CN110272284A - The preparation method of Sialon combined silicon carbide ceramic lift tube - Google Patents

The preparation method of Sialon combined silicon carbide ceramic lift tube Download PDF

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Publication number
CN110272284A
CN110272284A CN201910553224.8A CN201910553224A CN110272284A CN 110272284 A CN110272284 A CN 110272284A CN 201910553224 A CN201910553224 A CN 201910553224A CN 110272284 A CN110272284 A CN 110272284A
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Prior art keywords
silicon carbide
mixed powder
lift tube
powder
ceramic lift
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CN201910553224.8A
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Inventor
程之勇
唐竹兴
程彦森
白佳海
何静
谭立新
冯锐
寇连星
高增丽
张海艳
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DONGYING XINKEXINTETAO Co Ltd
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DONGYING XINKEXINTETAO Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
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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
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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
    • C04B35/58—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/597—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon oxynitride, e.g. SIALONS
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
    • C04B2235/3218—Aluminium (oxy)hydroxides, e.g. boehmite, gibbsite, alumina sol
    • 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
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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
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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
    • C04B2235/40—Metallic constituents or additives not added as binding phase
    • C04B2235/402—Aluminium
    • 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
    • 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
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428—Silicon
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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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562—Heating rate
    • C—CHEMISTRY; METALLURGY
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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
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
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Abstract

The preparation method of Sialon combined silicon carbide ceramic lift tube, by Aluminum sol, silica solution, metallic silicon power and metallic aluminium powder, mixed powder 1 is made in drying after evenly mixing, then silicon carbide powder is added, mixed powder 2 is made after mixing, mixed powder 2 is fired into Sialon combined silicon carbide ceramic lift tube after isostatic pressing.The present invention, which the advantage is that, uses Aluminum sol, silica solution, metallic silicon power and metallic aluminium powder as raw material, so that object mix it is more uniform, silicon nitride and aluminium nitride are generated in sintering procedure, newly-generated silicon nitride and aluminium nitride activity are high, so that its in Aluminum sol and silica solution aluminium oxide and oxidation pasc reaction generate that match grand temperature lower, the coefficient of expansion of grand phase is matched by changing composition and firing temperature adjustment, it is allowed to match with the coefficient of expansion of silicon carbide, improves the service life of Sialon combined silicon carbide ceramic lift tube.

Description

The preparation method of Sialon combined silicon carbide ceramic lift tube
Technical field
The present invention relates to a kind of preparation methods of Sialon combined silicon carbide ceramic lift tube, belong to preparation technology of ceramic materials Field.
Background technique
Ceramic lift tube is applied to aluminium alloy casting industry, and it is logical that connection Casting Equipment and casting mould form aluminium alloy melt Road, aluminium alloy melt interval passes through ceramic lift tube in process of production, makes frequency, intensity of the ceramic lift tube by thermal shock It is higher, it is easily allowed to crack damage.Mainly use aluminium titanates, Sai Long, silicon nitride, silicon oxynitride combination carbon both at home and abroad at present The materials ceramic lift tube such as SiClx, silicon nitride combined silicon carbide.Aluminium titanates and silicon nitride combined silicon carbide material ceramic lift tube Service life is shorter, is not able to satisfy production needs, and the price of Sialon ceramics stalk or silicon nitride ceramics stalk is too high.
Summary of the invention
The purpose of the present invention is to provide a kind of Sialon combined silicon carbide potteries for being suitable for aluminium alloy casting industry and using The preparation method of porcelain stalk, technical solution are as follows:
By Aluminum sol, silica solution, metallic silicon power and metallic aluminium powder, mixed powder 1 is made in drying after evenly mixing, and carbon is then added Mixed powder 2 is made in SiClx powder after mixing, then mixed powder 2 is fired into the grand combination of match after isostatic pressing and is carbonized Silicon ceramic lift tube, the specific steps are as follows:
(1) preparation of mixed powder 1: the Aluminum sol for being 10 ~ 30% by alumina content: the silicon that dioxide-containing silica is 10 ~ 30% Colloidal sol: the metallic silicon power that granularity is 3 ~ 20 μm: the metallic aluminium powder that granularity is 3 ~ 20 μm is with weight percent for 51 ~ 80:29 ~ 14: Mixed powder 1 is made in the ratio uniform mixing of 10 ~ 3:10 ~ 3 after drying；
(2) preparation of mixed powder 2: by mixed powder 1: granularity be 3 μm ~ 2mm silicon carbide powder with weight percent be 38 ~ At mixed powder 2 processed after the ratio uniform mixing of 72:62 ~ 28；
(3) mixed powder 2 uniformly the preparation of Sialon combined silicon carbide ceramic lift tube green body: is packed into Sialon combined silicon carbide pottery The interior isostatic pressing under 100 ~ 300MPa. pressure of porcelain stalk mold, is made Sialon combined silicon carbide ceramic lift tube green body；
(4) manufactured Sialon combined silicon carbide ceramic lift tube green body is slowly heated up 4 within the temperature range of 450 DEG C ~ 600 DEG C ~ 8 hours, 620 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then slowly heat up 4 ~ 8 hours within the temperature range of 1300 ~ 1400 DEG C, 1420 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then 1420 ~ 1550 DEG C at a temperature of fire the grand combination of match be made within 2 ~ 4 hours Silicon carbide ceramics stalk.
The present invention the advantage is that:
1, the present invention use Aluminum sol, silica solution, metallic silicon power and metallic aluminium powder for raw material so that object mix it is more uniform, And more come into full contact with silicon-carbide particle, the grand phase of the match of generation is closer in conjunction with silicon-carbide particle；
2, the metallic silicon power and metallic aluminium powder that the present invention uses generate silicon nitride and aluminium nitride, newly-generated nitrogen in sintering procedure SiClx and aluminium nitride activity are high so that its in Aluminum sol and silica solution aluminium oxide and oxidation pasc reaction generate the grand temperature of match It is lower.
3, the swollen of grand phase can be matched by changing composition and firing temperature adjustment using formula system provided by the present invention Swollen coefficient is allowed to match with the coefficient of expansion of silicon carbide, improves Sialon combined silicon carbide ceramic lift tube thermal shock resistance, To improve the service life of Sialon combined silicon carbide ceramic lift tube.
Specific embodiment:
Embodiment 1
(1) preparation of mixed powder 1: the Aluminum sol for being 10% by alumina content: the silica solution that dioxide-containing silica is 10%: grain The metallic silicon power that degree is 3 μm: the metallic aluminium powder that granularity is 3 μm is mixed with weight percent for the ratio uniform of 51:29:10:10 Mixed powder 1 is made after drying；
(2) preparation of mixed powder 2: by mixed powder 1: granularity is ratio of 3 μm of silicon carbide powders with weight percent for 38:62 Example is after evenly mixing at mixed powder 2 processed；
(3) mixed powder 2 uniformly the preparation of Sialon combined silicon carbide ceramic lift tube green body: is packed into Sialon combined silicon carbide pottery The interior isostatic pressing under 100MPa. pressure of porcelain stalk mold, is made Sialon combined silicon carbide ceramic lift tube green body；
(4) manufactured Sialon combined silicon carbide ceramic lift tube green body is slowly heated up 4 hours within the temperature range of 450 DEG C, 620 DEG C at a temperature of keep the temperature 2 hours, then slowly heat up 4 hours within the temperature range of 1300 DEG C, 1420 DEG C at a temperature of Heat preservation 2 hours, is fired into Sialon combined silicon carbide ceramic lift tube.
Embodiment 2
(1) preparation of mixed powder 1: the Aluminum sol for being 20% by alumina content: the silica solution that dioxide-containing silica is 230%: The metallic silicon power that granularity is 10 μm: the metallic aluminium powder that granularity is 10 μm is mixed for the ratio uniform of 65:21:7:7 with weight percent Mixed powder 1 is made in conjunction after drying；
(2) preparation of mixed powder 2: by mixed powder 1: granularity is ratio of the 1mm silicon carbide powder with weight percent for 60:40 Example is after evenly mixing at mixed powder 2 processed；
(3) mixed powder 2 uniformly the preparation of Sialon combined silicon carbide ceramic lift tube green body: is packed into Sialon combined silicon carbide pottery The interior isostatic pressing under 200MPa. pressure of porcelain stalk mold, is made Sialon combined silicon carbide ceramic lift tube green body；
(4) manufactured Sialon combined silicon carbide ceramic lift tube green body is slowly heated up 6 hours within the temperature range of 530 DEG C, 620 DEG C at a temperature of keep the temperature 3 hours, then slowly heat up 6 hours within the temperature range of 1350 DEG C, 1420 DEG C at a temperature of Then Sialon combined silicon carbide ceramic lift tube is made in 3 hours in 1480 DEG C of at a temperature of firing in heat preservation 3 hours.
Embodiment 3
(1) preparation of mixed powder 1: the Aluminum sol for being 30% by alumina content: the silica solution that dioxide-containing silica is 30%: grain The metallic silicon power that degree is 20 μm: the metallic aluminium powder that granularity is 20 μm is mixed with weight percent for the ratio uniform of 80:14:3:3 Mixed powder 1 is made after drying；
(2) preparation of mixed powder 2: by mixed powder 1: granularity is ratio of the 2mm silicon carbide powder with weight percent for 72:28 Example is after evenly mixing at mixed powder 2 processed；
(3) mixed powder 2 uniformly the preparation of Sialon combined silicon carbide ceramic lift tube green body: is packed into Sialon combined silicon carbide pottery The interior isostatic pressing under 300MPa. pressure of porcelain stalk mold, is made Sialon combined silicon carbide ceramic lift tube green body；
(4) manufactured Sialon combined silicon carbide ceramic lift tube green body is slowly heated up 8 hours within the temperature range of 600 DEG C, 620 DEG C at a temperature of keep the temperature 4 hours, then slowly heat up 8 hours within the temperature range of 1400 DEG C, 1420 DEG C at a temperature of Then Sialon combined silicon carbide ceramic lift tube is made in 4 hours in 1550 DEG C of at a temperature of firing in heat preservation 4 hours.

Claims (1)

1. the preparation method of Sialon combined silicon carbide ceramic lift tube, which is characterized in that by Aluminum sol, silica solution, metallic silicon power Mixed powder 1 is made in drying after evenly mixing with metallic aluminium powder, silicon carbide powder is then added, mixed powder is made after mixing Body 2, then mixed powder 2 is fired into Sialon combined silicon carbide ceramic lift tube after isostatic pressing, the specific steps are as follows:
(1) preparation of mixed powder 1: the Aluminum sol for being 10 ~ 30% by alumina content: the silicon that dioxide-containing silica is 10 ~ 30% Colloidal sol: the metallic silicon power that granularity is 3 ~ 20 μm: the metallic aluminium powder that granularity is 3 ~ 20 μm is with weight percent for 51 ~ 80:29 ~ 14: Mixed powder 1 is made in the ratio uniform mixing of 10 ~ 3:10 ~ 3 after drying；
(2) preparation of mixed powder 2: by mixed powder 1: granularity be 3 μm ~ 2mm silicon carbide powder with weight percent be 38 ~ At mixed powder 2 processed after the ratio uniform mixing of 72:62 ~ 28；
(3) mixed powder 2 uniformly the preparation of Sialon combined silicon carbide ceramic lift tube green body: is packed into Sialon combined silicon carbide pottery The interior isostatic pressing under 100 ~ 300MPa. pressure of porcelain stalk mold, is made Sialon combined silicon carbide ceramic lift tube green body；
(4) manufactured Sialon combined silicon carbide ceramic lift tube green body is slowly heated up 4 within the temperature range of 450 DEG C ~ 600 DEG C ~ 8 hours, 620 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then slowly heat up 4 ~ 8 hours within the temperature range of 1300 ~ 1400 DEG C, 1420 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then 1420 ~ 1550 DEG C at a temperature of fire the grand combination of match be made within 2 ~ 4 hours Silicon carbide ceramics stalk.
CN201910553224.8A 2019-06-25 2019-06-25 The preparation method of Sialon combined silicon carbide ceramic lift tube Pending CN110272284A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4243621A (en) * 1977-09-28 1981-01-06 Toshiba Ceramics Co., Ltd. β'-Sialon sintered body and a method for manufacturing the same
WO2002092535A1 (en) * 2001-05-16 2002-11-21 Industrial Research Limited Sialon ceramics
CN1403412A (en) * 2002-09-28 2003-03-19 中国科学院上海硅酸盐研究所 Refractory material for slot-type ventilating brick of refining steel ladle and its prepn
CN101407422A (en) * 2008-08-08 2009-04-15 东营新科信特陶有限责任公司 Sialon complex phase ceramic lift tube and production method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4243621A (en) * 1977-09-28 1981-01-06 Toshiba Ceramics Co., Ltd. β'-Sialon sintered body and a method for manufacturing the same
WO2002092535A1 (en) * 2001-05-16 2002-11-21 Industrial Research Limited Sialon ceramics
CN1403412A (en) * 2002-09-28 2003-03-19 中国科学院上海硅酸盐研究所 Refractory material for slot-type ventilating brick of refining steel ladle and its prepn
CN101407422A (en) * 2008-08-08 2009-04-15 东营新科信特陶有限责任公司 Sialon complex phase ceramic lift tube and production method thereof

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Application publication date: 20190924