GB983567A - Refractory - Google Patents

Refractory

Info

Publication number
GB983567A
GB983567A GB2843863A GB2843863A GB983567A GB 983567 A GB983567 A GB 983567A GB 2843863 A GB2843863 A GB 2843863A GB 2843863 A GB2843863 A GB 2843863A GB 983567 A GB983567 A GB 983567A
Authority
GB
United Kingdom
Prior art keywords
silica
sio2
ratio
silicon carbide
al2o3
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.)
Expired
Application number
GB2843863A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbison Walker Refractories Co
Original Assignee
Harbison Walker Refractories Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US280367A external-priority patent/US3294910A/en
Application filed by Harbison Walker Refractories Co filed Critical Harbison Walker Refractories Co
Publication of GB983567A publication Critical patent/GB983567A/en
Expired legal-status Critical Current

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Classifications

    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C04B35/185—Mullite 3Al2O3-2SiO2
    • C—CHEMISTRY; METALLURGY
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/481—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing silicon, e.g. zircon
    • C—CHEMISTRY; METALLURGY
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • C—CHEMISTRY; METALLURGY
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C04B2235/3248—Zirconates or hafnates, e.g. zircon
    • C—CHEMISTRY; METALLURGY
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • C—CHEMISTRY; METALLURGY
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
    • C—CHEMISTRY; METALLURGY
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
    • C—CHEMISTRY; METALLURGY
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5463—Particle size distributions
    • C04B2235/5472—Bimodal, multi-modal or multi-fraction
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/661—Multi-step sintering
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/80—Phases present in the sintered or melt-cast ceramic products other than the main phase
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9646—Optical properties
    • C04B2235/9661—Colour
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
    • C04B2235/9684—Oxidation resistance
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
    • C04B2235/9692—Acid, alkali or halogen resistance

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A fired refractory shape is made from a composition consisting of 50-70% silicon carbide (partially replaceable by zircon, not greater than 2 parts zircon to 1 part silicon carbide by weight), the remainder being alumina and silica, at least part of the latter being volatilized silica. The SiO2 to Al2O3 ratio is preferably 10/90-40/60 the best ratio being stated to be 71.8 Al2O3 to 28.2 SiO2, which is the ratio in mullite. Some of the Al2O3 and SiO2 may preferably be present in the form of calcined flint clay. A modification of the compositions of the invention comprises 5-15% finely divided SiO2, at least some of which is volatilized SiO2, 25-50% silicon carbide with possible zircon replacement as before, the balance being alumina and silica, the ratio Al2O3 to SiO2 in the mix being 90 to 10. Here the SiO2 which is not volatilized SiO2 is preferably potter's flint.ALSO:A fired refractory shape is made from a composition consisting of silicon carbide 50-70% (partially replaceable by zircon (ZrO.SiO2) not greater than 2 parts zircon to 1 part silicon carbide by weight), the remainder being alumina and silica, at least part of the latter being volatilized silica. The silicon carbide is all of a particle size finer than 4 mesh (U.S. standard screen) a major proportion being finer than 8 mesh but coarser than 48 mesh. The silica to alumina ratio is preferably 10/90-40/60, the best ratio being stated to be 71.8 Al2O3 to 28.2 SiO2, which is the ratio in mullite. Some of the Al2O3 and SiO2 may preferably be present in the form of calcined flint clay. A modification of the compositions of the invention comprises 5-15% of finely divided silica, at least part of which is volatilized silica, 25-50% of silicon carbide with size restrictions as before, optional zircon replacements as before, the balance being alumina and silica, the ratio of alumina to silica in the mix being 90 : 10. Here the silica which is not volatilized silica is preferably polters flint.
GB2843863A 1962-07-24 1963-07-18 Refractory Expired GB983567A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21206362A 1962-07-24 1962-07-24
US280367A US3294910A (en) 1963-05-14 1963-05-14 Alarm clock electrically connected to telephone bell

Publications (1)

Publication Number Publication Date
GB983567A true GB983567A (en) 1965-02-17

Family

ID=26906723

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2843863A Expired GB983567A (en) 1962-07-24 1963-07-18 Refractory

Country Status (4)

Country Link
BE (1) BE635375A (en)
DE (1) DE1471216C3 (en)
GB (1) GB983567A (en)
NL (1) NL295693A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4814301A (en) * 1984-06-27 1989-03-21 Elektroschmelzwerk Kempten Gmbh Polycrystalline sintered articles based on silicon nitride and sintering additives
US5753572A (en) * 1996-06-28 1998-05-19 Harbison-Walker Refractories Company Castable and gunning composition with improved resistance to build-up and alkali infiltration
GB2302335B (en) * 1995-06-19 1998-08-26 Ngk Spark Plug Co A low-voltage type igniter plug having a semiconductor for use in jet and other internal combustion engines and a method of making the semiconductor
EP2767526A1 (en) * 2011-10-14 2014-08-20 Refractaria S.A. Refractory protective material for clinker furnaces, which prevents thermochemical attack without the formation of encrustation or rings
ITTO20130172A1 (en) * 2013-03-05 2014-09-06 Catanzaro Martino MIXTURE WITH INSULATING PROPERTIES FOR REFRACTORY MATERIALS
CN106396712A (en) * 2016-12-01 2017-02-15 钢城集团凉山瑞海实业有限公司 Castable for steel ladle heater burner and preparation method thereof
CN116332658A (en) * 2023-01-17 2023-06-27 中钢洛耐科技股份有限公司 High-strength high-heat-conductivity composite material for annular heating furnace and preparation method thereof

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994003410A1 (en) * 1992-07-31 1994-02-17 Lonza A.G. Refractory moulded articles made of silicon carbide with mullite bonding, a method of producing such articles, a moulding compound for use as an intermediate in the method, and the use of such articles as kiln furniture
DE4338159A1 (en) * 1993-11-02 1995-05-04 Projektierung Und Anlagenbau G Binder for mullite-bonded SiC-containing products and process for their manufacture
JP3980262B2 (en) * 2000-10-31 2007-09-26 日本碍子株式会社 SiC heat treatment jig
DE10207860B4 (en) * 2002-02-20 2005-12-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Porous silicon carbide ceramic and process for its preparation
DE102018115771A1 (en) * 2018-06-29 2020-01-02 Saint-Gobain Industriekeramik Rödental GmbH Capsule-like receptacle, in particular capsule for burning powdered cathode material for lithium-ion batteries and mixture therefor
CN111825477B (en) * 2020-08-13 2022-05-10 中钢南京环境工程技术研究院有限公司 Preparation method of anti-oxidation silicon carbide kiln furniture

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4814301A (en) * 1984-06-27 1989-03-21 Elektroschmelzwerk Kempten Gmbh Polycrystalline sintered articles based on silicon nitride and sintering additives
GB2302335B (en) * 1995-06-19 1998-08-26 Ngk Spark Plug Co A low-voltage type igniter plug having a semiconductor for use in jet and other internal combustion engines and a method of making the semiconductor
US5852340A (en) * 1995-06-19 1998-12-22 Ngk Spark Plug Co., Ltd. Low-voltage type igniter plug having a semiconductor for use in jet and other internal combustion engines and a method of making the semiconductor
US5753572A (en) * 1996-06-28 1998-05-19 Harbison-Walker Refractories Company Castable and gunning composition with improved resistance to build-up and alkali infiltration
EP2767526A1 (en) * 2011-10-14 2014-08-20 Refractaria S.A. Refractory protective material for clinker furnaces, which prevents thermochemical attack without the formation of encrustation or rings
US20140295368A1 (en) * 2011-10-14 2014-10-02 Refractaria, S.A. Refractory protective material for clinker furnaces, which prevents thermochemical attack without the formation of encrustation or rings
EP2767526A4 (en) * 2011-10-14 2015-04-22 Refractaria S A Refractory protective material for clinker furnaces, which prevents thermochemical attack without the formation of encrustation or rings
ITTO20130172A1 (en) * 2013-03-05 2014-09-06 Catanzaro Martino MIXTURE WITH INSULATING PROPERTIES FOR REFRACTORY MATERIALS
CN106396712A (en) * 2016-12-01 2017-02-15 钢城集团凉山瑞海实业有限公司 Castable for steel ladle heater burner and preparation method thereof
CN106396712B (en) * 2016-12-01 2019-12-17 钢城集团凉山瑞海实业有限公司 Castable for ladle roaster burner and preparation method thereof
CN116332658A (en) * 2023-01-17 2023-06-27 中钢洛耐科技股份有限公司 High-strength high-heat-conductivity composite material for annular heating furnace and preparation method thereof
CN116332658B (en) * 2023-01-17 2023-12-22 中钢洛耐科技股份有限公司 High-strength high-heat-conductivity composite material for annular heating furnace and preparation method thereof

Also Published As

Publication number Publication date
NL295693A (en)
DE1471216A1 (en) 1968-11-28
DE1471216B2 (en) 1974-03-28
DE1471216C3 (en) 1974-11-07
BE635375A (en)

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