CN105084875A - Production method for square fused quartz ceramic crucible - Google Patents
Production method for square fused quartz ceramic crucible Download PDFInfo
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- CN105084875A CN105084875A CN201410190808.0A CN201410190808A CN105084875A CN 105084875 A CN105084875 A CN 105084875A CN 201410190808 A CN201410190808 A CN 201410190808A CN 105084875 A CN105084875 A CN 105084875A
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Abstract
The invention discloses a production method for a square fused quartz ceramic crucible, and belongs to the field of re-processing of fused quartz. The product takes fused obtuse-angle quartz sand with SiO2 content which is 99.9% or more and diameter which is 0.075 mm-1.5 mm as a raw material; and a production process comprises: I, putting high-purity obtuse-angle quartz sand, in vacuum, into a graphite forming mould; II, carrying out electric-arc welding and forming on the raw material in vacuum; III, naturally cooling and de-molding the raw material; IV, spraying the raw material at a high pressure; and V, sintering the raw material in a kiln to obtain a finished product. The technological process has the main advantages that: the used devices are fewer, the investment is small, emission of poisonous and harmful gases and liquids is avoided, the product quality is good, and the high-quality square fused quartz ceramic crucible can be produced in batch.
Description
Technical field
The invention belongs to fused quartz reprocessing field, particularly relate to a kind of with the method for high-purity melting obtuse angle quartz sand for primary industryization production fused quartz ceramic crucible.
Background technology
Crucible is with the made vessel of fire-resistant material or melting pot, when there being solid will heat with big fire, just must use crucible.Crucible can be divided into by the starting material made: plumbago crucible, fused quartz ceramic crucible, porcelain crucible, corundum crucible, silicon carbide crucible, platinum crucible, nickel crucible.Due to high-purity fused quartz there is fine structure, the feature such as thermal conductivity is low, thermal expansivity is little, finished product dimensional precision is high, high temperature is indeformable, good thermal shock stability, good electrical property, chemerosiveness resistent are good, be therefore used widely in fields such as glass post-processing industry, metallurgical industry, electronic industry, chemical engineering industry, aerospace.The present invention is a kind of square fused quartz ceramic crucible, its dioxide-containing silica >=99.9%, and main application is: in the ingot casting link of polysilicon, serves as polysilicon material and long brilliant container.Fused quartz ceramic crucible is with its Heat stability is good, resistance to melt (silicon, aluminium, copper etc.) aggressiveness and to the characteristic such as processed goods are pollution-free, be widely used in production of polysilicon and non-ferrous metal metallurgy industry, make it to melt the polysilicon silicon ingot produced for manufacturing solar cell, because its working conditions is extremely harsh, there is extremely strict requirement to the purity of crucible, intensity, macroscopic irregularity, inner quality, high-temperature behavior, heat stability etc. of shaking.Product of the present invention can use below 1450 DEG C, has high purity, high thermal resistance is strong, precision is high, the advantage such as good heat preservation performance, steady quality.Fused silica crucible divides transparent, translucent and opaque three kinds, and product of the present invention is a kind of translucent quartz crucible, is exclusively used in and produces polysilicon, draws large-diameter monocrystalline silicon.The technical process of producing is: 1. high-purity melting obtuse angle quartz sand vacuum is loaded forming graphite mould; 2. vacuum arc is founded shaping; 3. the naturally cooling demoulding; 4. high-pressure spraying; Finished product is obtained after 5 kiln sintering.The raw material that the present invention uses is melting obtuse angle quartz sand, so-called obtuse angle refers to that the particle of quartz sand is polygon shape, angular but not radial spine thorn-like, the diameter of quartz sand is 0.075mm-1.5mm, and outward appearance is translucent crystalloid, is characterized in that SiO2 content is more than 99.9%.The major advantage of this technical process is: equipment used is few, it is little to invest, without toxic and harmful and liquid discharge, good product quality, can be mass and produce high-quality fused silica crucible.
Summary of the invention
The problem that the present invention mainly solves is to provide a kind of production method of square fused quartz ceramic crucible, and the raw material producing the use of this product is: the diameter of SiO2 content more than 99.9% is the melting obtuse angle quartz sand of 0.075mm-1.5mm.
The present invention can be achieved through the following technical solutions:
A production method for square fused quartz ceramic crucible, is characterized in that being made up of following steps:
(1) by quantitative SiO2 content more than 99.9%, diameter is that the melting obtuse angle quartz sand of 0.075mm-1.5mm sends into forming graphite mould under vacuum conditions, by the method for vibrations to reduce the space between quartz sand particle, the vibrations time is 15-20 minute.
(2) forming graphite mould is sent into electric arc furnace under vacuum conditions, in electric arc furnace, be heated to 1850-1870 DEG C, stop heating after making quartz sand all be in molten state, naturally cooling shifts out electric arc furnace after being cooled to normal temperature, sloughs forming graphite mould.
(3) shaping crucible high pressure water is carried out cleaning showers totally naturally to dry afterwards.
(4) crucible dried is sent into kiln and start heat temperature raising, first after sintering temperature is risen to 400 DEG C from 0 DEG C by the time of 2-3 hour slowly, in 1 hours, sintering temperature is risen to 1150-1200 DEG C from 400 DEG C fast again, stop heating after maintaining this temperature 26-28 hour, after being progressively cooled to normal temperature, obtain square fused quartz ceramic roller crucible.
(5) purposes of square fused quartz ceramic roller crucible is: as the ingot casting link at polysilicon, serves as polysilicon material and long brilliant container.
Further technical scheme of the present invention is:
Described in step (2) under vacuum conditions with electric arc furnace heating temperature be 1860 DEG C.
Sintering temperature in kiln described in step (4) is 1175 DEG C, and the total time of sintering is 27 hours.Kiln described in step (4) is coal gas generation shuttle kiln.
The invention has the beneficial effects as follows: the production method providing a kind of square fused quartz ceramic crucible, this production method has the series of advantages such as use equipment is few, technique is simple, pollution-free waste discharge, good product quality; The square fused quartz ceramic crucible of product has excellent thermal characteristics, chemical stability and electrical insulation capability below 1200 DEG C, and the ultimate temperature of use can reach 1450 DEG C.
Embodiment
The present invention is further described by following examples.
Embodiment 1:
By quantitative SiO2 content more than 99.9%, diameter is that the melting obtuse angle quartz sand of 0.075mm-1.5mm sends into forming graphite mould under vacuum conditions, by the method for vibrations to reduce the space between quartz sand particle, the vibrations time is 15 minutes; Forming graphite mould is sent into electric arc furnace under vacuum conditions, is heated to 1870 DEG C in electric arc furnace, stop heating after making quartz sand all be in molten state, naturally cooling shifts out electric arc furnace after being cooled to normal temperature, sloughs forming graphite mould; Shaping crucible high pressure water is carried out cleaning showers totally naturally to dry afterwards; The crucible dried is sent into kiln and starts heat temperature raising, first after sintering temperature is risen to 400 DEG C from 0 DEG C by the time of 2-3 hour slowly, in 1 hours, sintering temperature is risen to 1150 DEG C from 400 DEG C fast again, maintain this temperature and after 28 hours, stop heating, after being progressively cooled to normal temperature, obtain square fused quartz ceramic roller crucible.
Embodiment 2:
By quantitative SiO2 content more than 99.9%, diameter is that the melting obtuse angle quartz sand of 0.075mm-1.5mm sends into forming graphite mould under vacuum conditions, by the method for vibrations to reduce the space between quartz sand particle, the vibrations time is 17.5 minutes; Forming graphite mould is sent into electric arc furnace under vacuum conditions, is heated to 1860 DEG C in electric arc furnace, stop heating after making quartz sand all be in molten state, naturally cooling shifts out electric arc furnace after being cooled to normal temperature, sloughs forming graphite mould; Shaping crucible high pressure water is carried out cleaning showers totally naturally to dry afterwards; The crucible dried is sent into kiln and starts heat temperature raising, first after sintering temperature is risen to 400 DEG C from 0 DEG C by the time of 2-3 hour slowly, in 1 hours, sintering temperature is risen to 1175 DEG C from 400 DEG C fast again, maintain this temperature and after 27 hours, stop heating, after being progressively cooled to normal temperature, obtain square fused quartz ceramic roller crucible.
Embodiment 3:
By quantitative SiO2 content more than 99.9%, diameter is that the melting obtuse angle quartz sand of 0.075mm-1.5mm sends into forming graphite mould under vacuum conditions, by the method for vibrations to reduce the space between quartz sand particle, the vibrations time is 20 minutes; Forming graphite mould is sent into electric arc furnace under vacuum conditions, is heated to 1850 DEG C in electric arc furnace, stop heating after making quartz sand all be in molten state, naturally cooling shifts out electric arc furnace after being cooled to normal temperature, sloughs forming graphite mould; Shaping crucible high pressure water is carried out cleaning showers totally naturally to dry afterwards; The crucible dried is sent into kiln and starts heat temperature raising, first after sintering temperature is risen to 400 DEG C from 0 DEG C by the time of 2-3 hour slowly, in 1 hours, sintering temperature is risen to 1200 DEG C from 400 DEG C fast again, maintain this temperature and after 26 hours, stop heating, after being progressively cooled to normal temperature, obtain square fused quartz ceramic roller crucible.
Claims (5)
1. a production method for square fused quartz ceramic crucible, its raw material used is: the diameter of SiO2 content more than 99.9% is the melting obtuse angle quartz sand of 0.075mm-1.5mm; It is characterized in that:
(1) by quantitative SiO2 content more than 99.9%, diameter is that the melting obtuse angle quartz sand of 0.075mm-1.5mm sends into forming graphite mould under vacuum conditions, by the method for vibrations to reduce the space between quartz sand particle, the vibrations time is 15-20 minute;
(2) forming graphite mould is sent into electric arc furnace under vacuum conditions, in electric arc furnace, be heated to 1850-1870 DEG C, stop heating after making quartz sand all be in molten state, naturally cooling shifts out electric arc furnace after being cooled to normal temperature, sloughs forming graphite mould;
(3) shaping crucible high pressure water is carried out cleaning showers totally naturally to dry afterwards;
(4) crucible dried is sent into kiln and start heat temperature raising, first after sintering temperature is risen to 400 DEG C from 0 DEG C by the time of 2-3 hour slowly, in 1 hours, sintering temperature is risen to 1150-1200 DEG C from 400 DEG C fast again, stop heating after maintaining this temperature 26-28 hour, after being progressively cooled to normal temperature, obtain square fused quartz ceramic roller crucible.
2. the production method of a kind of square fused quartz ceramic crucible according to claim 1, the feature of its step (2) is: described is 1860 DEG C by the temperature of electric arc furnace heating under vacuum conditions.
3. the production method of a kind of square fused quartz ceramic crucible according to claim 1, the feature of its step (4) is: the sintering temperature in described kiln is 1175 DEG C, and the total time of sintering is 27 hours.
4. the production method of a kind of square fused quartz ceramic crucible according to claim 1, the feature of its step (4) is: described kiln is coal gas generation shuttle kiln.
5. the purposes of square fused quartz ceramic crucible is: as the ingot casting link at polysilicon, serves as polysilicon material and long brilliant container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190808.0A CN105084875A (en) | 2014-05-08 | 2014-05-08 | Production method for square fused quartz ceramic crucible |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410190808.0A CN105084875A (en) | 2014-05-08 | 2014-05-08 | Production method for square fused quartz ceramic crucible |
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| CN105084875A true CN105084875A (en) | 2015-11-25 |
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| CN201410190808.0A Pending CN105084875A (en) | 2014-05-08 | 2014-05-08 | Production method for square fused quartz ceramic crucible |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108841A (en) * | 2021-03-23 | 2022-09-27 | 新沂市中鑫光电科技有限公司 | Heat treatment method for high-strength quartz crucible |
| CN116947467A (en) * | 2023-05-22 | 2023-10-27 | 江苏君航高新材料科技有限公司 | Sintering method of high-purity fused quartz ceramic roller |
-
2014
- 2014-05-08 CN CN201410190808.0A patent/CN105084875A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108841A (en) * | 2021-03-23 | 2022-09-27 | 新沂市中鑫光电科技有限公司 | Heat treatment method for high-strength quartz crucible |
| CN116947467A (en) * | 2023-05-22 | 2023-10-27 | 江苏君航高新材料科技有限公司 | Sintering method of high-purity fused quartz ceramic roller |
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Application publication date: 20151125 |