CN109020551A - The technique for producing high-density silicon carbide heater - Google Patents

The technique for producing high-density silicon carbide heater Download PDF

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Publication number
CN109020551A
CN109020551A CN201810987813.2A CN201810987813A CN109020551A CN 109020551 A CN109020551 A CN 109020551A CN 201810987813 A CN201810987813 A CN 201810987813A CN 109020551 A CN109020551 A CN 109020551A
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China
Prior art keywords
silicon carbide
heater
mixing pot
glycerol
water
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Withdrawn
Application number
CN201810987813.2A
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Chinese (zh)
Inventor
刘冬义
朱丽辉
朱学武
李发光
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LIAOYANG HONGTU CARBIDE Co Ltd
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LIAOYANG HONGTU CARBIDE Co Ltd
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Priority to CN201810987813.2A priority Critical patent/CN109020551A/en
Publication of CN109020551A publication Critical patent/CN109020551A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63416—Polyvinylalcohols [PVA]; Polyvinylacetates
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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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
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    • C04B35/6365—Cellulose or derivatives thereof
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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
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  • Resistance Heating (AREA)
  • Ceramic Products (AREA)

Abstract

The technique of production high-density silicon carbide heater is related to the technique for producing high-density silicon carbide heater.It is mainly to solve the problems, such as that existing production electrothermal silicon carbide element service life is short and invents.The raw material and weight ratio used are as follows: silicon carbide 10kg, F36 silicon carbide 6.2kg, F46 silicon carbide 2.8kg, F60 silicon carbide 7kg, F80 silicon carbide 7kg, 100F silicon carbide 10.5kg, 5S silicon carbide 12kg, D3E silicon carbide 7.5kg, the methylcellulose 0.8kg, polyvinyl alcohol 0.8kg, 1 ㎏ of glycerol, 4.2 ㎏ of water of F24；F24 silicon carbide and 5S silicon carbide are mixed in mixing pot；Water and glycerol are poured into bucket and stirred；Water and glycerol and the F24 silicon carbide and 5S silicon carbide that mix and remaining raw material are all put into mixing pot and mixed；Then it puts into heater shaping extruder and forms.Advantage is long product lifecycle.

Description

The technique for producing high-density silicon carbide heater
Technical field:
The present invention relates to the techniques of production high-density silicon carbide heater.
Background technique:
Electrothermal silicon carbide element is using temperature at 1500 DEG C hereinafter, having surface loading density big, quick heating, thermal efficiency height etc. excellent Point.Electrothermal silicon carbide element is higher, anti-using temperature and power compared with electric resistance alloy (nichrome, Aludirome) Oxidation susceptibility is more excellent, and does not have the problems such as hot mastication；Compared with dystectic rare precious metal (tungsten, molybdenum, tantalum, platinum), raw material Source is more extensive, price is less expensive；It, can be in a variety of gas compared with other non-metal electrothermal materials (molybdenum disilicide, graphite) It works under atmosphere, uses no many restrictions.Such as molybdenum disilicide occurs low temperature " powder phenomenon-tion " at 400 ~ 700 DEG C, graphite must be It is used in the inert atmospheres such as nitrogen or argon gas.
Therefore, electrothermal silicon carbide element has more superior condition on using temperature and economic value, thus uses ten Divide extensive.Currently, being widely used in 700 ~ 1500 DEG C of various electrical kilns, such as aluminium industry, metal heat treatmet, powder smelting Gold, magnetic material, glass industry, hot investment casting, rare-earth trade etc..
For the carborundum content of the electrothermal silicon carbide element produced using prior art 99% or more, high temeperature chemistry property is steady It is fixed, but under the atmospheric conditions such as high-temperature vapor, hydrogen, nitrogen, sulphur, chlorine, oxidation and corrosion can be generated to barred body；In corrosion ring In border, electrothermal silicon carbide element aging speed is fast, and service life is short.
In addition the production technology of current Elema heater buries firing technique using reaction, not low using only temperature, and And seriously pollute environment.Also the Elema heater for having and preparing silicon carbide heater using recrystallizing technology, but produce Density is all in 2.4g/cm3Left and right is in reduced levels.
Summary of the invention:
Technical problem to be solved by the invention is to provide the processable high density products out of one kind, so that improving product uses the longevity Life, the technique of the small production high-density silicon carbide heater of pollution environment.
Above-mentioned purpose be achieved in that used in raw material and weight ratio are as follows: silicon carbide 10kg that grain size number is F24, F36 silicon carbide 6.2kg, F46 silicon carbide 2.8kg, F60 silicon carbide 7kg, F80 silicon carbide 7kg, 100F silicon carbide 10.5kg, 5S carbon SiClx 12kg, D3E silicon carbide 7.5kg, methylcellulose 0.8kg, polyvinyl alcohol 0.8kg, 1 ㎏ of glycerol, 4.2 ㎏ of water；
The equipment used are as follows: V-type mixing pot, round mixing pot, charging basin, they are all made by Bai Gang.
Manufacture craft: F24 silicon carbide 10kg and 5S silicon carbide 12kg is first mixed 20 minutes in V-type mixing pot；
4.2 ㎏ of water and 1 ㎏ of glycerol are poured into bucket, stirred ten minutes under room temperature；
The water and glycerol that are stirred and the F24 silicon carbide mixed and 5S silicon carbide are put into round mixing pot, then by F36 Silicon carbide 6.2kg, F46 silicon carbide 2.8kg, F60 silicon carbide 7kg, F80 silicon carbide 7kg, 100F silicon carbide 10.5kg, D3E carbonization Silicon 7.5kg, methylcellulose 0.8kg, polyvinyl alcohol 0.8kg are put into round mixing pot, are mixed 40 minutes；Then it puts into It is formed into heater shaping extruder, forming vacuum should be 0.098Mpa or more.Heater shaping extruder tonnage is greater than 350 Ton.
The invention has the advantages that due to according to particle packing theory adjustment particle match grade, to the selection of plasticiser match into Row optimization and the adjustment of hard plastic extrusion pressure, so high-density silicon carbide heater can be produced, density is reachable after tested 2.55g/cm3, to improve product service life.In addition this technological operation is simple, small to pollution environment.
Specific embodiment:
Used raw material and weight ratio are as follows: grain size number is silicon carbide 10kg, F36 silicon carbide 6.2kg, F46 silicon carbide of F24 2.8kg, F60 silicon carbide 7kg, F80 silicon carbide 7kg, 100F silicon carbide 10.5kg, 5S silicon carbide 12kg, D3E silicon carbide 7.5kg, Methylcellulose 0.8kg, polyvinyl alcohol 0.8kg, 1 ㎏ of glycerol, 4.2 ㎏ of water；
The equipment used are as follows: V-type mixing pot, round mixing pot, charging basin, they are all made by Bai Gang.
Manufacture craft: F24 silicon carbide 10kg and 5S silicon carbide 12kg is first mixed 20 minutes in V-type mixing pot；
4.2 ㎏ of water and 1 ㎏ of glycerol are poured into bucket, stirred ten minutes under room temperature；
The water and glycerol that are stirred and the F24 silicon carbide mixed and 5S silicon carbide are put into round mixing pot, then by F36 Silicon carbide 6.2kg, F46 silicon carbide 2.8kg, F60 silicon carbide 7kg, F80 silicon carbide 7kg, 100F silicon carbide 10.5kg, D3E carbonization Silicon 7.5kg, methylcellulose 0.8kg, polyvinyl alcohol 0.8kg are put into round mixing pot, are mixed 40 minutes；Then it puts into It is formed into heater shaping extruder, forming vacuum should be 0.098Mpa or more.Heater shaping extruder tonnage is greater than 350 Ton.

Claims (1)

1. the technique of high-density silicon carbide heater is produced, it is characterized in that: used raw material and weight ratio are as follows: grain size number is Silicon carbide 10kg, F36 silicon carbide 6.2kg, F46 silicon carbide 2.8kg, F60 silicon carbide 7kg, F80 silicon carbide 7kg, 100F of F24 Silicon carbide 10.5kg, 5S silicon carbide 12kg, D3E silicon carbide 7.5kg, methylcellulose 0.8kg, polyvinyl alcohol 0.8kg, glycerol 1 ㎏, 4.2 ㎏ of water；
The equipment used are as follows: V-type mixing pot, round mixing pot, charging basin, they are all made by Bai Gang；
Manufacture craft: F24 silicon carbide 10kg and 5S silicon carbide 12kg is first mixed 20 minutes in V-type mixing pot；
4.2 ㎏ of water and 1 ㎏ of glycerol are poured into bucket, stirred ten minutes under room temperature；
The water and glycerol that are stirred and the F24 silicon carbide mixed and 5S silicon carbide are put into round mixing pot, then by F36 Silicon carbide 6.2kg, F46 silicon carbide 2.8kg, F60 silicon carbide 7kg, F80 silicon carbide 7kg, 100F silicon carbide 10.5kg, D3E carbonization Silicon 7.5kg, methylcellulose 0.8kg, polyvinyl alcohol 0.8kg are put into round mixing pot, are mixed 40 minutes；Then it puts into It is formed into heater shaping extruder.
CN201810987813.2A 2018-08-28 2018-08-28 The technique for producing high-density silicon carbide heater Withdrawn CN109020551A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59184773A (en) * 1983-04-04 1984-10-20 日立化成工業株式会社 Manufacture of silicon carbide sintered body
CN103274691A (en) * 2013-04-22 2013-09-04 登封市钰锋电热材料有限公司 Production method for high temperature crystallized silicon carbide composite electric heating element
CN104602371A (en) * 2015-01-28 2015-05-06 周献 Composite silicon carbide electrical heating element and production method thereof
CN105712727A (en) * 2016-01-19 2016-06-29 山东宝纳新材料有限公司 Silicon carbide composite ceramic heat exchanger tube with high heat shock resistance and method for manufacturing silicon carbide composite ceramic heat exchanger tube
CN107986791A (en) * 2017-12-12 2018-05-04 湖南太子新材料科技有限公司 A kind of carborundum sheet material and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59184773A (en) * 1983-04-04 1984-10-20 日立化成工業株式会社 Manufacture of silicon carbide sintered body
CN103274691A (en) * 2013-04-22 2013-09-04 登封市钰锋电热材料有限公司 Production method for high temperature crystallized silicon carbide composite electric heating element
CN104602371A (en) * 2015-01-28 2015-05-06 周献 Composite silicon carbide electrical heating element and production method thereof
CN105712727A (en) * 2016-01-19 2016-06-29 山东宝纳新材料有限公司 Silicon carbide composite ceramic heat exchanger tube with high heat shock resistance and method for manufacturing silicon carbide composite ceramic heat exchanger tube
CN107986791A (en) * 2017-12-12 2018-05-04 湖南太子新材料科技有限公司 A kind of carborundum sheet material and preparation method thereof

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