CN102101777A - Process method for preparing ceramic tube by vertical pure sintering - Google Patents
Process method for preparing ceramic tube by vertical pure sintering Download PDFInfo
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- CN102101777A CN102101777A CN2009102015424A CN200910201542A CN102101777A CN 102101777 A CN102101777 A CN 102101777A CN 2009102015424 A CN2009102015424 A CN 2009102015424A CN 200910201542 A CN200910201542 A CN 200910201542A CN 102101777 A CN102101777 A CN 102101777A
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Abstract
The invention discloses a process method for preparing a ceramic tube by vertical pure sintering, which comprises: vertically suspending a ceramic blank tube to be sintered in a tubular crucible, wherein the crucible is made of a magnesium oxide refractory material or recrystallized silicon carbide refractory material, and the ceramic blank tube is not contacted with the inner wall of the crucible; and placing the crucible as well as the ceramic blank tube in a high-temperature kiln for sintering and thus, obtaining the ceramic tube. In the invention, the ceramic blank tube is vertically suspended in the crucible made of the magnesium oxide refractory material or recrystallized silicon carbide refractory material to be sintered so as not to deform under the action of an external force, the magnesium oxide refractory material or recrystallized silicon carbide refractory material, which has high heat conducting performance, can create a uniform-temperature sintering environment which helps to ensure the strict requirement of the special ceramic tube on temperature range during sintering; and the tubular crucible can give play to various advantages and functions as a supporting tube, an atmosphere closed holding tube and a temperature equalizing tube. For ceramic tubes with specific atmosphere requirement during sintering, the process method also can realize specific atmospheres in a simple and effective mode.
Description
Technical field
The present invention relates to the method for cooking of vitrified pipe, be specifically related to method for cooking as special cermacis pipes such as zirconia ceramics pipe, beta-alumina dielectric ceramics pipe, BCFN oxygen permeable film media ceramic pipes.
Background technology
Along with technology and rapid development of economy, the vitrified pipe goods of some special functional application such as zirconia ceramics pipe, sodium-sulfur cell are increasing with the market requirement of required BCFN (the extraordinary polycrystalline compounds of a kind of synthetic) oxygen permeable film media ceramic pipe of beta-alumina dielectric ceramics pipe, coke-oven gas byproduct hydrogen through reforming oxidized device or the like.
The popular feature that these special cermacis pipe sintering are made, the one, carry out sintering about requirement hot environment to 1600 ℃; The 2nd, requirement hot environment atmosphere cleaning (special atmosphere that adapts as cleaned air, oxygen-rich air or with its matrix or the like); The 3rd, the temperature band of densified sintering product is narrower, as requires temperature range at TS ± (5～10 ℃), and TS is the standard value of sintering temperature, exceeds this temperature range and may cause sintering deficiency or sintering excessive; The 4th, adopt existing lying low when placing sintering process, because of its vertically with laterally all can shrink, the reason of in addition conducting oneself with dignity can cause the bending of vitrified pipe finished product, become critical defect such as flat.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of in high temperature kiln sintering prepare the processing method of vitrified pipe, the temperature difference is big in the prior art kiln, vitrified pipe is yielding and be difficult to keep defectives such as a certain particular atmosphere to overcome.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of vertical clean sintering prepares the processing method of vitrified pipe, with biscuit of ceramics pipe vertical suspension to be sintered in a piped crucible, described crucible is made by mgo refractory or recrystallized silicon carbide refractory materials, the biscuit of ceramics pipe does not contact with the inwall of crucible, place high temperature kiln to carry out sintering together with the biscuit of ceramics pipe in above-mentioned crucible, make described vitrified pipe.
Preferably, in the plush copper of the prefabricated diameter in described biscuit of ceramics pipe to be sintered upper end greater than the crucible internal diameter, the biscuit of ceramics pipe inserts in the crucible, described plush copper is located in the upper edge of crucible, make biscuit of ceramics pipe vertical suspension in crucible, after burned the coming out of the stove, described plush copper is removed.
Preferably, at the hydraucone of the prefabricated diameter in described biscuit of ceramics pipe to be sintered upper end greater than the crucible internal diameter, a collar is placed in upper edge at crucible, the described collar and the same material of biscuit of ceramics pipe to be sintered, the biscuit of ceramics pipe inserts in the crucible, and described hydraucone matches with the collar, makes biscuit of ceramics pipe vertical suspension in crucible, after burned the coming out of the stove, described hydraucone is removed.
Further, described bell-mouthed opening angle is 35 ° ~ 45 °
Preferably, default a pair of on the same straight line in described biscuit of ceramics pipe to be sintered upper end along diametric through hole, insert a rod pin of making by refractory materials in the through hole as hanging rod, the biscuit of ceramics pipe inserts in the crucible, described two ends of hanging rod ride over the upper edge of crucible, make biscuit of ceramics pipe vertical suspension in crucible, after burned the coming out of the stove, the vitrified pipe upper end is had one section removal of through hole.
Further, the lower end of described crucible is provided with at the bottom of the crucible, leaves the space between at the bottom of the lower end of biscuit of ceramics pipe and the crucible, places the atmosphere volatile matter in the described space; Be stamped crucible lid above the crucible, the biscuit of ceramics pipe is completely enclosed within the cavity that crucible and crucible lid surround, crucible covers also to be made by mgo refractory or recrystallized silicon carbide refractory materials.
The invention has the beneficial effects as follows: biscuit of ceramics pipe vertical suspension is carried out sintering in a mgo refractory or recrystallized silicon carbide refractory crucible, can not be subjected to the external force effect and horizontal similar bending takes place, become distortion such as flat, because mgo refractory or recrystallized silicon carbide refractory materials have good heat conductivility, can build the sintering environment of a samming in crucible inside, when helping guaranteeing special cermacis pipe sintering to the harsh requirement of temperature range; Because the still bigger advantage of thermal conductivity when mgo refractory or recrystallized silicon carbide refractory materials have pyrochemistry stable performance, refractoriness under load high (being higher than 1750 ℃), self refractoriness high (being higher than 2000 ℃), high temperature, can bring into play it as supporting tube, the airtight holding tube of atmosphere and as the multiple advantage and the effect of samming pipe.The vitrified pipe that has particular atmosphere to require during for sintering, the present invention also can realize particular atmosphere with simple and effective way.Experiment showed, that the present invention not only can burn out satisfactory special cermacis pipe, and cost is also lower.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is a kind of synoptic diagram of firing state of biscuit of ceramics pipe among the present invention.
Fig. 2 is the synoptic diagram of the another kind of hang of biscuit of ceramics pipe in crucible among the present invention.
Fig. 3 is the synoptic diagram that biscuit of ceramics pipe another kind is fired state among the present invention.
Fig. 4 is the shape synoptic diagram of a kind of biscuit of ceramics pipe among the present invention.
Fig. 5 is the synoptic diagram of the collar that matches with biscuit of ceramics pipe shown in Figure 4.
Embodiment
As shown in Figure 1, the processing method that a kind of vertical clean sintering of the present invention prepares vitrified pipe is the prefabricated plush copper 11 in the upper end of biscuit of ceramics pipe 1 to be sintered; Then biscuit of ceramics pipe to be sintered 1 is inserted in the piped crucible 2, biscuit of ceramics pipe 1 does not contact with the inwall of crucible 2, because the diameter of plush copper 11 is greater than the internal diameter of crucible 2, therefore plush copper 11 just is located in the upper edge of crucible 2, make biscuit of ceramics pipe 1 vertical suspension in crucible 2, crucible 2 is made by mgo refractory or recrystallized silicon carbide refractory materials; Above-mentioned crucible 2 is placed at the bottom of the kiln on the inner plane 3 together with biscuit of ceramics pipe 1, in high temperature kiln, carry out sintering, can make vitrified pipe.After burned the coming out of the stove, plush copper 11 amputated get final product.
In the above-described embodiments, be provided with a plush copper 11 be for biscuit of ceramics pipe to be sintered freely vertical suspension in crucible 2.Obviously, can also adopt alternate manner that the biscuit of ceramics pipe is suspended in the crucible 2, such as mode as shown in Figure 2, default a pair of in biscuit of ceramics pipe 1 upper end to be sintered along diametric through hole, insert a rod pin of making by mgo refractory or recrystallized silicon carbide refractory materials in the through hole as hanging rod 7, then biscuit of ceramics pipe 1 is inserted in the crucible 2, the two ends of hanging rod 7 ride over the upper edge of crucible 2, make biscuit of ceramics pipe vertical suspension in crucible, after burned the coming out of the stove, vitrified pipe 1 upper end is had a section of through hole amputate and get final product.The central position of through hole is to be desirable range of choice from biscuit of ceramics pipe upper surface 25～35mm, through-hole diameter 4～6mm, and the diameter that hangs rod 7 is more satisfactory than the little 0.2mm of through-hole diameter.
Shown in Figure 3 is another kind of embodiment of the present invention, at the hydraucone 12 of the prefabricated diameter in biscuit of ceramics pipe 1 upper end to be sintered greater than the crucible internal diameter, places a collar 5 in the upper edge of crucible 2, the collar 5 and biscuit of ceramics pipe 1 same material to be sintered; The lower end of crucible 2 is provided with at the bottom of the crucible 22, leaves the space between 22 at the bottom of the lower end of biscuit of ceramics pipe 1 and the crucible, places atmosphere volatile matter 6 in this space; Then, biscuit of ceramics pipe 1 is inserted in the crucible 2, hydraucone 12 matches with the collar 5, make biscuit of ceramics pipe 1 vertical suspension in crucible 2, place, the upper edge design of crucible 2 has shoulder along 21 (being upper edge hole thickening design), be stamped a crucible lid 4 above the crucible 2, biscuit of ceramics pipe 1 be completely enclosed within crucible 2 cover in 4 cavitys that surround with crucible, crucible lid 4 is also made by mgo refractory or recrystallized silicon carbide refractory materials; Then, put into high temperature kiln and carry out sintering, in sintering process, atmosphere volatile matter 6 can be built needed specific sintering atmosphere around biscuit of ceramics pipe 1; Crucible 2 can produce particular atmosphere with 4 one of the common formation of crucible lid, and the device of this particular atmosphere of airtight relatively maintenance and samming; After burned the coming out of the stove, hydraucone 12 removals are got final product.
This embodiment has following outstanding beneficial effect:
1, hangs biscuit of ceramics pipe 1 by the biscuit of ceramics collar 5 with material.Utilize same material in high-temperature sintering process, to have identical linear shrinkage behavioral trait, can prevent effectively that biscuit of ceramics pipe hanging head from shrinking downslide, guarantee that the biscuit of ceramics pipe all is in the vertical hanging state in whole sintering process, guarantee the linearity that it is sintering finished.
2, adopt piped mgo refractory or recrystallized silicon carbide refractory crucible 2.Utilize mgo refractory or the stable performance of recrystallized silicon carbide refractory materials pyrochemistry, refractoriness under load high (being higher than 1750 ℃), self refractoriness high (being higher than 2000 ℃), the still bigger advantage of thermal conductivity during high temperature can be brought into play it as supporting tube, the airtight holding tube of atmosphere and as the multiple advantage and the effect of samming pipe.
3, the tubulose crucible 2 of Cai Yonging can be according to the length of pipe to be sintered, is spliced by the short tube intussusception in the corresponding negative and positive of multistage band rim of the mouth; Also can make multistage multi-cavity chamber, cover builds up the stay pipe structure of multi-cavity chamber, satisfies the needs of many vitrified pipes of the each sintering of large-scale kiln, improves production capacity greatly.
4, filling in crucible 2 (bulk storage) particular atmosphere volatile matter 6 is simple and practical with the method that produces particular atmosphere, can satisfy specific sintering atmosphere requirement efficiently, at low cost.
5, the hydraucone design is adopted in biscuit of ceramics pipe upper end, makes the biscuit of ceramics pipe be in free holding state in sintering process, causes bending in the time of can not shrinking because of sintering, becomes defective such as flat.The opening angle of hydraucone 12 is desirable range of choice with 35 ° ~ 45 °, as shown in Figure 4, specifically according to factor adjustment such as vitrified pipe caliber, pipe range, material density, wall thickness (or overall deadweight) and sintering shrinkage sizes, the endoporus of the collar 5 also is provided with the opening angle identical with hydraucone 12, as shown in Figure 5.
Claims (6)
1. a vertical clean sintering prepares the processing method of vitrified pipe, it is characterized in that: with biscuit of ceramics pipe vertical suspension to be sintered in a piped crucible, described crucible is made by mgo refractory or recrystallized silicon carbide refractory materials, the biscuit of ceramics pipe does not contact with the inwall of crucible, place high temperature kiln to carry out sintering together with the biscuit of ceramics pipe in above-mentioned crucible, make described vitrified pipe.
2. processing method according to claim 1, it is characterized in that: in the plush copper of the prefabricated diameter in described biscuit of ceramics pipe to be sintered upper end greater than the crucible internal diameter, the biscuit of ceramics pipe inserts in the crucible, described plush copper is located in the upper edge of crucible, make biscuit of ceramics pipe vertical suspension in crucible, after burned the coming out of the stove, described plush copper is removed.
3. processing method according to claim 1, it is characterized in that: at the hydraucone of the prefabricated diameter in described biscuit of ceramics pipe to be sintered upper end greater than the crucible internal diameter, a collar is placed in upper edge at crucible, the described collar and the same material of biscuit of ceramics pipe to be sintered, the biscuit of ceramics pipe inserts in the crucible, and described hydraucone matches with the collar, makes biscuit of ceramics pipe vertical suspension in crucible, after burned the coming out of the stove, described hydraucone is removed.
4. processing method according to claim 3 is characterized in that: described bell-mouthed opening angle is 35 ° ~ 45 °.
5. processing method according to claim 1, it is characterized in that: default a pair of along diametric through hole in described biscuit of ceramics pipe to be sintered upper end, insert a rod pin of making by refractory materials in the through hole as hanging rod, the biscuit of ceramics pipe inserts in the crucible, described two ends of hanging rod ride over the upper edge of crucible, make biscuit of ceramics pipe vertical suspension in crucible, after burned the coming out of the stove, the vitrified pipe upper end is had one section removal of through hole.
6. according to each described processing method of claim 1-5, it is characterized in that: the lower end of described crucible is provided with at the bottom of the crucible, leaves the space between at the bottom of the lower end of biscuit of ceramics pipe and the crucible, places the atmosphere volatile matter in the described space; Be stamped crucible lid above the crucible, the biscuit of ceramics pipe is completely enclosed within the cavity that crucible and crucible lid surround, crucible covers also to be made by mgo refractory or recrystallized silicon carbide refractory materials.
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| CN2009102015424A CN102101777A (en) | 2009-12-21 | 2009-12-21 | Process method for preparing ceramic tube by vertical pure sintering |
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| CN2009102015424A CN102101777A (en) | 2009-12-21 | 2009-12-21 | Process method for preparing ceramic tube by vertical pure sintering |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538451A (en) * | 2011-12-22 | 2012-07-04 | 上海泛联科技股份有限公司 | Sintering device and method for preparing long-tube shaped structural ceramic continuously |
| CN103123221A (en) * | 2012-12-12 | 2013-05-29 | 上海电气钠硫储能技术有限公司 | Device used for sintering sodium-sulfur battery ceramic pipes |
| CN103499204A (en) * | 2013-10-17 | 2014-01-08 | 上海电气钠硫储能技术有限公司 | Sodium-sulfur battery electrolyte thin-wall ceramic tube sintering tool |
| CN105753458A (en) * | 2016-03-07 | 2016-07-13 | 宁波泰格尔陶瓷有限公司 | Vertical clean sintering process for preparing alumina ceramic tube |
| US20160375607A1 (en) * | 2015-06-29 | 2016-12-29 | Corning Incorporated | Manufacturing line, process, and sintered article |
| US10486332B2 (en) | 2015-06-29 | 2019-11-26 | Corning Incorporated | Manufacturing system, process, article, and furnace |
| US11629915B2 (en) | 2015-06-29 | 2023-04-18 | Corning Incorporated | Method of manufacturing ceramic tape |
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2009
- 2009-12-21 CN CN2009102015424A patent/CN102101777A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538451A (en) * | 2011-12-22 | 2012-07-04 | 上海泛联科技股份有限公司 | Sintering device and method for preparing long-tube shaped structural ceramic continuously |
| CN103123221A (en) * | 2012-12-12 | 2013-05-29 | 上海电气钠硫储能技术有限公司 | Device used for sintering sodium-sulfur battery ceramic pipes |
| CN103123221B (en) * | 2012-12-12 | 2015-08-05 | 上海电气钠硫储能技术有限公司 | A kind of device for sodium-sulphur battery earthenware sintering |
| CN103499204A (en) * | 2013-10-17 | 2014-01-08 | 上海电气钠硫储能技术有限公司 | Sodium-sulfur battery electrolyte thin-wall ceramic tube sintering tool |
| US11577427B2 (en) | 2015-06-29 | 2023-02-14 | Corning Incorporated | Manufacturing system, process, article, and furnace |
| US11351697B2 (en) | 2015-06-29 | 2022-06-07 | Corning Incorporated | Manufacturing system, process, article, and furnace |
| US10486332B2 (en) | 2015-06-29 | 2019-11-26 | Corning Incorporated | Manufacturing system, process, article, and furnace |
| US10766165B2 (en) * | 2015-06-29 | 2020-09-08 | Corning Incorporated | Manufacturing line, process, and sintered article |
| US10875212B2 (en) | 2015-06-29 | 2020-12-29 | Corning Incorporated | Manufacturing line, process, and sintered article |
| US10967539B2 (en) | 2015-06-29 | 2021-04-06 | Corning Incorporated | Manufacturing line, process, and sintered article |
| US11148321B2 (en) | 2015-06-29 | 2021-10-19 | Corning Incorporated | Polycrystalline waveguide |
| US20160375607A1 (en) * | 2015-06-29 | 2016-12-29 | Corning Incorporated | Manufacturing line, process, and sintered article |
| US11953264B2 (en) | 2015-06-29 | 2024-04-09 | Corning Incorporated | Manufacturing line, process, and sintered article |
| US11629915B2 (en) | 2015-06-29 | 2023-04-18 | Corning Incorporated | Method of manufacturing ceramic tape |
| US11745385B2 (en) | 2015-06-29 | 2023-09-05 | Corning Incorporated | Manufacturing system, process, article, and furnace |
| US11768032B2 (en) | 2015-06-29 | 2023-09-26 | Corning Incorporated | Method of manufacturing ceramic tape |
| US11919196B2 (en) | 2015-06-29 | 2024-03-05 | Corning Incorporated | Manufacturing system, process, article, and furnace |
| CN105753458A (en) * | 2016-03-07 | 2016-07-13 | 宁波泰格尔陶瓷有限公司 | Vertical clean sintering process for preparing alumina ceramic tube |
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Application publication date: 20110622 |