CN110143811A - The preparation method of injection forming M- Sialon combined silicon carbide ceramic lift tube - Google Patents

The preparation method of injection forming M- Sialon combined silicon carbide ceramic lift tube Download PDF

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CN110143811A
CN110143811A CN201910553128.3A CN201910553128A CN110143811A CN 110143811 A CN110143811 A CN 110143811A CN 201910553128 A CN201910553128 A CN 201910553128A CN 110143811 A CN110143811 A CN 110143811A
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mixed
powder
silicon carbide
lift tube
injection forming
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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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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
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Abstract

The preparation method of injection forming M- Sialon combined silicon carbide ceramic lift tube, it is characterized in that, mixed powder is made in aluminium oxide, quartz glass, metallic aluminium and metallic silicon after evenly mixing, Aluminum sol, silica solution and water are uniformly mixed and made into mixed solution, mixed powder, silicon carbide powder, mixed solution are uniformly mixed and made into mixed slurry again, injection forming M- Sialon combined silicon carbide ceramic lift tube is made using injection forming.It the advantage is that and use 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 it is lower to generate the grand temperature of match, the coefficient of expansion of grand phase is matched by changing composition and firing temperature adjustment, is allowed to match with the coefficient of expansion of silicon carbide, improves the service life of M- Sialon combined silicon carbide ceramic lift tube.

Description

The preparation method of injection forming M- Sialon combined silicon carbide ceramic lift tube
Technical field
The present invention relates to a kind of preparation methods of injection forming M- Sialon combined silicon carbide ceramic lift tube, belong to ceramic material Expect preparation technical 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 yttrium acid aluminium, 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.Yttrium acid aluminium 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 M- Sialon combined silicon carbides for being suitable for aluminium alloy casting industry and using The preparation method of ceramic lift tube, technical solution are as follows:
Alumina powder, quartz glass powder, metallic aluminium powder and the additional yttrium dioxide of metallic silicon power are made after evenly mixing mixed Powder is closed, Aluminum sol, silica solution and water are uniformly mixed and made into mixed solution, then mixed powder, silicon carbide powder, mixing is molten Liquid is uniformly mixed and made into mixed slurry, then while vibration while stir inject plaster mold in, demoulded after solidification, dry after be fired into Injection forming M- Sialon combined silicon carbide ceramic lift tube, wherein M is yttrium oxide or magnesia or barium monoxide or niobium oxide, Or praseodymium oxide or titanium oxide or samarium oxide, the specific steps are as follows:
(1) preparation of mixed powder: the alumina powder for being 0.5 ~ 3 μm by granularity: the fused silica powder that granularity is 0.5 ~ 3 μm Body: granularity is 1 ~ 20 μm of metallic aluminium powder: granularity be 1 ~ 20 μm of metallic silicon power with weight percent for 10 ~ 30:40 ~ 60:25 ~ 5:25 Mixed powder is made in the M of the 1-15% of the sum of the additional above-mentioned four kinds of composition weights of ~ 5 ratio after evenly mixing；
(2) preparation of mixed solution: the Aluminum sol for being 10 ~ 30% by alumina content: the silicon that dioxide-containing silica is 10 ~ 30% is molten Glue: water is that 10 ~ 45:10 ~ 45:10 ~ 80 are uniformly mixed and made into mixed solution with weight percent；
(3) preparation of mixed slurry: by mixed powder: silicon carbide powder: mixed solution with weight percent be 60 ~ 20:10 ~ 30:30 ~ 50 are uniformly mixed and made into mixed slurry, wherein the 3 μm ~ 2mm of granularity of silicon carbide powder；
(4) mixed slurry the preparation of injection forming M- Sialon combined silicon carbide ceramic lift tube green body: is stirred into note in vibration Enter in plaster mold, demoulded after solidification, dry after injection forming M- Sialon combined silicon carbide ceramic lift tube green body is made；
(5) temperature range by manufactured injection forming M- Sialon combined silicon carbide ceramic lift tube green body at 450 DEG C ~ 600 DEG C It is interior it is slow heating 4 ~ 8 hours, 620 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then within the temperature range of 1300 ~ 1400 DEG C slowly Heating 4 ~ 8 hours, 1420 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then 1420 ~ 1550 DEG C at a temperature of fire 2 ~ 4 hours Injection forming M- Sialon combined silicon carbide ceramic lift tube is made.
By the technical program, the beneficial effect of acquirement is:
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, grand phase can be matched by changing M additive amount and firing temperature adjustment using formula system provided by the present invention The coefficient of expansion is allowed to match with the coefficient of expansion of silicon carbide, improves M- Sialon combined silicon carbide ceramic lift tube heat shock resistance Ability, to improve the service life of M- Sialon combined silicon carbide ceramic lift tube.
Specific embodiment:
Embodiment 1
(1) preparation of mixed powder: the alumina powder for being 0.5 μm by granularity: the quartz glass powder that granularity is 0.5 μm: grain Degree be 3 μm of metallic aluminium powders: granularity be 3 μm of metallic silicon powers with weight percent for additional above-mentioned four kinds of the ratio of 10:40:25:25 Mixed powder is made in 1% yttrium dioxide of the sum of composition weight after evenly mixing；
(2) preparation of mixed solution: the Aluminum sol for being 30% by alumina content: the silica solution that dioxide-containing silica is 30%: water It is that 10:10:80 is uniformly mixed and made into mixed solution with weight percent；
(3) preparation of mixed slurry: by mixed powder: silicon carbide powder: mixed solution is that 60:10:30 is equal with weight percent It is even to be mixed and made into mixed slurry, wherein 3 μm of the granularity of silicon carbide powder；
(4) mixed slurry the preparation of injection forming M- Sialon combined silicon carbide ceramic lift tube green body: is stirred into note in vibration Enter in plaster mold, demoulded after solidification, dry after injection forming M- Sialon combined silicon carbide ceramic lift tube green body is made；
(5) manufactured injection forming M- Sialon combined silicon carbide ceramic lift tube green body is delayed within the temperature range of 450 DEG C DEG C Slow heating 4 hours, 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, 2 hours are kept the temperature at a temperature of 1420 DEG C, injection forming M- is then made within 2 hours in 1420 DEG C of at a temperature of firing and matches grand combination carbon SiClx ceramic lift tube.
Embodiment 2
(1) preparation of mixed powder: the alumina powder for being 1.5 μm by granularity: the quartz glass powder that granularity is 1.5 μm: grain Degree be 10 μm of metallic aluminium powders: granularity be 10 μm of metallic silicon powers with weight percent for the ratio of 20:50:15:15 additional above-mentioned four Mixed powder is made in 8% yttrium dioxide of the sum of kind composition weight after evenly mixing；
(2) preparation of mixed solution: the Aluminum sol for being 20% by alumina content: the silica solution that dioxide-containing silica is 20%: water It is that 28:28:44 is uniformly mixed and made into mixed solution with weight percent；
(3) preparation of mixed slurry: by mixed powder: silicon carbide powder: mixed solution is that 40:20:40 is equal with weight percent It is even to be mixed and made into mixed slurry, wherein the granularity 1mm of silicon carbide powder；
(4) mixed slurry the preparation of injection forming M- Sialon combined silicon carbide ceramic lift tube green body: is stirred into note in vibration Enter in plaster mold, demoulded after solidification, dry after injection forming M- Sialon combined silicon carbide ceramic lift tube green body is made；
(5) manufactured injection forming M- Sialon combined silicon carbide ceramic lift tube green body is slow within the temperature range of 520 DEG C Heating 6 hours, 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 3 hours are kept the temperature at a temperature of DEG C, then injection forming M- Sialon combined silicon carbide is made within 3 hours in 1480 DEG C of at a temperature of firing Ceramic lift tube.
Embodiment 3
(1) preparation of mixed powder: the alumina powder for being 3 μm by granularity: the quartz glass powder that granularity is 3 μm: granularity is 20 μm of metallic aluminium powders: granularity is ratio additional above-mentioned four kind group of 20 μm of metallic silicon powers with weight percent for 30:60:5:5 Mixed powder is made in 15% yttrium dioxide of the sum of point weight after evenly mixing；
(2) preparation of mixed solution: the Aluminum sol for being 10% by alumina content: the silica solution that dioxide-containing silica is 10%: water It is that 45:45:10 is uniformly mixed and made into mixed solution with weight percent；
(3) preparation of mixed slurry: by mixed powder: silicon carbide powder: mixed solution is 20:30:50 with weight percent Uniformly it is mixed and made into mixed slurry, wherein the granularity 2mm of silicon carbide powder；
(4) mixed slurry the preparation of injection forming M- Sialon combined silicon carbide ceramic lift tube green body: is stirred into note in vibration Enter in plaster mold, demoulded after solidification, dry after injection forming M- Sialon combined silicon carbide ceramic lift tube green body is made；
(5) manufactured injection forming M- Sialon combined silicon carbide ceramic lift tube green body is slow within the temperature range of 600 DEG C Heating 8 hours, 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 4 hours are kept the temperature at a temperature of DEG C, then injection forming M- Sialon combined silicon carbide is made within 4 hours in 1480 DEG C of at a temperature of firing Ceramic lift tube.

Claims (1)

1. the preparation method of injection forming M- Sialon combined silicon carbide ceramic lift tube, which is characterized in that by alumina powder, stone Mixed powder is made in English glass powder, metallic aluminium powder and the additional M of metallic silicon power after evenly mixing, by Aluminum sol, silica solution and water It uniformly is mixed and made into mixed solution, then mixed powder, silicon carbide powder, mixed solution are uniformly mixed and made into mixed slurry, so Back shake side stirring injection plaster mold in, demoulded after solidification, dry after be fired into injection forming M- Sialon combined silicon carbide Ceramic lift tube, wherein M is yttrium oxide or magnesia or barium monoxide or niobium oxide or praseodymium oxide or titanium oxide, or oxidation Samarium, the specific steps are as follows:
(1) preparation of mixed powder: the alumina powder for being 0.5 ~ 3 μm by granularity: the fused silica powder that granularity is 0.5 ~ 3 μm Body: granularity is 1 ~ 20 μm of metallic aluminium powder: granularity be 1 ~ 20 μm of metallic silicon power with weight percent for 10 ~ 30:40 ~ 60:25 ~ 5:25 Mixed powder is made in the M of the 1-15% of the sum of the additional above-mentioned four kinds of composition weights of ~ 5 ratio after evenly mixing；
(2) preparation of mixed solution: the Aluminum sol for being 10 ~ 30% by alumina content: the silicon that dioxide-containing silica is 10 ~ 30% is molten Glue: water is that 10 ~ 45:10 ~ 45:10 ~ 80 are uniformly mixed and made into mixed solution with weight percent；
(3) preparation of mixed slurry: by mixed powder: silicon carbide powder: mixed solution with weight percent be 60 ~ 20:10 ~ 30:30 ~ 50 are uniformly mixed and made into mixed slurry, wherein the 3 μm ~ 2mm of granularity of silicon carbide powder；
(4) mixed slurry the preparation of injection forming M- Sialon combined silicon carbide ceramic lift tube green body: is stirred into note in vibration Enter in plaster mold, demoulded after solidification, dry after injection forming M- Sialon combined silicon carbide ceramic lift tube green body is made；
(5) temperature range by manufactured injection forming M- Sialon combined silicon carbide ceramic lift tube green body at 450 DEG C ~ 600 DEG C It is interior it is slow heating 4 ~ 8 hours, 620 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then within the temperature range of 1300 ~ 1400 DEG C slowly Heating 4 ~ 8 hours, 1420 DEG C at a temperature of keep the temperature 2 ~ 4 hours, then 1420 ~ 1550 DEG C at a temperature of fire 2 ~ 4 hours Injection forming M- Sialon combined silicon carbide ceramic lift tube is made.
CN201910553128.3A 2019-06-25 2019-06-25 The preparation method of injection forming M- Sialon combined silicon carbide ceramic lift tube Pending CN110143811A (en)

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Citations (6)

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WO2002092535A1 (en) * 2001-05-16 2002-11-21 Industrial Research Limited Sialon ceramics
CN1793038A (en) * 2005-11-18 2006-06-28 清华大学 Process for sintering Sialong binding silicon carbide refractory by microwave tech.
CN101550005A (en) * 2009-04-28 2009-10-07 河南海格尔高温材料有限公司 Method for manufacturing sialon/silicon nitride composite binding carborundum product
CN101891486A (en) * 2010-06-23 2010-11-24 马鞍山钢铁股份有限公司 High thermal conductivity Sialon-SiC complex phase ceramic fireproof material for dry coke quenching furnace and production method thereof
CN107162597A (en) * 2017-06-21 2017-09-15 河南北星精细陶瓷有限公司 A kind of formula of moulding by casting silicon nitride products based on silicon carbide and preparation method thereof
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Publication number Priority date Publication date Assignee Title
WO2002092535A1 (en) * 2001-05-16 2002-11-21 Industrial Research Limited Sialon ceramics
CN1793038A (en) * 2005-11-18 2006-06-28 清华大学 Process for sintering Sialong binding silicon carbide refractory by microwave tech.
CN101550005A (en) * 2009-04-28 2009-10-07 河南海格尔高温材料有限公司 Method for manufacturing sialon/silicon nitride composite binding carborundum product
CN101891486A (en) * 2010-06-23 2010-11-24 马鞍山钢铁股份有限公司 High thermal conductivity Sialon-SiC complex phase ceramic fireproof material for dry coke quenching furnace and production method thereof
CN107162597A (en) * 2017-06-21 2017-09-15 河南北星精细陶瓷有限公司 A kind of formula of moulding by casting silicon nitride products based on silicon carbide and preparation method thereof
CN108610067A (en) * 2018-05-18 2018-10-02 中钢集团耐火材料有限公司 A kind of silicon carbide articles and preparation method thereof of Gao Sailong phases

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王迎军: "《新型材料科学与技术 无机材料卷 上》", 31 October 2016, 华南理工大学出版社 *

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