CN108276017B - It is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material and preparation method thereof - Google Patents
It is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material and preparation method thereof Download PDFInfo
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- CN108276017B CN108276017B CN201810098163.6A CN201810098163A CN108276017B CN 108276017 B CN108276017 B CN 108276017B CN 201810098163 A CN201810098163 A CN 201810098163A CN 108276017 B CN108276017 B CN 108276017B
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- 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
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Abstract
It is corundum-silicon carbide whisker composite ceramic material of raw material that the invention discloses a kind of using natural minerals, including base-material and bonding agent, the group of the base-material becomes 65~90wt% of aluminium silicate mineral, 10~35wt% of metallic aluminium powder, and the dosage of the bonding agent is 6~12wt% of base-material.In addition, also disclosing above-mentioned corundum-silicon carbide whisker composite ceramic material preparation method using natural minerals for raw material.The present invention uses natural minerals+metallic aluminium powder for material system, corundum and silicon carbide whisker are introduced by way of fabricated in situ, it solves the problems, such as that prior art industry powder and aggregate are not easy to mix, greatly improves corundum-silicon carbide composite ceramic materials performance.Raw material of the present invention is easy to get, simple process, firing temperature are low, high yield rate, is of great significance for improving corundum-silicon carbide composite ceramic materials quality and saving product cost, is conducive to promote and apply and the progress and development of industry technology.
Description
Technical field
The present invention relates to technical field of ceramic material more particularly to a kind of corundum-silicon carbide whisker composite ceramic material and
Preparation method.
Background technique
Corundum ceramic is as a kind of high-purity, fine grain material, because having high refractoriness, high rigidity, high intensity and chemistry lazy
It the advantages that property, is widely used for a long time.However, corundum ceramic since energy to failure is lower, keep its unbearable by
The thermal stress caused by rapid heat cycle, therefore it is easy to cause fracture, to constrain its answering in some thermal structure fields
With.And silicon carbide has many advantages, such as high heat conductance, high intensity and high-heat resistance shock resistant, can make up the deficiency of corundum material, therefore
Silicon carbide combined corundum material is the diphase ceramic material for combining the two advantage, is had in fields such as refractory material, grinding-materials
It is widely used.
Currently, the preparation of prior art corundum-silicon carbide whisker composite ceramic material, mainly with commercial grade silicon carbide silicon powder
It is mixed into carborundum powder that is, using schmigel as aggregate for raw material with schmigel and is modified.This material system is in the prevalence of original
Expect the problems such as at high cost, mixing is irregular, performance is uneven；Even if also there is research to introduce carbonization by the way of fabricated in situ whisker
Silicon, but what silicon source and silicon source still selected is industrial raw material, and not only product cost is high, but also not easily molded, finished product rate
It is low.
Summary of the invention
It is the corundum-of raw material that it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of using natural minerals
Silicon carbide whisker composite ceramic material uses natural minerals+metallic aluminium powder for material system, is drawn in a manner of fabricated in situ by will pass through
Enter corundum and silicon carbide whisker, and obtains the silicon carbide combined corundum material of high-performance, low cost.Another object of the present invention exists
In provide it is above-mentioned using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material preparation method.
The purpose of the present invention is achieved by the following technical programs:
It is provided by the invention it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, including
The group of base-material and bonding agent, the base-material becomes 65~90wt% of aluminium silicate mineral, 10~35wt% of metallic aluminium powder, the knot
The dosage of mixture is 6~12wt% of base-material.
Further, aluminium silicate mineral of the present invention is kaolin, in andalusite, sillimanite, kyanite, bauxite
One kind or two kinds combination.
Further, the granularity of aluminium silicate mineral of the present invention is 180~250 mesh；The granularity of the metallic aluminium powder
For 180~325 mesh.
In above scheme, bonding agent of the present invention is the PVA solution of concentration 5wt%.
Another object of the present invention is achieved by the following technical programs:
It is provided by the invention it is above-mentioned using natural minerals be raw material the preparation of corundum-silicon carbide whisker composite ceramic material
Method is as follows: after the base-material is mixed, bonding agent is added and is uniformly mixed；The green compact obtained after compression moulding, drying, are buried
Powder sintering, the powder embedded sintering use carbon source material, corundum-silicon carbide whisker composite ceramic material are obtained after firing.
Further, its moisture content of green compact < 0.5% after drying described in preparation method of the present invention.
In above scheme, carbon source material described in preparation method of the present invention is one of graphite powder, powdered carbon, carbon black or two kinds
Combination.The sintering temperature is 1400~1600 DEG C, and firing time is 1~2h.
The invention has the following advantages:
(1) present invention uses natural aluminosilicate mineral+metallic aluminium powder material system, utilizes metallic aluminium powder and titanium dioxide
The reaction of silicon displaces metallic silicon；Remaining aluminium oxide fabricated in situ obtains corundum in metallic aluminium powder and aluminium silicate mineral.And
Metallic silicon forms liquid phase in sintering process can promote sintering, and reacts and synthesize with the Carbon Monoxide in situ in protective atmosphere
To silicon carbide whisker, which is evenly distributed between corundum in granules, to efficiently solve prior art industry powder
It is not easy the problem of mixing with aggregate, greatly improves corundum-silicon carbide whisker composite ceramic material performance.
(2) present invention mainly uses natural minerals, has good plasticity, helps to improve processability, thus
The yield rate of product can be significantly improved；Also, the advantages such as natural minerals used are big with reserves, distribution is wide, cheap, have
Help reduce product cost.Metallic aluminium powder used has lower fusing point, can form solution dispersion in lower firing temperature
In green body, material sintering is not only contributed to, while being also beneficial to solve the problems, such as performance unevenness.
(3) corundum of fabricated in situ of the present invention-silicon carbide whisker composite ceramic material, thermal shock resistance is good, firing is shunk
Low, high mechanical strength, main performance index are as follows: < 2%, thermal conductivity > are shunk in natural minerals additive amount >=50%, firing
8W/ (mK), flexural strength >=70MPa, 1100 DEG C~room temperature anti-thermal shock recycle do not crack for 30 times, that 1h is kept the temperature at 1400 DEG C is not soft
Change indeformable.
(4) raw material of the present invention be easy to get, simple process, firing temperature it is low, and for improving corundum-carbide composite ceramic
The quality and saving product cost of material are of great significance, thus have a vast market foreground, and are conducive to promote and apply
With the progress and development of industry technology.
Detailed description of the invention
Below in conjunction with embodiment and attached drawing, the present invention is described in further detail:
Fig. 1 is corundum obtained by the embodiment of the present invention-silicon carbide whisker composite ceramic material section micro-structure diagram
(scanning electron microscope secondary electron image).
Specific embodiment
Embodiment one:
1, the present embodiment it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, including base
The group of material and bonding agent, base-material becomes kaolin (250 mesh) 65wt%, metallic aluminium powder (180 mesh) 35wt%, and bonding agent is concentration
The PVA solution of 5wt%, dosage are the 8wt% of base-material.
2, the present embodiment is a kind of as follows using corundum-silicon carbide whisker composite ceramic material that natural minerals are raw material:
After above-mentioned base-material is mixed, bonding agent is added and is uniformly mixed；After agitated, ageing mixture, selected according to product size suitable
When pressure compression moulding, dried at a temperature of 110 DEG C and obtain green compact (entering kiln moisture < 0.5%)；Then it layings of markstone ink powder, In
It is burnt into 2h at a temperature of 1450 DEG C, obtains corundum-silicon carbide whisker composite ceramic material.
Embodiment two:
1, the present embodiment it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, including base
The group of material and bonding agent, base-material becomes kaolin (250 mesh) 40wt%, bauxite (180 mesh) 40wt%, metallic aluminium powder (325
Mesh) 20wt%, bonding agent is the PVA solution of concentration 5wt%, and dosage is the 6wt% of base-material.
2, the present embodiment is a kind of as follows using corundum-silicon carbide composite ceramic materials that natural minerals are raw material:
After above-mentioned base-material is mixed, bonding agent is added and is uniformly mixed；After agitated, ageing mixture, selected according to product size suitable
When pressure compression moulding, dried at a temperature of 110 DEG C and obtain green compact (entering kiln moisture < 0.5%)；Then buried charcoal powder, In
It is burnt into 2h at a temperature of 1500 DEG C, obtains corundum-silicon carbide whisker composite ceramic material.
Embodiment three:
1, the present embodiment it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, including base
The group of material and bonding agent, base-material becomes kaolin (250 mesh) 30wt%, andalusite (180 mesh) 40wt%, metallic aluminium powder (325
Mesh) 30wt%, bonding agent is the PVA solution of concentration 5wt%, and dosage is the 8wt% of base-material.
2, the present embodiment is a kind of as follows using corundum-silicon carbide whisker composite ceramic material that natural minerals are raw material:
After above-mentioned base-material is mixed, bonding agent is added and is uniformly mixed；After agitated, ageing mixture, selected according to product size suitable
When pressure compression moulding, dried at a temperature of 110 DEG C and obtain green compact (entering kiln moisture < 0.5%)；Then it layings of markstone ink powder, In
It is burnt into 2h at a temperature of 1550 DEG C, obtains corundum-silicon carbide whisker composite ceramic material.
Example IV:
1, the present embodiment it is a kind of using natural minerals be raw material corundum-silicon carbide composite ceramic materials, including base-material and
The group of bonding agent, base-material becomes kyanite (250 mesh) 40wt%, sillimanite (250 mesh) 25wt%, metallic aluminium powder (325 mesh)
35wt%, bonding agent are the PVA solution of concentration 5wt%, and dosage is the 8wt% of base-material.
2, the present embodiment is a kind of as follows using corundum-silicon carbide whisker composite ceramic material that natural minerals are raw material:
After above-mentioned base-material is mixed, bonding agent is added and is uniformly mixed；After agitated, ageing mixture, selected according to product size suitable
When pressure compression moulding, dried at a temperature of 110 DEG C and obtain green compact (entering kiln moisture < 0.5%)；Then it layings of markstone ink powder, In
It is burnt into 1h at a temperature of 1600 DEG C, obtains corundum-silicon carbide whisker composite ceramic material.
Embodiment five:
1, the present embodiment it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, including base
The group of material and bonding agent, base-material becomes kaolin (250 mesh) 40wt%, kyanite (180 mesh) 32wt%, metallic aluminium powder (325
Mesh) 28wt%, bonding agent is the PVA solution of concentration 5wt%, and dosage is the 8wt% of base-material.
2, the present embodiment is a kind of as follows using corundum-silicon carbide whisker composite ceramic material that natural minerals are raw material:
After above-mentioned base-material is mixed, bonding agent is added and is uniformly mixed；After agitated, ageing mixture, selected according to product size suitable
When pressure compression moulding, dried at a temperature of 110 DEG C and obtain green compact (entering kiln moisture < 0.5%)；Then carbon black powder, In are buried
It is burnt into 2h at a temperature of 1580 DEG C, obtains corundum-silicon carbide whisker composite ceramic material.
Embodiment six:
1, the present embodiment it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, including base
The group of material and bonding agent, base-material becomes kaolin (250 mesh) 50wt%, sillimanite (180 mesh) 25wt%, metallic aluminium powder (325
Mesh) 25wt%, bonding agent is the PVA solution of concentration 5wt%, and dosage is the 7wt% of base-material.
2, the present embodiment is a kind of as follows using corundum-silicon carbide whisker composite ceramic material that natural minerals are raw material:
After above-mentioned base-material is mixed, bonding agent is added and is uniformly mixed；After agitated, ageing mixture, selected according to product size suitable
When pressure compression moulding, dried at a temperature of 110 DEG C and obtain green compact (entering kiln moisture < 0.5%)；Then it layings of markstone ink powder, In
It is burnt into 2h at a temperature of 1400 DEG C, obtains corundum-silicon carbide whisker composite ceramic material.
Embodiment seven:
1, the present embodiment it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, including base
The group of material and bonding agent, base-material becomes sillimanite (250 mesh) 60wt%, bauxite (180 mesh) 10wt%, metallic aluminium powder (325
Mesh) 30wt%, bonding agent is the PVA solution of concentration 5wt%, and dosage is the 8wt% of base-material.
2, the present embodiment is a kind of as follows using corundum-silicon carbide whisker composite ceramic material that natural minerals are raw material:
After above-mentioned base-material is mixed, bonding agent is added and is uniformly mixed；After agitated, ageing mixture, selected according to product size suitable
When pressure compression moulding, dried at a temperature of 110 DEG C and obtain green compact (entering kiln moisture < 0.5%)；Then buried charcoal powder, In
It is burnt into 2h at a temperature of 1560 DEG C, obtains corundum-silicon carbide whisker composite ceramic material.
As shown in Figure 1, corundum made from the embodiment of the present invention-silicon carbide whisker composite ceramic material, the carbon of fabricated in situ
SiClx whisker is evenly distributed between corundum in granules, can play the work for improving thermal conductivity, flexural strength and thermal shock resistance
With.
Claims (6)
1. it is a kind of using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material, it is characterised in that: including base-material
And bonding agent, the group of the base-material become 65~90 wt% of aluminium silicate mineral, 10~35 wt% of metallic aluminium powder, the bonding agent
Dosage be base-material 6~12 wt%；The aluminium silicate mineral is kaolin, andalusite, sillimanite, kyanite, bauxite
One of or two kinds combination；The bonding agent is the PVA solution of 5 wt% of concentration；After the base-material is mixed with bonding agent, carry out
Compression moulding, drying, powder embedded sintering, the powder embedded sintering use carbon source material, obtain corundum-silicon carbide whisker composite ceramics material
Material.
2. according to claim 1 is corundum-silicon carbide whisker composite ceramic material of raw material using natural minerals, special
Sign is: the granularity of the aluminium silicate mineral is 180~250 mesh；The granularity of the metallic aluminium powder is 180~325 mesh.
3. it is as claimed in claim 1 or 2 using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material preparation side
Method, it is characterised in that: after mixing the base-material, bonding agent is added and is uniformly mixed；The green compact obtained after compression moulding, drying,
Powder embedded sintering is carried out, the powder embedded sintering uses carbon source material, corundum-silicon carbide whisker composite ceramics material is obtained after firing
Material.
4. it is according to claim 3 using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material system
Preparation Method, it is characterised in that: its moisture content of green compact < 0.5% after the drying.
5. it is according to claim 3 using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material system
Preparation Method, it is characterised in that: the carbon source material is one of graphite powder, powdered carbon, carbon black or two kinds of combinations.
6. it is according to claim 3 using natural minerals be raw material corundum-silicon carbide whisker composite ceramic material system
Preparation Method, it is characterised in that: the sintering temperature is 1400~1600 DEG C, and firing time is 1~2h.
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| CN110590334A (en) * | 2019-10-09 | 2019-12-20 | 景德镇陶瓷大学 | Silicon carbide whisker in-situ composite lithium ceramic material and preparation method thereof |
| CN110526698A (en) * | 2019-10-09 | 2019-12-03 | 景德镇陶瓷大学 | A kind of cordierite heat resisting porcelain of highly thermally conductive highly heatproof and shockproof and preparation method thereof |
| CN115724689B (en) * | 2022-11-21 | 2023-05-26 | 景德镇陶瓷大学 | Low-temperature in-situ synthesis method of silicon carbide whisker coated surface modified cordierite honeycomb ceramic and product prepared by same |
| CN115724684B (en) * | 2022-11-21 | 2023-05-26 | 景德镇陶瓷大学 | Low-temperature in-situ synthesis method of SiC nanofiber coating modified mullite honeycomb ceramic and product prepared by same |
| CN115959921B (en) * | 2022-11-21 | 2023-09-15 | 景德镇陶瓷大学 | Low-temperature in-situ synthesis method of mullite honeycomb ceramic with surface modified by silicon nitride whisker film layer and product prepared by low-temperature in-situ synthesis method |
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| CN102503472B (en) * | 2011-10-26 | 2013-06-05 | 河南省耕生耐火材料有限公司 | SiC (silicon carbide)-toughened corundum prefabricated part by means of in-situ formation and preparation method for same |
| CN102503473B (en) * | 2011-10-26 | 2014-10-01 | 河南省耕生耐火材料有限公司 | High-aluminum prefabricated part toughened by in-situ generated SiC and preparation method thereof |
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