CN1019294B - 双层耐火板 - Google Patents
双层耐火板Info
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- CN1019294B CN1019294B CN88101391A CN88101391A CN1019294B CN 1019294 B CN1019294 B CN 1019294B CN 88101391 A CN88101391 A CN 88101391A CN 88101391 A CN88101391 A CN 88101391A CN 1019294 B CN1019294 B CN 1019294B
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- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/12—Travelling or movable supports or containers for the charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
本发明提供了一种双层耐火板,包括一个抗裂衬底及嵌于其上的颗粒状表层。本双层耐火板适用于在温度起伏的窑炉中作搁板,可以避免由于材料受热膨胀不同而产生的破裂。
Description
本发明为一种耐火板,应用于耐火材料、细瓷、瓷器及陶瓷电子部件等产品的烧制生产。
目前在上述产品的烧制过程中,一般广泛使用一种称之为烘烧台或搁板的模砖(下文统称之为搁板)。
该搁板必需具有如下特性:
1.与产品无任何反应;
2.能反复使用,具有高度抗裂性(此优点在于节省费用);
3.不变形;
4.具有高热效率,等
因此,需要选择出一种同烧制产品的性能相匹配的搁板材料。目前作为搁板的主要材料有三氧化二铝-二氧化硅,三氧化二铝,二氧化锆等氧化物,和非氧化物,如碳化硅。然而,没有一种材料能具备上述所有特性。
用三氧化二铝-二氧化硅制作的搁板的使用有所局限,因为它可能与产品进行反应,而且在烧成过程中容易变形。用三氧化二铝制作的搁板,必需高温烧制,费用昂贵,并且它也会与部分产生进行反应。
用二氧化锆搁板与产品无反应,也不会变形,但它也有一定的缺陷,如因为其比重大,人们难于操作,价格高昂,而且其导热性能差,因为二氧化锆发生变化,导致搁板变脆,多次使用后易破裂。
用碳化硅Sic作搁板,可抗变形。但它表面必须要涂有昂贵的涂料,以避免氧化,老化及同产品发生反应。
为了解决上述问题,在制作三氧化二铝搁板时,生产出一种三层搁板,在两层三氧化二铝板之间加上一层具有高度蠕变阻力的碳硅化合物。
然而三层搁板成本昂贵,并且难于制成均匀的三层。而且,反复使用后,层与层之间会出现象表面脱落一样的破裂情况,所以并不能有效地解决上述问题。
日本实用新型公开号61-192300)1986)揭露的是另一种常用方法,它是一种陶瓷板衬的耐火容器,用0.1至0.5毫米厚的陶瓷板通过挤压或粘贴,贴在单层或双层的耐火容器的内表面或背表面上,再通过烧制使其结为一体。
然而,这种陶瓷板的制作采用了造纸的方法。如果在耐火容器中使用未经烧制的陶瓷板,在接近烧成温度下,它将至少缩小15%,并出现裂纹。所以在耐火容器中很难使用这种陶瓷板。
同样,如果使用烧制的坚硬材料,很难将其合适地镶嵌在耐火容器上作为衬垫。即使安装得很合适,在烧成温度下,经过反复使用,也会在陶瓷板和耐火容器之间产生破裂或脱落,因为两者热膨胀程度
不同。
所以,这种板料在温度反复变化的条件下难以用作搁板。
本发明系一个双层耐火板,它由粒状表层部分和一个衬底组成。
这种双层耐火板主要作为搁板用于烘炉内,适于各种温度。为了克服传流双层耐火板的一个缺陷,即由于表面和衬底热膨胀程度不同而产生的表面破裂和脱落,本发明产品成功地在耐火衬底上安置了一种颗粒表层结构。这样,颗粒间的空隙吸收了由于两种材料本身不同在颗粒表面和衬底之间产生的受热膨胀差异,避免了脱落与破裂等。
附图说明:
图1为发明的双层耐火板的截面图,1为衬底,2为颗粒状表面。
用于本发明耐火衬底的材料不限,只要这些材料对燃料炉的温度变化能保持稳定,并能抗裂,防止变形,具有高度的导热性,具有与粒状表层相似的线膨胀系数。作为衬底的材料例如有氧化镁,尖晶石(MgO·Al2O3),富铝红柱石(莫来石)、二氧化锆(如:天然斜锆石、用氧化镁、氧化钙、三氧化二钇稳定的合成氧化锆);锆石;碳化硅、耐火泥、堇青石等。在这些材料当中,氧化镁-尖晶石和氧化镁-尖晶石-二氧化锆耐火衬底更为适用,因为它们具有较强的耐久性。
本发明双层耐火板的衬底并不直接同烧成制品发生接触,因此不必惧怕衬底同产品发生反应。作为衬底材料的纯度并不特别受限
制,只要颗粒能嵌在未经处理的衬底上即可。
在本发明的双层耐火板的颗粒状表层是烧成过程中直接同产品接触的部分,所以考虑到同产品发生反应等的可能必须使用高纯度材料。
尽管颗粒表层材料的选择取决于要烧制的产品材料,但可用下述材料:二氧化锆(如天然斜锆石,用氧化镁、氧化钙、三氧化二钇稳定的合成氧化锆)、硅石、氧化铝、氧化镁、尖晶石、碳化硅、氮化硅、碳等。根据将要烧制的产品的特性,可以采用上述一种或一种以上的材料,颗粒状表层即由上述材料的颗粒组合而成。
颗粒有自己大小系列,由精细粉粒到粗糙颗粒不等。根据生产双层耐火板时的烧成温度,同衬底的粘着力,炉温,与产品的反应作用,产品的形状及大小,较好的是使用0.1至2毫米的颗粒。如果颗粒大小在此范围之内,其粘着部分的厚度小,因此,在颗粒同衬底间因受热膨胀程度不同而产生的张力很容易被吸收掉。其结合力的减弱很小,在颗粒和衬底之间未发现有脱落现象。
图1清楚地显示了本发明的双层耐火板截面,颗粒(2)的部分镶嵌在衬底(1)上,颗粒状表面由一层颗粒(2)构成,这些颗粒成线型置于衬底(1)之上。
具有如此结构的颗粒状表层部分能用各种生产耐火材料的方法生产。例如,用一定形状的衬底生坯,其柔软程度要利于颗粒镶接,在它上面均匀地覆盖一层上述颗粒,令其结合一体,这样的衬底生坯
加上了颗粒状表层,经过烧制,制成了本发明的双层耐火板。
烧制温度及时间并没有很大的限制性,可根据衬底材料,颗粒及其大小而变化。
然而其烧制温度必须高于烧炉的工作温度,一般在摄氏1000-1600℃之间。
其烧制温度也不能超过使其颗粒状表层部分上的全部颗粒溶化,变成玻璃质的稠密层的温度。正是由于颗粒表层上颗粒间的空隙,才取得了本发明的双层耐火板所具有的功能和效果。一旦其全部颗粒熔化,变成玻璃质的稠密层,就将会出现同传统双层耐火板一样的缺点。但是,即使局部的颗粒溶解、稠化,只要其它颗粒间的空隙依旧存在,仍可避免破裂、脱落。更为理想的是最好每个颗粒都单独立在衬底上,每个颗粒因所用材料的种类、大小相异,其熔点也不同。
通过使用大小一致的颗粒,可避免其熔化致密。因为,如果构成颗粒表层的颗粒大小不均,小颗粒夹在大颗粒间的缝隙之中,可在较低的温度熔化,塞满空隙,使颗粒表层结构稠化。
根据所需用途,本发明的双层耐火板可使用多种材料组合,作为衬底层材料和颗粒表层材料。因此,本发明在成本上也具有很多优点。例如,传统的铝板要用约1800℃高温烧制以改善抗蠕变力,而本发明由于只用氧化铝作为颗粒表层材料,用具有高度抗蠕变力的莫来石作衬底,可使烧制温度降至1600℃,板生产成本因此而降低。
下面将用实例说明本发明产品。
实例:
本发明产品样品的制作是在一个正方形的规格为150×150×10mm的金属模盘上加入具有表1特性的颗粒,使其成水平层。再在上述的颗粒层上加入具有表1特性的混配好的化合物作为衬底。通过单轴挤压、脱模,在摄氏1500度的温度下烧制该生陶坯。
(1)以下为实例和对比例的化学成份:
氧化锆:ZrO295%(重)(氧化钙稳定的)
氧化镁:MgO99.5%(重)
尖晶石:MgO28.9%(重)Al2O369.9%(重)
氧化铝:用在衬底:Al2O390%(重)
用在单板(对比):Al2O390%(重)
用在颗粒表层:Al2O399%(重)
莫来石:Al2O372.8%(重)
SiO227.2%(重)
碳化硅:SiC98%
锆石:ZrO267%(重)
SiO232%(重)
镁铬尖晶石:MgO占重量的81%
Cr2O3占重量的18.5%
氧化铬:Cr2O3占重量的99%
(2)混合比例:
例2:氧化镁-二氧化锆,重量比例1∶1
例3:氧化镁-尖晶石-二氧化锆,重量比例为10∶5∶1
例4:氧化铝-莫来石,重量比例1∶1
氧化铝-尖晶石,重量比例1∶2
例5:氧化镁-尖晶石-锆石,重量比例3∶1∶1
氧化镁-尖晶石,重量比例1∶1
在表1中,例1至例5展示了本发明的双层耐火板。在各实例之中,例1-例3显示了特别良好的抗反应、抗破裂、热效应等特点,作为衬底他们具有抗破裂性、抗蠕变性以及良好的热效应,作为颗粒表层则是良好的抗反应材料。
例4与例5也表明了良好结果,由于衬底使用了普通材料,价格也适中。
而对比1到对比3得到的是传统产品。对比1由两种材料制成,一个为抗破裂的尖晶石用作衬底,另一个为约5mm厚的具有抗反应能力的氧化锆板。这样制成了比较轻的耐火搁板。但因两种材料受热膨胀不同,其抗破裂性能较差。
本发明提供了一双层耐火板,它包括一个抗破裂的衬底和一个抗反应的颗粒状表层。因此,本发明具有同时既防破裂又防反应的性能。这一特性单层耐火板是不具备的。本发明也提供了一种制备耐火板的改进方法,与由氧化锆制成的单层耐火板相比,该板重量更轻,所以热效应高,工作性也好。
Claims (1)
1、一种双层耐火板,其中包括:由至少一种选自下列物质的材料所形成的衬底,这类物质包括氧化镁、尖晶石、富铝红柱石、二氧化锆、锆石、氧化铝、耐火泥、堇青石、碳化硅,衬底上具有由粒径为0.1-2mm的耐火材料颗粒构成的粒状表面,这些颗粒彼此分离,从而在颗粒间产生缝隙,所述颗粒至少被部分地埋入所述衬底之中,它们选自氧化镁、尖晶石、二氧化锆、氧化铝、二氧化硅、氧化锆、碳化硅、氮化硅、碳及其铬铁矿。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62058740A JPH0628947B2 (ja) | 1987-03-16 | 1987-03-16 | 道具れんが用二層構造耐熱板 |
JP58740/87 | 1987-03-16 |
Publications (2)
Publication Number | Publication Date |
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CN88101391A CN88101391A (zh) | 1988-10-05 |
CN1019294B true CN1019294B (zh) | 1992-12-02 |
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN88101391A Expired CN1019294B (zh) | 1987-03-16 | 1988-03-16 | 双层耐火板 |
Country Status (7)
Country | Link |
---|---|
US (1) | US4906509A (zh) |
JP (1) | JPH0628947B2 (zh) |
KR (1) | KR900003087B1 (zh) |
CN (1) | CN1019294B (zh) |
DE (1) | DE3808809A1 (zh) |
FR (1) | FR2612511B1 (zh) |
GB (1) | GB2202927B (zh) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2635375B1 (fr) * | 1988-07-21 | 1994-03-18 | Tokyo Kokyu Rozai Co Ltd | Support d'enfournement et son procede de fabrication, pour la cuisson de ceramiques |
DE8910674U1 (de) * | 1989-09-07 | 1989-10-19 | Carborundum Resistant Materials GmbH, 4000 Düsseldorf | Wärmedämmplatte |
JPH0647499B2 (ja) * | 1990-03-28 | 1994-06-22 | 日本碍子株式会社 | セラミックス製品の焼成方法 |
JP2976209B2 (ja) * | 1990-08-23 | 1999-11-10 | 東海カーボン株式会社 | カーボンブラック製造炉 |
US5529732A (en) * | 1993-02-02 | 1996-06-25 | Ngk Insulators, Ltd. | Underlying boards for firing and a method for firing ceramic moldings by using such underlying boards |
EP0639436B1 (en) * | 1993-02-02 | 2002-07-17 | Ngk Insulators, Ltd. | Planking for firing and method of firing ceramic products by using the same |
US5603875A (en) * | 1993-06-11 | 1997-02-18 | Aerospace Coating Systems, Inc. | Method for producing ceramic-based components |
DE4334683C2 (de) * | 1993-10-12 | 1996-10-31 | Ulbricht Joachim Doz Dr Ing Ha | Verfahren zur Herstellung von Feuerfestzusammensetzungen |
DE4436823C1 (de) * | 1994-10-14 | 1996-05-02 | Haldenwanger Tech Keramik Gmbh | Tragkörper aus SiC und dessen Verwendung |
DE19543430C2 (de) * | 1995-11-22 | 1999-05-12 | Vgt Industriekeramik Gmbh | Zweischichtstein und Verfahren zu seiner Herstellung |
DE19606007C2 (de) * | 1996-02-17 | 1999-10-21 | Fosbel Gmbh | Verfahren zum Herstellen einer feuerfesten Auskleidung für Öfen und Behälter |
EP1184637A1 (en) * | 2000-08-28 | 2002-03-06 | Mino Yogyo Co., Ltd. | Firing setters and process for producing these setters |
DE50111316D1 (de) * | 2001-08-28 | 2006-12-07 | Siemens Ag | Hitzeschildstein sowie Verwendung eines Hitzeschildsteins in einer Brennkammer |
DE102004056879B4 (de) * | 2004-10-27 | 2008-12-04 | Curamik Electronics Gmbh | Verfahren zum Herstellen eines Metall-Keramik-Substrates |
WO2010107678A1 (en) * | 2009-03-20 | 2010-09-23 | 3M Innovative Properties Company | Sintering support and methods |
JP5005100B1 (ja) * | 2011-03-30 | 2012-08-22 | 東京窯業株式会社 | リチウムイオン電池用正極活物質用熱処理容器およびその製造方法 |
CN110498669A (zh) * | 2019-07-31 | 2019-11-26 | 辽宁科技大学 | 一种利用废弃镁碳砖制备方镁石质匣钵的方法 |
CN112062584B (zh) * | 2020-09-18 | 2022-06-10 | 山东鲁阳浩特高技术纤维有限公司 | 一种复合耐火材料及其制备方法 |
CN112430106B (zh) * | 2020-11-30 | 2022-09-20 | 娄底市安地亚斯电子陶瓷有限公司 | 一种用于陶瓷烧结的承载体及其制备方法 |
CN112390655A (zh) * | 2020-12-04 | 2021-02-23 | 强安厨房科技(南通)有限公司 | 一种窖炉石板 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB203062A (en) * | 1922-06-06 | 1923-09-06 | Eduard Bong | A method of forming the refractory lining of furnaces, converters & the like |
GB238407A (en) * | 1924-10-09 | 1925-08-20 | Guy Vincent Evers | Improvements relating to cement kilns |
US2327972A (en) * | 1939-01-17 | 1943-08-24 | Lapp Insulator Company Inc | High strength ceramic surface |
GB726640A (en) * | 1953-09-28 | 1955-03-23 | Norton Grinding Wheel Co Ltd | Process of manufacturing batts and saggers and like firing supports |
GB1107454A (en) * | 1964-06-22 | 1968-03-27 | Sandvikens Jernverks Ab | Improvements in or relating to bottom bricks or plugs for ingot moulds |
GB1392227A (en) * | 1971-06-29 | 1975-04-30 | Carborundum Co | Refractory bodies and method of making same |
GB1477632A (en) * | 1973-08-16 | 1977-06-22 | Foseco Int | Containers for molten metal |
US4055451A (en) * | 1973-08-31 | 1977-10-25 | Alan Gray Cockbain | Composite materials |
DE2615537C2 (de) * | 1976-04-09 | 1978-05-11 | Didier-Werke Ag, 6200 Wiesbaden | Verfahren zur Herstellung einer Schieberplatte für den Schieberverschluß an der Ausgußöffnung flüssige Schmelze enthaltender metallurgischer Behälter |
JPS5324308A (en) * | 1976-08-19 | 1978-03-07 | Tigers Polymer | Manufacture of ceramics |
JPS54123109A (en) * | 1978-03-17 | 1979-09-25 | Kurosaki Refractories Co | Secondary particle complex body and production thereof |
JPS57156870A (en) * | 1981-03-23 | 1982-09-28 | Harima Refract Co Ltd | Spraying method of refractory body |
DE3306423A1 (de) * | 1983-02-24 | 1984-08-30 | Didier-Werke Ag, 6200 Wiesbaden | Ungebranntes feuerfestes bauteil in form einer platte fuer die verlorene auskleidung von metallurgischen gefaessen |
JPS61209108A (ja) * | 1985-03-12 | 1986-09-17 | 日本磁力選鉱株式会社 | 滑り止めを施した焼成物の製造方法 |
JPS6237683A (ja) * | 1985-08-09 | 1987-02-18 | 東芝セラミツクス株式会社 | セラミツク焼成用道具 |
AU601650B2 (en) * | 1987-12-09 | 1990-09-13 | Swiss Aluminium Ltd. | Method for coating a portion of the surface of a porous ceramic body |
JPH038749U (zh) * | 1989-06-13 | 1991-01-28 |
-
1987
- 1987-03-16 JP JP62058740A patent/JPH0628947B2/ja not_active Expired - Lifetime
-
1988
- 1988-03-14 US US07/167,727 patent/US4906509A/en not_active Expired - Fee Related
- 1988-03-14 FR FR8803295A patent/FR2612511B1/fr not_active Expired - Fee Related
- 1988-03-14 GB GB8805996A patent/GB2202927B/en not_active Expired - Fee Related
- 1988-03-16 KR KR1019880002777A patent/KR900003087B1/ko not_active IP Right Cessation
- 1988-03-16 DE DE3808809A patent/DE3808809A1/de active Granted
- 1988-03-16 CN CN88101391A patent/CN1019294B/zh not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3808809A1 (de) | 1988-09-29 |
US4906509A (en) | 1990-03-06 |
KR900003087B1 (ko) | 1990-05-07 |
FR2612511B1 (fr) | 1993-04-09 |
GB2202927B (en) | 1991-04-03 |
DE3808809C2 (zh) | 1991-01-10 |
GB8805996D0 (en) | 1988-04-13 |
JPH0628947B2 (ja) | 1994-04-20 |
FR2612511A1 (fr) | 1988-09-23 |
KR880011041A (ko) | 1988-10-26 |
JPS63224937A (ja) | 1988-09-20 |
CN88101391A (zh) | 1988-10-05 |
GB2202927A (en) | 1988-10-05 |
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