CN109665869A - A kind of means of defence of graphite crucible - Google Patents
A kind of means of defence of graphite crucible Download PDFInfo
- Publication number
- CN109665869A CN109665869A CN201910088610.4A CN201910088610A CN109665869A CN 109665869 A CN109665869 A CN 109665869A CN 201910088610 A CN201910088610 A CN 201910088610A CN 109665869 A CN109665869 A CN 109665869A
- Authority
- CN
- China
- Prior art keywords
- crucible
- graphite
- graphite paper
- thickness
- paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5057—Carbides
- C04B41/5059—Silicon carbide
Abstract
The invention discloses a kind of means of defences of graphite crucible, it comprises the following methods, a, graphite paper is cut first, in accordance with the size of graphite crucible, crucible bottom is laid in by the disk equal with crucible internal diameter is cut into a thickness of 0.8mm graphite paper, rectangular slat will be cut into a thickness of the graphite paper of 0.3mm and be rolled into tubular and be placed in inside crucible, be close to crucible internal walls；The graphite crucible handled well is put into metallic silicon power by b, and reaction-sintered is carried out at 1500 DEG C, and the graphite paper at crucible bottom and inner wall reacts to form silicon carbide protective layer with metallic silicon power, to prevent reacting for Si and graphite crucible itself.The present invention generates silicon carbide protective layer on the inner wall of crucible, can protect to crucible, and can prevent cracking; heat resistanceheat resistant vibration property, the impact resistance for improving crucible, substantially extend the service life of crucible, and process for making is simple; cost of material is low, is suitable for quantifying to process.
Description
Technical field
The present invention relates to chemical industry protection technology field, specially a kind of means of defence of graphite crucible.
Background technique
Silicon carbide ceramics is high with elevated temperature strength and good in oxidation resistance, wear-resisting property and thermal stability, thermal expansion coefficient is small,
Thermal conductivity is high, good chemical stability, in addition to being used as grinding agent and refractory material, silicon carbide products in wear-resistant parts and
Application in precise lathe cutting parts also gradually increases.
The most commonly used is reaction sintering and hot pressing sintering method, reaction-sintereds in the industrialized production of silicon carbide ceramics at present
In the process, different degrees of cracking is easy to appear as the graphite crucible of reaction vessel, the crack location of impaired crucible usually collects
In in crucible internal walls bottom surface and side infall.It is gathered in crucible bottom after melting at high temperature due to metallic silicon power, is caused
Temperatures at localized regions is excessively high, and partial melting silicon reacts to form silicon carbide with graphite crucible, during the reaction with volume expansion.
Meanwhile the infall curvature of bottom surface and side is larger in crucible internal walls, and stress is caused to concentrate, therefore in reaction expansion process
Cause graphite crucible to intersect along this to crack at circumference, to discharge the stress inside crucible material, for the above, how send out
A kind of means of defence of bright graphite crucible out reduces silicon carbide ceramics and other is related to improve graphite crucible service life
The production cost of product becomes our problems to be solved.
Summary of the invention
The purpose of the present invention is to provide a kind of means of defences of graphite crucible, significantly improve the protection to crucible,
Service life is extended, prevents from cracking.
The present invention is to solve above-mentioned phenomenon, using the technical solution of following modification, a kind of means of defence of graphite crucible, and packet
Following methods step is included,
A cuts graphite paper first, in accordance with the size of graphite crucible, will be cut into a thickness of 0.8mm graphite paper with
The equal disk of crucible internal diameter is laid in crucible bottom, will cut into rectangular slat with a thickness of the graphite paper of 0.3mm and rolls up
It is placed in inside crucible at tubular, is close to crucible internal walls；
The graphite crucible handled well is put into metallic silicon power by b, carries out reaction-sintered at 1500 DEG C, crucible bottom and interior
Graphite paper at wall reacts to form silicon carbide protective layer with metallic silicon power, to prevent reacting for Si and graphite crucible itself.
As present invention further optimization mode, in step a, wherein the graphite paper disk for being placed in crucible bottom is 2~3
Layer, the graphite paper bobbin thickness for being tightly attached to crucible internal walls is also 2~3 layers.
As present invention further optimization mode, in step a, the junction of crucible internal walls and crucible bottom is arc knot
Structure is then filled and is bonded using the mixture of powdered graphite and 2130# phenolic resin.
As present invention further optimization mode, in step b, the metallic silicon power is evenly laid out at the top of graphite paper,
Thickness is set as 5mm.
Beneficial effects of the present invention are as follows: the present invention will be by utilizing metallic silicon power and graphite paper in high temperature sintering
Chemical reaction is generated, silicon carbide protective layer is generated on the inner wall of crucible, crucible can be protected, and can prevent
Cracking improves heat resistanceheat resistant vibration property, the impact resistance of crucible, substantially extends the service life of crucible, and process for making letter
Single, cost of material is low, is suitable for quantifying to process.
Specific embodiment
Below in conjunction in the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution: a kind of means of defence of graphite crucible comprises the following methods,
A cuts graphite paper first, in accordance with the size of graphite crucible, will be cut into a thickness of 0.8mm graphite paper with
The equal disk of crucible internal diameter is laid in crucible bottom, will cut into rectangular slat with a thickness of the graphite paper of 0.3mm and rolls up
It is placed in inside crucible at tubular, is close to crucible internal walls；
The graphite crucible handled well is put into metallic silicon power by b, carries out reaction-sintered at 1500 DEG C, crucible bottom and interior
Graphite paper at wall reacts to form graphite protective layer with metallic silicon power, to prevent reacting for Si and graphite crucible itself.
In step a, wherein the graphite paper disk for being placed in crucible bottom is 2~3 layers, it is tightly attached to the graphite paper roll of crucible internal walls
Barrel thickness is also 2~3 layers.
In step a, the junction of crucible internal walls and crucible bottom is arcuate structure, then uses powdered graphite and 2130# phenol
The mixture of urea formaldehyde is filled and is bonded.
As present invention further optimization mode, in step b, the metallic silicon power is evenly laid out at the top of graphite paper,
Thickness is set as 5mm.
Protection crucible method parameter table of the invention is as follows: table 1
Traditional protection crucible method parameter table is as follows: table 2
By table 1 and table 2 obviously it can be seen that method performance of the invention is more preferable, method is more excellent.
To sum up, the present invention will generate chemical reaction in high temperature sintering by utilization metallic silicon power and graphite paper,
Silicon carbide protective layer is generated on the inner wall of graphite crucible, crucible can be protected, and can prevent cracking, be improved
Heat resistanceheat resistant vibration property, the impact resistance of crucible, substantially extend the service life of crucible, and process for making is simple, cost of material
It is low, it is suitable for quantifying to process.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
It is interior.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (4)
1. a kind of means of defence of graphite crucible, it is characterised in that: it comprises the following methods,
A cuts graphite paper first, in accordance with the size of graphite crucible, will be cut into a thickness of 0.8mm graphite paper and crucible
The equal disk of internal diameter is laid in crucible bottom, will cut into rectangular slat with a thickness of the graphite paper of 0.3mm and is rolled into cylinder
Shape is placed in inside crucible, is close to crucible internal walls；
The graphite crucible handled well is put into metallic silicon power by b, carries out reaction-sintered at 1500 DEG C, at crucible bottom and inner wall
Graphite paper react to form silicon carbide protective layer with metallic silicon power, to prevent reacting for Si and graphite crucible itself.
2. a kind of means of defence of graphite crucible according to claim 1, which is characterized in that in step a, wherein being placed in earthenware
The graphite paper disk of crucible bottom is 2~3 layers, and the graphite paper bobbin thickness for being tightly attached to crucible internal walls is also 2~3 layers.
3. a kind of means of defence of graphite crucible according to claim 1, which is characterized in that in step a, crucible internal walls with
The junction of crucible bottom is arcuate structure, then is filled and is glued using the mixture of powdered graphite and 2130# phenolic resin
It connects.
4. a kind of means of defence of graphite crucible according to claim 1, which is characterized in that in step b, the metallic silicon
Powder is evenly laid out at the top of graphite paper, and thickness is set as 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088610.4A CN109665869A (en) | 2019-01-29 | 2019-01-29 | A kind of means of defence of graphite crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088610.4A CN109665869A (en) | 2019-01-29 | 2019-01-29 | A kind of means of defence of graphite crucible |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109665869A true CN109665869A (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910088610.4A Pending CN109665869A (en) | 2019-01-29 | 2019-01-29 | A kind of means of defence of graphite crucible |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201317827Y (en) * | 2008-11-27 | 2009-09-30 | 上海九晶电子材料股份有限公司 | Plumbago-pot used in czochralski crystal growing furnace |
| CN202401160U (en) * | 2011-12-31 | 2012-08-29 | 宁波科论太阳能有限公司 | Czochralski crystal growing furnace |
| CN202595333U (en) * | 2012-05-23 | 2012-12-12 | 陕西西京电子科技有限公司 | Novel graphite crucible |
| CN103787694A (en) * | 2013-12-23 | 2014-05-14 | 大连理工大学 | Method for preparing SiC coating on surface of graphite crucible by using in-situ reaction method |
| RU2540668C1 (en) * | 2013-12-11 | 2015-02-10 | Федеральное государственное бюджетное учреждение науки Инситут физики твердого тела Российской академии наук (ИФТТ РАН) | Method for preparing silicone carbide plates |
-
2019
- 2019-01-29 CN CN201910088610.4A patent/CN109665869A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201317827Y (en) * | 2008-11-27 | 2009-09-30 | 上海九晶电子材料股份有限公司 | Plumbago-pot used in czochralski crystal growing furnace |
| CN202401160U (en) * | 2011-12-31 | 2012-08-29 | 宁波科论太阳能有限公司 | Czochralski crystal growing furnace |
| CN202595333U (en) * | 2012-05-23 | 2012-12-12 | 陕西西京电子科技有限公司 | Novel graphite crucible |
| RU2540668C1 (en) * | 2013-12-11 | 2015-02-10 | Федеральное государственное бюджетное учреждение науки Инситут физики твердого тела Российской академии наук (ИФТТ РАН) | Method for preparing silicone carbide plates |
| CN103787694A (en) * | 2013-12-23 | 2014-05-14 | 大连理工大学 | Method for preparing SiC coating on surface of graphite crucible by using in-situ reaction method |
Non-Patent Citations (1)
| Title |
|---|
| BACK-SUB SUNG ET AL.: "SiC Conversion Coating Prepared from Silica-Graphite Reaction", 《ADVANCES IN MATERIALS SCIENCE AND ENGINEERING》 * |
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Application publication date: 20190423 |