CN103145429A - Aluminum titanate matrix complex-phase ceramic fireproof material - Google Patents
Aluminum titanate matrix complex-phase ceramic fireproof material Download PDFInfo
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- CN103145429A CN103145429A CN2013100810663A CN201310081066A CN103145429A CN 103145429 A CN103145429 A CN 103145429A CN 2013100810663 A CN2013100810663 A CN 2013100810663A CN 201310081066 A CN201310081066 A CN 201310081066A CN 103145429 A CN103145429 A CN 103145429A
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Abstract
The invention provides an aluminum titanate matrix complex-phase ceramic fireproof material. The complex-phase ceramic fireproof material is characterized by comprising the following components in percentage by weight: 50-60wt% of corundum, 30-35wt% of clay and 10-15wt% of titanium dioxide; the corundum comprises 95-100wt% of alpha-Al2O3; the purity of the titanium dioxide is 95-100%; and the clay comprises the following components in percentage by weight: 40-54wt% of SiO2, 30-36wt% of Al2O3, 0.5-2wt% of Fe2O3, 0.1-1.0wt% of K2O, 0.5-1wt% of Na2O, 0-7wt% of other components and 12-15wt% of L.O.L. The complex-phase ceramic fireproof material has the characteristics of high strength, hard deformation, good heat stability and high usage temperature.
Description
[technical field]
The present invention relates to a kind of diphase ceramic material field, particularly a kind of aluminium titanates matrix complex phase ceramic refractory materials.
[background technology]
Aluminium titanates is a kind of stupalith commonly used, and its chemical formula is Al
2TiO
5Aluminium titanates has the characteristics such as thermal expansivity, low thermal conductivity, high-melting-point, anti-thermal shock and thermal shock resistance excellence close to zero, can use under violent rapid heat cycle condition, and aluminium liquid, molten steel, copper liquid, copper ashes, slag had good anti-erosion and alkali corrosion resistance, be a kind of stupalith of excellent property, can be widely used in the furnace lining material of heat-resisting, anti-thermal shock, anticorrosive, alkali resistant etc.
Aluminium titanates is also encountered two problems in concrete the application, and the one, it easily is decomposed into rutile and corundum in the temperature range of 750-1300 ℃, cause the material internal stress concentration, thereby loses its low thermal expansion characteristics, and the materials'use life-span is shortened greatly; The 2nd, its each axial thermal expansion coefficient difference is very large, forms a large amount of tiny cracks at material internal because thermal stresses is easy when cooling, and its physical strength is reduced, and material is difficult to dense sintering.
In recent years, by the compound phase method, add additive to improve the research study hotspot that becomes in the field of business of alumina titanate ceramics intensity.The equal metal particles of the aluminium titanate composite material of preparation strengthens ceramic composite by this method, and disperse is evenly distributed in matrix at the Second Phase Particle of aluminium titanate base material, and active interaction does not occur for matrix phase and disperse phase.Because itself there is a large amount of tiny cracks in the aluminium titanate base material, by adding the ceramic particle of other material, can the crack tip in expansion be played " nail is solid " effect, make it be difficult to expand forward the expansion or make crackle deflection of maybe can only detouring, or make crackle branching, or make crackle crooked, thereby increase the energy-to-break of material, prevent the whole ceramic structure of main penetration of cracks, can suppress grain growing when high temperature is synthetic simultaneously, the strength of materials is obviously improved.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of aluminium titanates matrix complex phase ceramic refractory materials, and this complex phase ceramic refractory materials has that intensity is high, not yielding, Heat stability is good and use temperature high.
The present invention is achieved in that
A kind of aluminium titanates matrix complex phase ceramic refractory materials, described each component of complex phase ceramic refractory materials and content thereof are as follows: corundum 50～60wt%, clay 30～35wt%, titanium dioxide 10～15wt%.
Further, the content of described each component of complex phase ceramic refractory materials is specific as follows: corundum 57wt%, clay 31wt%, titanium dioxide 12wt%.
Further, described corundum contains α-Al
2O
3Amount is 95～100wt%, and described titanium dioxide purity is 95～100%, and each component and the content thereof of described clay are respectively: SiO
2Component 40～54wt%, Al
2O
3Component 30～36wt%, Fe
2O
3Component 0.5～2wt%, K
2O component 0.1～1.0wt%, Na
2O component 0.5～1wt%, other components 0～7wt%, L.O.I component 12～15wt%.
Further, described corundum contains α-Al
2O
3Amount is 97.5wt%, and described titanium dioxide purity is 98.20%, and each component and the content thereof of described clay are respectively: SiO
2Component 47.58wt%, Al
2O
3Component 36.00wt%, Fe
2O
3Component 0.80wt%, K
2O component 0.12wt%, Na
2O component 0.5wt%, other components 0wt%, L.O.I component 15.00wt%.
The present invention has following advantage:
The present invention is take corundum, clay, titanium dioxide as raw material, and wherein corundum can improve composite diphase material refractoriness and load softening point temperature; Mullite can improve the composite diphase material high temperature creep resistance and increase the hot strength of material, can suppress again the decomposition of aluminium titanates; Aluminium titanates high-melting-point and low thermal coefficient of expansion can effectively improve the composite diphase material thermostability.Therefore invention has that refractoriness is high, Properties of High Temperature Creep good, low thermal coefficient of expansion, use temperature be high, the characteristics such as good thermal shock stability and long service life, and it can be applicable in the industries such as pottery, metallurgy, chemical industry, electronics.
[description of drawings]
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the scanning electron microscope diagram of the embodiment of the present invention one.
Fig. 2 is the scanning electron microscope diagram of the embodiment of the present invention two.
[embodiment]
See also illustrated in figures 1 and 2ly, embodiments of the invention are described in detail.
The present invention relates to a kind of aluminium titanates matrix complex phase ceramic refractory materials, described each component of complex phase ceramic refractory materials and content thereof are as follows: corundum 50～60wt%, clay 30～35wt%, titanium dioxide 10～15wt%.
More excellent, the content of described each component of complex phase ceramic refractory materials is specific as follows: corundum 57wt%, clay 31wt%, titanium dioxide 12wt%.
Described corundum contains α-Al
2O
3Amount is 95～100wt%, described titanium dioxide (TiO
2) purity is 95～100%, each component and the content thereof of described clay are respectively: SiO
2Component 40～54wt%, Al
2O
3Component 30～36wt%, Fe
2O
3Component 0.5～2wt%, K
2O component 0.1～1.0wt%, Na
2O component 0.5～1wt%, other components 0～7wt%, L.O.I(loss on ignition) component 12～15wt%.
More excellent, described corundum contains α-Al
2O
3Amount is 97.5wt%, and described titanium dioxide purity is 98.20%, and each component and the content thereof of described clay are respectively: SiO
2Component 47.58wt%, Al
2O
3Component 36.00wt%, Fe
2O
3Component 0.80wt%, K
2O component 0.12wt%, Na
2O component 0.5wt%, other components 0wt%, L.O.I component 15.00wt%.
Below in conjunction with embodiment, the present invention is further described.
Embodiment one
1. component formula
In the complex phase ceramic refractory materials, each component concentration is: corundum 57wt%, clay 31wt%, titanium dioxide 12wt%; Wherein corundum contains α-Al
2O
3Amount is 97.50wt%, and titanium dioxide purity is 98.20%, and the chemical composition of clay is SiO
2Component 47.58wt%, Al
2O
3Component 36.00wt%, Fe
2O
3Component 0.80wt%, K
2O component 0.12wt%, Na
2O component 0.50wt%, other components 0wt%, L.O.I component 15.00wt%.
2. preparation method
Preparation 10Kg complex phase ceramic refractory materials sample, concrete steps are as follows:
1) batching: utilize electronic balance, various raw materials and additive are mixed, stir according to above-mentioned ratio, cross 20 mesh sieves.
2) wet-milling: adopt planetary high-energy ball mill to grind, material, ball, water ratio are 1:2:1,200 rev/mins of rotating speeds.
3) old: the standing 24h of the slurry after grinding, allow raw material and water stratification, be convenient to oven dry, improve blank forming performance and blank strength.
4) oven dry: electricity consumption hot-blast thermostatic drying chamber oven dry slurry, bake out temperature is 100 ± 5 ℃.
5) sieve: the raw material after oven dry carries out fragmentation, crosses 100 mesh sieves, better moulding.
6) moulding: add organic bond polyvinyl alcohol and a small amount of water in the raw material after sieving, the mixed material that evenly makes has certain plasticity-and viscosity.Raw material is dry-pressing formed with mould half.
7) calcining: adopt at high temperature (1510 ± 10 ℃) calcining of electric furnace.
8) cooling: be fired to temperature required, the insulation 4h, the outage after naturally cooling.
3. sample performance characterizes
1) crystal phase analysis
The XRD analysis data results of sample shows, said sample formation 3 kinds of crystalline phases, i.e. corundum phase α-Al
2O
3, mullite solid solution Al
4.59Si
1.41O
9.7With aluminium titanates Al mutually
2TiO
5, its content is respectively 23.41wt%, 49.96wt%, 26.63wt%, wherein Al
4.59Si
1.41O
9.7Be principal crystalline phase.Al
4.59Si
1.41O
9.7By two the step form, the first step forms with textural defect mullite Al by solid state reaction
2O
3SiO
2Second step is the mullite Al with textural defect
2O
3SiO
2With the superfluous α-Al of reaction
2O
3Form substitutional solid solution Al
4.59Si
1.41O
9.7, i.e. α-Al
2O
3In Al
3+Displacement Al
2O
3SiO
2In [SiO
4] Si in tetrahedron
4+Form sosoloid.
2) unit cell parameters characterizes
Adopt unit cell parameters and the variation thereof of crystalline phase in Philips X ' plus software analysis and definite each sample.The mullite solid solution phase, the corundum phase (α-Al that determine
2O
3Phase) list in respectively in table 1,2 and 3 with aluminium titanates unit cell parameters mutually:
Table 1 mullite phase unit cell parameters
| a（nm） | b（nm） | c（nm） | V（nm 3） | α | β | γ | Crystallographic system |
| 0.75720 | 0.77039 | 0.28940 | 0.16882 | 90 | 90 | 90 | Tiltedly square |
Table 2 corundum phase unit cell parameters
| a（nm） | b（nm） | c（nm） | V（nm 3） | α | β | γ | Crystallographic system |
| 0.47607 | 0.47607 | 1.2998 | 0.25512 | 90 | 90 | 120 | The tripartite |
Table 3 aluminium titanates phase unit cell parameters
| a（nm） | b（nm） | c（nm） | V（nm 3） | α | β | γ | Crystallographic system |
| 0.35914 | 0.94509 | 0.96617 | 0.32794 | 90 | 90 | 90 | Tiltedly square |
3) sem analysis
Sample SEM schemes as shown in Figure 1, and mullite solid solution is column, and crystal is obviously grown up, and can consist of incomplete network structure, and structure is tightr, and glassy phase obviously reduces, and the intensity of sample is higher, better heat stability, and pattern is more satisfactory.
4) performance analysis
The correlated performance of test sample, its folding strength are that 39.60MPa, thermal shock intensity are that 26.24MPa, 1 thermal shock intensity folding strength conservation rate are 66.38%, water-intake rate is 7.40%, apparent porosity is 20.06%, volume density is 2.71g/cm
3
Embodiment two
1. component formula
In the complex phase ceramic refractory materials, each component concentration is: corundum 57wt%, clay 33wt%, titanium dioxide 10wt%; Wherein corundum contains α-Al
2O
3Amount is 97.50%, and titanium dioxide purity is 98.20%, and the chemical composition of clay is SiO
2Component 53.96wt%, Al
2O
3Component 30.20wt%, Fe
2O
3Component 1.52wt%, K
2O component 1.02wt%, Na
2O component 0.50wt%, other components 0.20wt%, L.O.I component 12.60wt%.
2. preparation method
The preparation method is with embodiment one.
3. sample performance characterizes
1) crystal phase analysis
The XRD analysis data results of said sample shows, sample formation 3 kinds of crystalline phases, i.e. corundum phase α-Al
2O
3, mullite solid solution Al
4.59Si
1.41O
9.7With aluminium titanates Al mutually
2TiO
5, its content is respectively 20.07wt%, 56.91wt%, 23.02wt%, wherein Al
4.59Si
1.41O
9.7Be principal crystalline phase.
2) unit cell parameters characterizes
Adopt unit cell parameters and the variation thereof of crystalline phase in Philips X ' plus software analysis and definite each sample.The mullite solid solution phase, the corundum phase (α-Al that determine
2O
3Phase) list in respectively in table 4,5 and 6 with aluminium titanates unit cell parameters mutually:
Table 4 mullite phase unit cell parameters
| a（nm） | b（nm） | c（nm） | V（nm 3） | α | β | γ | Crystallographic system |
| 0.75704 | 0.77022 | 0.28936 | 0.16872 | 90 | 90 | 90 | Tiltedly square |
Table 5 corundum phase unit cell parameters
| a（nm） | b（nm） | c（nm） | V（nm 3） | α | β | γ | Crystallographic system |
| 0.47600 | 0.47600 | 1.2995 | 0.25499 | 90 | 90 | 120 | The tripartite |
Table 6 aluminium titanates phase unit cell parameters
| a（nm） | b（nm） | c（nm） | V（nm 3） | α | β | γ | Crystallographic system |
| 0.35893 | 0.94510 | 0.96640 | 0.32783 | 90 | 90 | 90 | Tiltedly square |
3) sem analysis
Sample SEM schemes as shown in Figure 2, and mullite solid solution is column, and crystal is obviously grown up, and can consist of incomplete network structure, and structure is tightr, and glassy phase obviously reduces, and the intensity of sample is higher, better heat stability, and pattern is more satisfactory.
4) performance analysis
The correlated performance of test sample, its folding strength are that 37.31MPa, thermal shock intensity are that 25.43MPa, 1 thermal shock intensity folding strength conservation rate are 67.80%, water-intake rate is 8.58%, apparent porosity is 22.40%, volume density is 2.61g/cm
3
The above results shows that invention has that refractoriness is high, Properties of High Temperature Creep good, low thermal coefficient of expansion, use temperature are high, the characteristics such as good thermal shock stability and long service life, and it can be applicable in the industries such as pottery, metallurgy, chemical industry, electronics.
The present invention is take corundum, clay, titanium dioxide as raw material, and wherein corundum can improve composite diphase material refractoriness and load softening point temperature; Mullite can improve the composite diphase material high temperature creep resistance and increase the hot strength of material, can suppress again the decomposition of aluminium titanates; Aluminium titanates high-melting-point and low thermal coefficient of expansion can effectively improve the composite diphase material thermostability.
Although more than described the specific embodiment of the present invention; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than for the restriction to scope of the present invention; those of ordinary skill in the art are in modification and the variation of the equivalence of doing according to spirit of the present invention, all should be encompassed in the scope that claim of the present invention protects.
Claims (4)
1. aluminium titanates matrix complex phase ceramic refractory materials, it is characterized in that: described each component of complex phase ceramic refractory materials and content thereof are as follows: corundum 50～60wt%, clay 30～35wt%, titanium dioxide 10～15wt%.
2. a kind of aluminium titanates matrix complex phase ceramic refractory materials as claimed in claim 1, it is characterized in that: the content of described each component of complex phase ceramic refractory materials is specific as follows: corundum 57wt%, clay 31wt%, titanium dioxide 12wt%.
3. a kind of aluminium titanates matrix complex phase ceramic refractory materials as claimed in claim 1 or 2, it is characterized in that: described corundum contains α-Al
2O
3Amount is 95～100wt%, and described titanium dioxide purity is 95～100%, and each component and the content thereof of described clay are respectively: SiO
2Component 40～54wt%, Al
2O
3Component 30～36wt%, Fe
2O
3Component 0.5～2wt%, K
2O component 0.1～1.0wt%, Na
2O component 0.5～1wt%, other components 0～7wt%, L.O.I component 12～15wt%.
4. a kind of aluminium titanates matrix complex phase ceramic refractory materials as claimed in claim 3, it is characterized in that: described corundum contains α-Al
2O
3Amount is 97.5wt%, and described titanium dioxide purity is 98.20%, and each component and the content thereof of described clay are respectively: SiO
2Component 47.58wt%, Al
2O
3Component 36.00wt%, Fe
2O
3Component 0.80wt%, K
2O component 0.12wt%, Na
2O component 0.5wt%, other components 0wt%, L.O.I component 15.00wt%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396706A (en) * | 2013-08-27 | 2013-11-20 | 汤炼芳 | High-temperature far-infrared coating and preparation method thereof |
| CN103396705A (en) * | 2013-08-27 | 2013-11-20 | 汤炼芳 | Anti-oxidation coating and preparation method thereof |
| CN111747761A (en) * | 2020-06-19 | 2020-10-09 | 北京科技大学 | Titanium-reinforced corundum refractory material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891454A (en) * | 2010-06-25 | 2010-11-24 | 夏卫平 | Corundum-aluminum titanate crucible and preparation technology thereof |
-
2013
- 2013-03-14 CN CN2013100810663A patent/CN103145429A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891454A (en) * | 2010-06-25 | 2010-11-24 | 夏卫平 | Corundum-aluminum titanate crucible and preparation technology thereof |
Non-Patent Citations (1)
| Title |
|---|
| 谢志煌等: "利用铝材厂污泥研制刚玉/莫来石/钛酸铝复相材料", 《中国陶瓷》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396706A (en) * | 2013-08-27 | 2013-11-20 | 汤炼芳 | High-temperature far-infrared coating and preparation method thereof |
| CN103396705A (en) * | 2013-08-27 | 2013-11-20 | 汤炼芳 | Anti-oxidation coating and preparation method thereof |
| CN111747761A (en) * | 2020-06-19 | 2020-10-09 | 北京科技大学 | Titanium-reinforced corundum refractory material and preparation method thereof |
| CN111747761B (en) * | 2020-06-19 | 2021-06-11 | 北京科技大学 | Titanium-reinforced corundum refractory material and preparation method thereof |
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Application publication date: 20130612 |