CN1252397A - Preparation of sintered silicon carbide material - Google Patents
Preparation of sintered silicon carbide material Download PDFInfo
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- CN1252397A CN1252397A CN 99119733 CN99119733A CN1252397A CN 1252397 A CN1252397 A CN 1252397A CN 99119733 CN99119733 CN 99119733 CN 99119733 A CN99119733 A CN 99119733A CN 1252397 A CN1252397 A CN 1252397A
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- silicon carbide
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- kyanite
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Abstract
By means of the moistening effect produced by decomposed kyanite minerals at high temperature and the chemical fiber reinforcing effect of mullite, the present invention prepares sintered silicon carbide material by using silicon carbide and kyanite mineral powder as main raw materials and through such procedures as mixing, forming, drying, and sintering. This method can raise effectively the combination strength between interfaces of silicon carbide grains and the antioxidation of silicon carbide, and the technological process is simple, low in sintering temperature and low in production cost. The refractory material produced by the said method may be used in lining and furniture of various high-temperature furnaces and kilns, and high-temperature ceramic device and as material for abrasive tools.
Description
The present invention relates to a kind of preparation method of sintered silicon carbide material.
Sintered silicon carbide material is to be main raw material with industrial silicon carbide (SiC), high grade refractory by sintering method production, its wear resistance and solidity to corrosion are good, hot strength is big, thermal conductivity is high, thermal expansivity is little, good thermal shock stability, industrial water requirement increases sharply, and Application Areas constantly enlarges.At present, sintered silicon carbide material has been widely used in furnace lining, the mouth of a river, pipeline, refractory slab, crucible, muffle material and the high-temperature device etc. of the various hot industry kilns in fields such as iron and steel, non-ferrous metal, pottery, chemical industry, rocket.
The siliceous goods of carbonization are that a class is difficult to the agglomerating material, and its use properties and quality product depend on the situation of the content and the wedding agent of silicon carbide to a great extent.Therefore, generally with its by the wedding agent type be divided into oxide-bonded, nitride bonded, recrystallize, from crystalline etc.Wherein, the siliceous goods use properties of the carbonization of nitride bonded is best, but complex process, the production cost height; The siliceous goods technology of clay (oxide compound) bonded carbonization is simple, cost is low, and the output maximum is used the most universal.
The purpose of this invention is to provide a kind of with silicon carbide and natural composite oxides--the aluminium silicate mineral micro mist is a main raw material, prepares the method for carborundum material with sintering process.Its ultimate principle is to utilize the mineral (Al of kyanite family
2O
3.SiO
2) (comprising kyanite, andaluzite and three kinds of heteromorphism mineral of sillimanite) micro mist is decomposed into the mullite fiber (3Al of solid phase under hot conditions
2O
32SiO
2) and the SiO of liquid phase
2:
3 (Al
2O
3SiO
2)-3Al
2O
32SiO
2+ SiO
2And the SiO of liquid phase
2Silicon-carbide particle is had the characteristics of good wettability, directly prepare by the siliceous sintered article of the carbonization of mullite bonded by sintering process.This material refractoriness height, physical strength is big, can be used for making furnace lining, kiln furnitures, refractory ceramics device and the grinding tool material of multiple high temperature kiln.This method can improve the bonding strength at silicon-carbide particle interface and the oxidation-resistance of silicon carbide effectively, and technical process is simple, sintering temperature is low, production cost is low, is easy to promote, implement.
The present invention realizes by following manner.
The preparation method of this sintered silicon carbide material is that the micro mist with silicon-carbide particle material and kyanite family mineral is a main raw material, adopts following step to carry out:
(1) batching step: described silicon-carbide particle material is cooperated by following weight ratio with kyanite family mineral micro powder, aluminum oxide powder, bonding clay, binding agent:
Silicon-carbide particle material 0～0.1mm 65～90%
Kyanite family mineral micro powder 0～30 μ m 10～25%
Aluminum oxide powder 0～20 μ m 1～5%
Bonding clay 0～80 μ m 5～15%
Liquid-containing binder (adding) 8～12%
(2) batch mixing step: raw material is mixed and stirred 5～10 minutes by described proportioning, make it become uniform pug.
(3) forming step: described pug is made moulded pottery not yet put in a kiln to bake with high-pressure molding equipment or manual ramming method.
(4) drying step: described moulded pottery not yet put in a kiln to bake is dried more than 24 hours at 100～110 ℃, or natural air drying is more than 2 days.
(5) burn till step: described moulded pottery not yet put in a kiln to bake is warming up to 1350～1450 ℃ burns till.
Among the present invention, all adopt general-purpose equipment to carry out to each step such as dry, as to burn till from the preparation of raw material, batching, batch mixing.
In the used raw material of the present invention, silicon carbide, aluminum oxide powder are industry raw material commonly used.
Kyanite of the present invention family mineral are meant kyanite, andaluzite and three kinds of heteromorphism mineral of sillimanite, when the preparation sintered silicon carbide material, only use a kind of getting final product wherein, also two or three mineral in three kinds of mineral can be mixed and use, its micro mist be ore by kyanite family mineral through fragmentation, adopt the micron-sized powder of granularity＜30 μ m that beneficiation method such as ordinary method such as flotation, gravity treatment, magnetic separation and conventional superfine grinding equipment obtains.
Bonding clay used in the present invention is the fireclay raw material of industrial general.Liquid-containing binder is the general binding agent of refractory industry, as PHOSPHORIC ACID TECH.GRADE solution, spent pulping liquor, water glass solution etc.
Sintered silicon carbide material of the present invention can be a different shape.
Describe in detail with embodiment below
Embodiment 1
The kyanite ore after fragmentation, ore dressing, superfine grinding, is obtained the kyanite micro mist of granularity＜30 μ m.Undertaken by following step then:
(1) batching step: described silicon-carbide particle material is cooperated by following weight ratio with kyanite micro mist, aluminum oxide powder, bonding clay, binding agent:
Silicon-carbide particle material 0～0.1mm 75%
Kyanite micro mist 0～30 μ m 15%
Aluminum oxide powder 0～20 μ m 2%
Bonding clay 0～80 μ m 8%
Industrial phosphoric acid solution (external force) 10%
(2) batch mixing step: raw material is mixed and stirred 5～10 minutes by described proportioning, make it become uniform pug.
(3) forming step: described pug is made moulded pottery not yet put in a kiln to bake with high-pressure molding equipment or manual ramming method.
(4) drying step: described moulded pottery not yet put in a kiln to bake is dried more than 24 hours at 100～110 ℃, or natural air drying is more than 2 days.
(5) burn till step: described moulded pottery not yet put in a kiln to bake is warming up to 1400 ℃ burns till.
By the sintered silicon carbide material that above-mentioned steps makes, refractoriness＞1790 ℃, volume density is 2.3～2.4g/cm
3, apparent porosity is 18～23%, and cold crushing strength reaches 126～145Mpa, and burning till linear expansivity is-0.3～0.3%.
Embodiment 2
The andaluzite ore after fragmentation, ore dressing, superfine grinding, is obtained the andalusite micropowder of granularity＜30 μ m.Undertaken by following step then:
(1) batching step: described raw material is cooperated by following weight ratio:
Silicon-carbide particle material 0～0.1mm 75%
Andalusite micropowder 0～30 μ m 15%
Aluminum oxide powder 0～20 μ m 2%
Bonding clay 0～80 μ m 8%
Industrial phosphoric acid solution (adding) 10%
(2) batch mixing step: raw material is mixed and stirred 5～10 minutes by described proportioning, make it become uniform pug.
(3) forming step: described pug is made moulded pottery not yet put in a kiln to bake with high-pressure molding equipment or manual ramming method.
(4) drying step: described moulded pottery not yet put in a kiln to bake is dried more than 24 hours at 100～110 ℃, or natural air drying is more than 2 days.
(5) burn till step: described moulded pottery not yet put in a kiln to bake is warming up to 1420 ℃ burns till.
By the sintered silicon carbide material that above-mentioned steps makes, refractoriness＞1790 ℃, volume density is 2.2～2.3g/cm
3, apparent porosity is 19～25%, and cold crushing strength reaches 110～140Mpa, and burning till linear expansivity is＜0.2%.
The invention provides a kind of preparation method of sintered silicon carbide material.These method raw material sources are abundant, and technical process is simple, and can improve the bonding strength at silicon-carbide particle interface and the oxidation-resistance of silicon carbide effectively, product refractoriness height, and physical strength is big, and it is little to burn till volume change, and firing temperature is low, and is easy to implement to promote.The sintered silicon carbide material that the present invention obtained can be made into the goods of different shape, is used for furnace lining, kiln furnitures, refractory ceramics device and the grinding tool material of multiple high temperature kiln.
Claims (4)
1, a kind of preparation method of sintered silicon carbide material, it is characterized in that this method is that micro mist with silicon-carbide particle material and kyanite family mineral (comprising kyanite, andaluzite, three kinds of heteromorphism mineral of sillimanite) is a main raw material, adopt sintering process directly to prepare sintered silicon carbide material, and adopt following step to carry out:
(1) batching step: described silicon-carbide particle material is cooperated by following weight ratio with kyanite family mineral micro powder, bonding clay, binding agent:
Silicon-carbide particle material 0～0.1mm 65～90%
Kyanite family mineral micro powder 0～30 μ m 10～25%
Aluminum oxide powder 0～20 μ m 1～5%
Bonding clay 0～80 μ m 5～15%
Liquid-containing binder (external force adds) 8～12%
(2) batch mixing step: raw material is mixed and stirred 5～10 minutes by described proportioning, make it become uniform pug.
(3) forming step: described pug is made moulded pottery not yet put in a kiln to bake with high-pressure molding equipment or manual ramming method.
(4) drying step: described moulded pottery not yet put in a kiln to bake is dried more than 24 hours at 100～110 ℃, or natural air drying is more than 2 days.
(5) burn till step: described moulded pottery not yet put in a kiln to bake is warming up to 1350～1450 ℃ burns till.
2, the preparation method of sintered silicon carbide material according to claim 1 is characterized in that: silicon carbide, aluminum oxide powder, bonding clay and liquid-containing binder are the refractory raw material of industrial general.
3, the preparation method of sintered silicon carbide material according to claim 1, it is characterized in that: kyanite family mineral micro powder is that ore by kyanite family mineral is through fragmentation, adopt the micron-sized powder of the granularity＜30 μ m of conventional beneficiation method and conventional superfine grinding equipment acquisition, and kyanite family raw mineral materials can be only a kind of with in kyanite, andaluzite and three kinds of mineral of sillimanite, also two or three mineral in three kinds of mineral can be mixed and use.
4, the preparation method of sintered silicon carbide material according to claim 1 is characterized in that: sintered silicon carbide material can be a different shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99119733 CN1252397A (en) | 1999-09-28 | 1999-09-28 | Preparation of sintered silicon carbide material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99119733 CN1252397A (en) | 1999-09-28 | 1999-09-28 | Preparation of sintered silicon carbide material |
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|---|---|
| CN1252397A true CN1252397A (en) | 2000-05-10 |
Family
ID=5281065
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|---|---|---|---|
| CN 99119733 Pending CN1252397A (en) | 1999-09-28 | 1999-09-28 | Preparation of sintered silicon carbide material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383085C (en) * | 2006-03-10 | 2008-04-23 | 宁夏协成冶金制品有限公司 | Silicon carbide kiln furniture and preparation process thereof |
| CN101905973A (en) * | 2010-08-12 | 2010-12-08 | 中国人民解放军国防科学技术大学 | Gel injection molding process of advanced structural ceramic material |
| CN101386546B (en) * | 2008-10-14 | 2012-12-26 | 华南理工大学 | Self-reacting alumina-base composite ceramic mold core for fine casting and preparation method thereof |
| CN103567888A (en) * | 2012-07-31 | 2014-02-12 | 圣戈班研发（上海）有限公司 | Grinding tool with ceramic bonding agents and method for manufacturing grinding tool |
| CN108275969A (en) * | 2018-01-31 | 2018-07-13 | 景德镇陶瓷大学 | It is a kind of to utilize the mullite silicon carbide whisker composite ceramic material and preparation method thereof that natural minerals are raw material |
| CN108285350A (en) * | 2018-01-31 | 2018-07-17 | 景德镇陶瓷大学 | A kind of tri compound SiC based refractories and preparation method thereof |
| CN109020550A (en) * | 2018-08-20 | 2018-12-18 | 朝阳金工钒钛科技有限公司 | A kind of production method regenerating silicon carbide deacidizing tank |
-
1999
- 1999-09-28 CN CN 99119733 patent/CN1252397A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383085C (en) * | 2006-03-10 | 2008-04-23 | 宁夏协成冶金制品有限公司 | Silicon carbide kiln furniture and preparation process thereof |
| CN101386546B (en) * | 2008-10-14 | 2012-12-26 | 华南理工大学 | Self-reacting alumina-base composite ceramic mold core for fine casting and preparation method thereof |
| CN101905973A (en) * | 2010-08-12 | 2010-12-08 | 中国人民解放军国防科学技术大学 | Gel injection molding process of advanced structural ceramic material |
| CN101905973B (en) * | 2010-08-12 | 2012-05-30 | 中国人民解放军国防科学技术大学 | Gel injection molding process of advanced structural ceramic material |
| CN103567888A (en) * | 2012-07-31 | 2014-02-12 | 圣戈班研发（上海）有限公司 | Grinding tool with ceramic bonding agents and method for manufacturing grinding tool |
| CN108275969A (en) * | 2018-01-31 | 2018-07-13 | 景德镇陶瓷大学 | It is a kind of to utilize the mullite silicon carbide whisker composite ceramic material and preparation method thereof that natural minerals are raw material |
| CN108285350A (en) * | 2018-01-31 | 2018-07-17 | 景德镇陶瓷大学 | A kind of tri compound SiC based refractories and preparation method thereof |
| CN108275969B (en) * | 2018-01-31 | 2020-04-07 | 景德镇陶瓷大学 | Mullite-silicon carbide whisker composite ceramic material taking natural minerals as raw materials and preparation method thereof |
| CN108285350B (en) * | 2018-01-31 | 2020-05-29 | 景德镇陶瓷大学 | Ternary composite silicon carbide refractory material and preparation method thereof |
| CN109020550A (en) * | 2018-08-20 | 2018-12-18 | 朝阳金工钒钛科技有限公司 | A kind of production method regenerating silicon carbide deacidizing tank |
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