutely expand and break, base substrate inside is avoided to produce pore and oxygen inhibition, eliminate base substrate internal flaw, and slurry can be full of mould completely under vacuum environment, ensure integrality and the dimensional accuracy of base substrate.
Accompanying drawing explanation
Fig. 1 is the structural representation of silicon carbide mirror mirror base preparation facilities of the present invention;
Fig. 2 is upper Grouting Pipe and mould connection diagram in silicon carbide mirror mirror base preparation facilities of the present invention;
In figure, 1, vacuum chamber, 1-1, observation window, 1-2, lighting device, 1-3, the first bracing frame, 2, vacuum meter, 3, vavuum pump, 4, Y-pipe, 4-1, the first valve, 4-2, the second valve, 5, aerating device, 6, mould, 7, Grouting Pipe, 7-1, upper Grouting Pipe, 7-2, middle Grouting Pipe, 7-3, lower Grouting Pipe, 7-4, the 3rd valve, 8, slurry tank, 9, valve operation lever, 10, hubbed flange, 11, the second flat flange, 12, the second bracing frame, 13, back-up block, the 14, the 2nd O RunddichtringO.
Detailed description of the invention
The present invention is further illustrated below in conjunction with Fig. 1 and Fig. 2 and detailed description of the invention.
Silicon carbide mirror mirror base preparation facilities of the present invention, comprises vacuum chamber 1, vacuum meter 2, vavuum pump 3, Y-pipe 4, aerating device 5, mould 6, Grouting Pipe 7, slurry tank 8, valve operation lever 9, hubbed flange 10, first flat flange and the second flat flange 11; Wherein, vacuum chamber 1 is hermetically-sealed construction, be made up of upper plate, lower shoe and sidewall, vacuum chamber 1 is provided with observation window 1-1, for observing the inner case of vacuum chamber 1, observation window 1-1 is generally arranged on sidewall, for the ease of observing, can be provided with lighting device 1-2 in vacuum chamber 1, lighting device 1-2 is generally arranged on upper plate, can also be provided with the first bracing frame 1-3 for supporting mould 6 in vacuum chamber 1.One end of vacuum meter 2 is stretched in vacuum chamber 1, and the other end is stayed outside vacuum chamber 1, for detecting the vacuum of vacuum chamber 1, clearer in order to show, and one end that outside stayed by vacuum meter 2 can be connected with display.Y-pipe 4 is those skilled in the art's well known structures, be made up of the first conduit, the second conduit and the 3rd conduit, the port of the first conduit is communicated with vacuum chamber 1, the port of the second conduit is connected with vavuum pump 3, the port of the 3rd conduit is connected with aerating device 5, and vacuumize and the independent operation of inflating to realize, the second conduit is provided with the first valve 4-1, and the 3rd conduit is provided with the second valve 4-2.The structure of mould 6 is not particularly limited, and for mould commonly used by silicon carbide mirror mirror base, mould 6 is provided with grouting port and rising head, and mould 6 is placed in vacuum chamber 1, if be provided with the first bracing frame 1-3 in vacuum chamber 1, mould 6 is placed on the first bracing frame 1-3.Grouting Pipe 7 is made up of upper Grouting Pipe 7-1, middle Grouting Pipe 7-2 and lower Grouting Pipe 7-3, one end of middle Grouting Pipe 7-2 is connected with one end of upper Grouting Pipe 7-1, the other end of middle Grouting Pipe 7-2 is connected with one end of lower Grouting Pipe 7-3, and upper Grouting Pipe 7-1, middle Grouting Pipe 7-2 and lower Grouting Pipe 7-3 are stainless pipe; Wherein, the internal diameter of upper Grouting Pipe 7-1 is more than or equal to the internal diameter of middle Grouting Pipe 7-2, and the internal diameter of middle Grouting Pipe 7-2 is greater than the internal diameter of lower Grouting Pipe 7-3; Through the lower shoe of vacuum chamber 1, (upper Grouting Pipe 7-1 stays in vacuum chamber 1 middle Grouting Pipe 7-2, it is outer that lower Grouting Pipe 7-3 extend out to vacuum chamber 1), one O RunddichtringO and the first flat flange are sleeved on outside middle Grouting Pipe 7-2 successively, and the first flat flange is bolted on the lower shoe of vacuum chamber 1, first flat flange be used for fixing in Grouting Pipe 7-2, an O RunddichtringO is sealed and matched gap; The other end of lower Grouting Pipe 7-3 inserts in slurry tank 8; The neck of hubbed flange 10 embeds the grouting port of mould 6, the port of neck is concordant with the inner surface of the bottom of mould 6, the other end of upper Grouting Pipe 7-1 is communicated with mould 6 through hubbed flange 10, second flat flange 11 is sleeved on outside Grouting Pipe 7-1, and the second flat flange 11 and hubbed flange 10 are bolted on mould 6, for realizing sealing, between the second flat flange 11 and hubbed flange 10, be provided with the 2nd O RunddichtringO 14 (it is outer that the 2nd O RunddichtringO 14 is sleeved on Grouting Pipe 7-1); Optional position in the Grouting Pipe 7 of vacuum chamber 1 inside is provided with the 3rd valve 7-4, and one end of valve operation lever 9 is connected with the valve rod of the 3rd valve 7-4, and the other end reaches outside vacuum chamber 1; Slurry tank 8 for holding slurry, and is communicated with air.
In present embodiment, upper Grouting Pipe 7-1 and middle Grouting Pipe 7-2 can integrated molding, also can be connected by the 3rd valve 7-4, and middle Grouting Pipe 7-2 and lower Grouting Pipe 7-3 can integrated molding, also can be connected by reducer union.
In present embodiment, for ease of operation, vacuum chamber 1 can be placed on the second bracing frame 12, and slurry tank 8 is placed on back-up block 13.
The present invention also provides the method adopting above-mentioned silicon carbide mirror mirror base preparation facilities to prepare silicon carbide mirror mirror base, comprises the following steps:
Step one, by the inwall of upper Grouting Pipe 7-1 be coated be covered with releasing agent;
If upper Grouting Pipe 7-1 is connected by valve with middle Grouting Pipe 7-2, take off Grouting Pipe 7-1, the grouting port place of mould 6 will be connected to after upper Grouting Pipe 7-1 inwall coating releasing agent again by hubbed flange 10, the 2nd O RunddichtringO 14 and the second flat flange 11; If upper Grouting Pipe 7-1 and middle Grouting Pipe 7-2 and/or lower Grouting Pipe 7-3 integrated molding, when taking off Grouting Pipe 7-1, relatedly take off middle Grouting Pipe 7-2 and/or lower Grouting Pipe 7-3, after upper Grouting Pipe 7-1 inwall coating releasing agent, middle Grouting Pipe 7-2 and/or lower Grouting Pipe 7-3 is also installed back original position;
Step 2, close the second valve 4-2 and the 3rd valve 7-4, open the first valve 4-1, being evacuated to its air pressure inside to vacuum chamber 1 is 1KPa, the most of O in removing vacuum chamber 1
2, then close the first valve 4-1, open the second valve 4-2, in vacuum chamber 1, be filled with N by aerating device 5
2to atmospheric pressure, O residual in dilution vacuum chamber 1
2, then close the second valve 4-2, open the first valve 4-1, being again evacuated to its air pressure inside to vacuum chamber 1 is 1KPa-60KPa, to reduce the O in vacuum chamber 1 further
2content;
Step 3, close the second valve 4-2, slurry is poured into slurry tank 8, the lower end of lower Grouting Pipe 7-3 is submerged in slurry, wherein, slurry can be prepared according to patent CN101941231B slurry that solid concentration is 67.5vol% and add catalyst and initator obtains (namely according to claim steps in CN101941231B 1)-4) preparation);
Step 4, open the 3rd valve 7-4, slurry injects mould 6 by Grouting Pipe 7 under the effect of vacuum chamber 1 inner and outer air pressure difference, observes mould 6 rising head gush out after slurry and close the 3rd valve 7-4 by observation window 1-1;
Step 5, open the second valve 4-2, in vacuum chamber 1, be filled with air by aerating device 5 and make vacuum chamber 1 internal gas pressure identical with external atmosphere pressure;
Step 6, after slurry curing, general hardening time is more than 2h, takes out mould 6;
If upper Grouting Pipe 7-1 is connected by valve with middle Grouting Pipe 7-2,3rd valve 7-4 is removed from Grouting Pipe 7, then removes the second flat flange 11 and the 2nd O RunddichtringO 14, then rotate dismounting hubbed flange 10, finally remove upper Grouting Pipe 7-1, take out mould 6; If upper Grouting Pipe 7-1 and middle Grouting Pipe 7-2 and/or lower Grouting Pipe 7-3 integrated molding, by the 3rd valve 7-4 after Grouting Pipe 7 dismounting, first the first flat flange and an O RunddichtringO are removed, remove the second flat flange 11, the 2nd O RunddichtringO 14 and hubbed flange 10 again, finally, Grouting Pipe 7-1 (in related removal Grouting Pipe 7-2 and/or lower Grouting Pipe 7-3) in removal, takes out mould 6;
The unnecessary biscuit that step 7, the outer slurry of excision mould 6 grouting port solidify to form;
Step 8, remove mould 6, after biscuit drying, degreasing, sintering, obtain silicon carbide mirror mirror base, wherein, drying, degreasing can by the technological operation in patent CN101941231B.
Embodiment 1
Step one, upper Grouting Pipe 7-1 internal diameter 21mm, middle Grouting Pipe 7-2 internal diameter 19mm, lower Grouting Pipe 7-3 internal diameter 16mm, one end of upper Grouting Pipe 7-1 is connected by the 3rd valve 7-4 with one end of middle Grouting Pipe 7-2, the other end of middle Grouting Pipe 7-2 is connected by reducer union with one end of lower Grouting Pipe 7-3, upper Grouting Pipe 7-1 is pulled down from device, after inwall coating releasing agent, device is in statu quo installed;
Step 2, close the second valve 4-2 and the 3rd valve 7-4, open the first valve 4-1,1KPa is evacuated to vacuum chamber 1, then close the first valve 4-1, open the second valve 4-2, in vacuum chamber 1, be filled with N by aerating device 5
2to 100KPa, then close the second valve 4-2, open the first valve 4-1, again 1KPa is evacuated down to vacuum chamber 1;
Step 3, closing the first valve 4-1, is the SiC slurry of 67.5vol% by the method preparation 17.8Kg solid concentration in patent CN101941231B, and ball milling 5h; Then slurry is taken out, de-bubble 5min under 2000KPa air pressure; Again slurry to be poured in the cylindrical container of Φ 200mm and to make its temperature be down to 18 DEG C; Stir afterwards while add the 10wt% ammonium persulfate solution of 2mL tetramethylethylenediamine and 25mL, obtain slurry to be formed, pour slurry to be formed into slurry tank 8, the lower end of lower Grouting Pipe 7-3 is submerged in slurry to be formed, about 5mm bottom slurry tank 8;
Step 4, open the 3rd valve 7-4, slurry to be formed injects mould 6 under the effect of vacuum chamber 1 inner and outer air pressure difference, observes mould 6 rising head gush out after slurry to be formed and close the 3rd valve 7-4 by observation window 1-1;
Step 5, open the second valve 4-2, in vacuum chamber 1, be filled with air by aerating device 5 and make vacuum chamber 1 internal gas pressure identical with external atmosphere pressure;
After step 6, cured at room temperature 2h, the 3rd valve 7-4 is removed from Grouting Pipe 7, then removes the second flat flange 11 and the 2nd O RunddichtringO 14, then rotate dismounting hubbed flange 10, finally remove upper Grouting Pipe 7-1, take out mould 6;
The unnecessary biscuit that step 7, the outer slurry of excision mould 6 grouting port solidify to form;
Step 8, removal mould 6, after biscuit drying, degreasing, repeatedly sintering (method by patent CN101941231B), obtain silicon carbide mirror mirror base.
Obviously, the explanation of above embodiment just understands core concept of the present invention for helping.It should be pointed out that the those of ordinary skill for described technical field, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. silicon carbide mirror mirror base preparation facilities, it is characterized in that, comprise vacuum chamber (1), vacuum meter (2), vavuum pump (3), Y-pipe (4), aerating device (5), mould (6), Grouting Pipe (7), slurry tank (8), valve operation lever (9), hubbed flange (10), the first flat flange and the second flat flange (11);
Described vacuum chamber (1) is provided with observation window (1-1);
Described vacuum meter (2) is for detecting the vacuum of vacuum chamber (1);
First catheter port of described Y-pipe (4) is communicated with vacuum chamber (1), second catheter port is connected with vavuum pump (3), 3rd catheter port is connected with aerating device (5), and the second conduit is provided with the first valve (4-1), the 3rd conduit is provided with the second valve (4-2);
Described mould (6) is placed in vacuum chamber (1);
Described Grouting Pipe (7) is by upper Grouting Pipe (7-1), middle Grouting Pipe (7-2) and lower Grouting Pipe (7-3) composition, one end of described middle Grouting Pipe (7-2) is connected with one end of upper Grouting Pipe (7-1), the other end is connected with one end of lower Grouting Pipe (7-3), the internal diameter of middle Grouting Pipe (7-2) is less than or equal to the internal diameter of Grouting Pipe (7-1), and be greater than the internal diameter of lower Grouting Pipe (7-3), middle Grouting Pipe (7-2) is through the lower shoe of vacuum chamber (1), and be fixed on the lower shoe of vacuum chamber (1) by the first flat flange, and to be sealed and matched gap by an O RunddichtringO, Grouting Pipe (7) in vacuum chamber (1) is provided with the 3rd valve (7-4), the other end of lower Grouting Pipe (7-3) inserts in slurry tank (8),
The neck of described hubbed flange (10) embeds the grouting port of mould (6), and the port of neck is concordant with the inner surface of mould (6), the other end of upper Grouting Pipe (7-1) stretches into the neck of hubbed flange (10) and is communicated with mould (6), second flat flange (11) is sleeved on Grouting Pipe (7-1) outward, and hubbed flange (10) and the second flat flange (11) are bolted on mould (6), between hubbed flange (10) and the second flat flange (11), be provided with the 2nd O RunddichtringO (14);
One end of described valve operation lever (9) is connected with the valve rod of the 3rd valve (7-4), and the other end reaches vacuum chamber (1) outward.
2. silicon carbide mirror mirror base preparation facilities according to claim 1, it is characterized in that, described vacuum chamber (1) is made up of upper plate, lower shoe and sidewall, and described observation window (1-1) is arranged on sidewall.
3. silicon carbide mirror mirror base preparation facilities according to claim 1, it is characterized in that, be provided with the first bracing frame (1-3) in described vacuum chamber (1), mould (6) is placed on the first bracing frame (1-3).
4. silicon carbide mirror mirror base preparation facilities according to claim 1, is characterized in that, be provided with lighting device (1-2) in described vacuum chamber (1).
5. silicon carbide mirror mirror base preparation facilities according to claim 1, it is characterized in that, described vacuum meter (2) one end is stretched in vacuum chamber (1), and the other end is connected with display.
6. silicon carbide mirror mirror base preparation facilities according to claim 1, it is characterized in that, be connected by reducer union between described middle Grouting Pipe (7-2) with lower Grouting Pipe (7-3), described upper Grouting Pipe (7-1) is connected by the 3rd valve (7-4) with middle Grouting Pipe (7-2).
7. silicon carbide mirror mirror base preparation facilities according to claim 1, it is characterized in that, described device also comprises the second bracing frame (12) for supporting vacuum chamber (1) and the back-up block (13) for supporting slurry tank (8).
8. adopt silicon carbide mirror mirror base preparation facilities according to claim 1 to prepare the method for silicon carbide mirror mirror base, it is characterized in that, comprise the following steps:
Step one, close the second valve (4-2) and the 3rd valve (7-4), open the first valve (4-1), vacuum chamber (1) is vacuumized, then the first valve (4-1) is closed, open the second valve (4-2), in vacuum chamber (1), be filled with N by aerating device (5)
2to atmospheric pressure, then close the second valve (4-2), open the first valve (4-1), again vacuum chamber (1) is vacuumized;
Step 2, close the first valve (4-1), slurry is poured into slurry tank (8), the end of lower Grouting Pipe (7-3) submerges in slurry;
Step 3, open the 3rd valve (7-4), slurry injects mould (6) by Grouting Pipe (7) under the effect of vacuum chamber (1) inner and outer air pressure difference, observes mould (6) rising head gush out after slurry and close the 3rd valve (7-4) by observation window (1-1);
Step 4, open the second valve (4-2), in vacuum chamber (1), be filled with air by aerating device (5) and make vacuum chamber (1) internal gas pressure identical with external atmosphere pressure;
Step 5, after slurry curing, take out mould (6), excision mould (6) grouting port outside unnecessary biscuit;
Step 6, removal mould (6), after drying, degreasing, sintering, obtain silicon carbide mirror mirror base.
9. the preparation method of silicon carbide mirror mirror base according to claim 8, is characterized in that, also comprised before step one, is coated with by the inwall of upper Grouting Pipe (7-1) and is covered with releasing agent.
10. the preparation method of silicon carbide mirror mirror base according to claim 8, is characterized in that, in described step one, the second time air pressure vacuumized in final vacuum chamber (1) is 1KPa-60KPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106827179A (en) * | 2017-03-28 | 2017-06-13 | 沈阳第水泵有限责任公司 | A kind of monoblock type ceramic pump pump housing ceramics casting mold and its ring structure |
| CN110821032A (en) * | 2019-10-31 | 2020-02-21 | 中建材料技术研究成都有限公司 | Light heat-preservation high-toughness cement-based composite wallboard and preparation process thereof |
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| JP2009086287A (en) * | 2007-09-28 | 2009-04-23 | Univ Nagoya | Reflecting mirror, method of manufacturing the same, method of cleaning the same, and light source device |
| CN102313916A (en) * | 2010-07-07 | 2012-01-11 | 罗万前 | In-situ preparation method for SiC reflective mirror blank and device |
| CN101941231A (en) * | 2010-09-09 | 2011-01-12 | 中国科学院长春光学精密机械与物理研究所 | Gel injection molding technology of large-sized and complicated-shape silicon carbide ceramic biscuit |
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| CN106827179A (en) * | 2017-03-28 | 2017-06-13 | 沈阳第水泵有限责任公司 | A kind of monoblock type ceramic pump pump housing ceramics casting mold and its ring structure |
| CN106827179B (en) * | 2017-03-28 | 2022-08-05 | 沈阳第一水泵有限责任公司 | Integral ceramic pump body ceramic casting mold and compression ring structure thereof |
| CN110821032A (en) * | 2019-10-31 | 2020-02-21 | 中建材料技术研究成都有限公司 | Light heat-preservation high-toughness cement-based composite wallboard and preparation process thereof |
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Effective date of registration: 20210520 Address after: Room 0225, building 2, incubation base, 19 Yingkou Road, Changchun Economic Development Zone, Jilin Province Patentee after: Changchun Changguang fine porcelain composite material Co.,Ltd. Address before: 130033, 3888 southeast Lake Road, Jilin, Changchun Patentee before: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences |
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