CN108640659A - A kind of preparation method of novel oxidized aluminium nanocomposite - Google Patents
A kind of preparation method of novel oxidized aluminium nanocomposite Download PDFInfo
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- CN108640659A CN108640659A CN201810356105.9A CN201810356105A CN108640659A CN 108640659 A CN108640659 A CN 108640659A CN 201810356105 A CN201810356105 A CN 201810356105A CN 108640659 A CN108640659 A CN 108640659A
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- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- 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
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- 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
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- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/666—Applying a current during sintering, e.g. plasma sintering [SPS], electrical resistance heating or pulse electric current sintering [PECS]
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Abstract
The invention discloses a kind of preparation methods of novel oxidized aluminium nanocomposite, include the following steps：Wear-resistant ceramic fission mixes, and includes the Al of 90 95% weight2O3, the talcum of 1 3% weight, the CaCO of 2% weight3, the clay of 5% weight, the B of 0.6 1.2% weight2O, remaining is adhesive；Ball milling is dried using drying machine, is granulated, and compression moulding；Flash burning sample；Macro property detects；Micro-analysis；Theoretical calculation and guides engineer application.The present invention has the characteristics that high-efficiency low energy consumption sintering temperature is low, sintering velocity is fast, the Isothermal sinter time is short, and sintered product consistency is high, the features such as need not adding sintering aid.
Description
Technical field
The present invention relates to the preparation methods of nanocomposite, nano combined in particular to a kind of novel oxidized aluminium
The preparation method of material.
Background technology
Great demand of the equipment manufacture to high-end wearing piece.The energy and material consumption caused by being worn due to material are increased
Economic loss Deng caused by is quite surprising.
Such as cyclone dust collectors, including cylinder, cylinder side wall upper part be provided with air inlet pipe, be arranged on cylinder roof
There are exhaust pipe, cylinder lower part to be provided with ash bucket, hopper bottom is provided with cinder-discharging port.The cyclone dust collectors of the structure, rotary pneumatic
Stream is contacted with wall, and dust just loses inertia force and falls along wall surface, and into ash releasing tube, a part of dust accumulation is in ash bucket siding
On.Continue shape flowing of from bottom to top spinning when swirling eddy reaches hopper bottom, deduster is discharged through exhaust pipe in evolution gas.
But drive and siding friction of the dust stratification on ash bucket siding due to swirling eddy, being seriously worn for ash bucket siding can be caused.Cause
This, cyclone dust collectors cylinder common used material is high-quality high-alloy wear-resisting steel or alumina ceramic composite material.
Aluminium oxide ceramics is one kind with aluminium oxide (Al2O3) based on ceramic material, be used for thick film integrated circuit.Oxidation
Aluminium ceramics have preferable conductibility, mechanical strength and heat-resisting quantity.It should be noted that need to be washed with ultrasonic wave.Aluminium oxide
Ceramics are a kind of widely used ceramics, because its superior performance, more and more extensive in the application of modern society, are met
In daily and property needs.
Aluminium oxide ceramics is divided into two kinds of high-purity type and plain edition.
High-purity type aluminium oxide ceramics system Al2O3Ceramic material of the content 99.9% or more, since its sintering temperature is up to
1650-1990 DEG C, transmission peak wavelength is 1~6 μm, is made generally in melten glass to replace platinum crucible；Using its translucency and it is resistant to
Alkali metal corrosivity is used as sodium vapor lamp pipe；It can be used as ic substrate and high-frequency insulation material in the electronics industry.
Al presses in plain edition aluminium oxide ceramics system2O3Content difference is divided into the kinds such as 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain, sometimes
Al2O3Content also divides common aluminium oxide ceramics series into 80% or 75%.Wherein 99 alumina ceramics materials are for making high temperature
Crucible, fire resisting boiler tube and special wear-resistant material, such as ceramic bearing, ceramic seal and water valve plate；95 alumina ceramics are mainly used
Make corrosion-resistant, wear parts；Due to often mixing part talcum in 85 porcelain, improve electrical property and mechanical strength, can with molybdenum, niobium,
The metal sealings such as tantalum, some are used as electrovacuum device device.
Aluminium oxide ceramics includes often with preparation method
1) normal pressure-sintered, have the advantages that simple for process, but sintering temperature high (1600 DEG C or so), energy consumption are big, cause
Densification time length (2h) product qualification rate is low, manufacturing cost is high.
2) centrifugal SHS, has that reaction temperature is high, product purity is high, wear-resistant, high temperature resistant and corrosion-resistant
Etc. performances it is good the advantages that, but hole and crackle are more, and yield rate is low, and performance is poor.
3) hot pressed sintering, though sintering temperature can reduce by 200 DEG C -300 DEG C, consistency increases, the mechanical property of material carries
Height, but still higher (the 1300 DEG C or so) shape of product of sintering temperature is simple, must carry out post-processing, low production efficiency.
4) hot isostatic pressing, advantage is relatively low sintering temperature, uniform microstructure, functional, the disadvantage is that need to biscuit into
Row is encapsulated or is pre-sintered, pressure condition is harsher, low production efficiency.
5) discharge plasma sintering, with sintering temperature is low, sintering time is short, crystal grain is uniform, consistency is high, mechanical property
The advantages that good, but cost is higher, energy consumption is larger.
6) microwave sintering, has that inside and outside whole heating, uniform temperature fields, thermal stress are small and efficiency is high, pollution-free etc. excellent
Point, but it is of high cost, sintering condition is stringent.
Invention content
It is an object of the invention to overcome problem above of the existing technology, it is nano combined to provide a kind of novel oxidized aluminium
The preparation method of material has the characteristics that high-efficiency low energy consumption sintering temperature is low, sintering velocity is fast, the Isothermal sinter time is short, burns
The features such as tying product consistency height, sintering aid need not be added.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme：
A kind of preparation method of novel oxidized aluminium nanocomposite, includes the following steps：
Step 1) mixing of wear-resistant ceramic fission, include the Al of 90-95% weight2O3, the talcum of 1-3% weight, 2% weight
CaCO3, the clay of 5% weight, the B of 0.6-1.2% weight2O, remaining is adhesive；
Step 2) ball milling, it is dried, is granulated, and compression moulding using drying machine；
Step 3) flash burning sample；
Step 4) macro property detection；
Step 5) micro-analysis；
Step 6) theoretical calculation, and guide engineer application.
Preferably, in the step 1, the dispersant of acidic materials is added into the mixture, adjusts the pH of mixture
Value.
Preferably, it in the step 2, adds the antifoaming agent and is produced after described adhesive mixes and stirs with removing
Raw bubble.
Further, Ball-milling Time is 12-48h in the step 2.
Further, the electric field strength of the flash burning sample of the step 3 is 500-2000V/cm, electric current 400-
600mA, sintering time 2-4min.
Further, in the step 4 macro property detection include consistency, wear rate, hardness, fracture toughness and/
Or bending strength detection.
Further, the micro-analysis in the step 5 includes fabric analysis, structural analysis and/or constituent analysis.
Further, the adhesive in the step 1 is polyvinyl alcohol water solution.
The beneficial effects of the invention are as follows:
1, the present invention is low with sintering temperature, sintering velocity is fast, the Isothermal sinter time is short, and sintered product consistency is high, no
It needs to add sintering aid, device is easy；Energy consumption and CO2 emission can be reduced.
2, aluminium oxide prepared by the present invention can be widely applied to cleaning shaft wear-resistant ceramic material；Novel high wear-resistant No leakage
Primary air piping assembly material；Boiler-burner air hose, coal chute road；Transmission pipeline etc..
3, meet great demand of the high-end manufacturing industry of national industry growth requirement to wear-resistant material.
4, wear-resistant ceramic material flash burning new preparation technology, at low cost, high efficiency, flash burning, which prepares alumina ceramic material, to be had
The energy saving, advantages such as drop this, are in advanced international level.
Industrialization advantage：Possess Project Product production, detection device and team of engineering industry.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
The specific implementation mode of the present invention is shown in detail by following embodiment and its attached drawing.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is aluminium oxide normal sintering SEM figures；
Fig. 2 is that aluminium oxide flash burning is sintered SEM figures；
Fig. 3 be flash burning relative to other sintering technologies the contrast schematic diagram in terms of temperature, sintering time.
Specific implementation mode
It is below with reference to the accompanying drawings and in conjunction with the embodiments, next that the present invention will be described in detail.
When using normal pressure-sintered aluminium oxide ceramics, have the advantages that it is simple for process, but sintering temperature high (1600 DEG C or so),
Energy consumption is greatly, densification time length (2h) product qualification rate is low, manufacturing cost is high, and sintering SEM figures are shown referring to Fig.1.
A kind of preparation method of novel oxidized aluminium nanocomposite, includes the following steps：
Step 1) mixing of wear-resistant ceramic fission, include the Al of 90-95% weight2O3, the talcum of 1-3% weight, 2% weight
CaCO3, the clay of 5% weight, the B of 0.6-1.2% weight2O, remaining is adhesive；
Step 2) ball milling 12-48h, it is dried, is granulated, and compression moulding using drying machine；
Step 3) flash burning sample；
Step 4) macro property detection；
Step 5) micro-analysis；
Step 6) theoretical calculation, and guide engineer application.
In a preferred embodiment of the invention, in step 1, the dispersion of acidic materials is added into the mixture
Agent adjusts the pH value of mixture.
In another preferred embodiment of the invention, in step 2, the antifoaming agent is added to remove described viscous
The bubble that mixture mixes and stirring generates later.
From the point of view of specific implementation of the present invention prepares aluminium oxide nano composite material, the electricity of the flash burning sample of step 3 of the present invention
Field intensity is 500-2000V/cm, electric current 400-600mA, sintering time 2-4min.
From the point of view of specific implementation of the present invention prepares aluminium oxide nano composite material, the macro property inspection in step 4 of the present invention
Survey includes consistency, wear rate, hardness, fracture toughness and/or bending strength detection.
From the point of view of specific implementation of the present invention prepares aluminium oxide nano composite material, the micro-analysis in the step 5 includes
Fabric analysis, structural analysis and/or constituent analysis.
From the point of view of specific implementation of the present invention prepares aluminium oxide nano composite material, the adhesive in the step 1 is poly- second
Enol aqueous solution.
With reference to shown in Fig. 3, the present invention is low with sintering temperature, sintering velocity is fast, the Isothermal sinter time is short, and sintered product causes
Density is high, need not add sintering aid, and device is easy；Energy consumption and CO2 emission, sintering SEM figure ginsengs can be reduced
Shown in Fig. 2.
Aluminium oxide prepared by the present invention can be widely applied to cleaning shaft wear-resistant ceramic material；Novel high wear-resistant No leakage one
Secondary wind pipe component material；Boiler-burner air hose, coal chute road；Transmission pipeline etc..
Wear-resistant ceramic material flash burning new preparation technology, at low cost, high efficiency, flash burning, which prepares alumina ceramic material, has section
The advantages that can, drop this etc., are in advanced international level.Meet the high-end manufacturing industry of national industry growth requirement to the huge of wear-resistant material
Demand.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of preparation method of novel oxidized aluminium nanocomposite, which is characterized in that include the following steps：
Step 1) mixing of wear-resistant ceramic fission, include the Al of 90-95% weight2O3, the talcum of 1-3% weight, 2% weight
CaCO3, the clay of 5% weight, the B of 0.6-1.2% weight2O, remaining is adhesive；
Step 2) ball milling, it is dried, is granulated, and compression moulding using drying machine；
Step 3) flash burning sample；
Step 4) macro property detection；
Step 5) micro-analysis；
Step 6) theoretical calculation, and guide engineer application.
2. a kind of preparation method of novel oxidized aluminium nanocomposite according to claim 1, it is characterised in that：It is described
In step 1, the dispersant of acidic materials is added into the mixture, adjusts the pH value of mixture.
3. a kind of preparation method of novel oxidized aluminium nanocomposite according to claim 1, it is characterised in that：It is described
In step 2, the antifoaming agent is added to remove and mixes and stir the bubble generated later in described adhesive.
4. a kind of preparation method of novel oxidized aluminium nanocomposite according to claim 1, it is characterised in that：It is described
Ball-milling Time is 12-48h in step 2.
5. a kind of preparation method of novel oxidized aluminium nanocomposite according to claim 1, it is characterised in that：It is described
The electric field strength of the flash burning sample of step 3 is 500-2000V/cm, electric current 400-600mA, sintering time 2-4min.
6. a kind of preparation method of novel oxidized aluminium nanocomposite according to claim 1, it is characterised in that：It is described
Macro property detection in step 4 includes consistency, wear rate, hardness, fracture toughness and/or bending strength detection.
7. a kind of preparation method of novel oxidized aluminium nanocomposite according to claim 1, it is characterised in that：It is described
Micro-analysis in step 5 includes fabric analysis, structural analysis and/or constituent analysis.
8. a kind of preparation method of novel oxidized aluminium nanocomposite according to claim 1, it is characterised in that：It is described
Adhesive in step 1 is polyvinyl alcohol water solution.
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| CN201810356105.9A CN108640659A (en) | 2018-04-19 | 2018-04-19 | A kind of preparation method of novel oxidized aluminium nanocomposite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204328A (en) * | 2019-06-05 | 2019-09-06 | 西南交通大学 | A kind of preparation method of high entropy oxide ceramics |
| CN113149619A (en) * | 2021-05-14 | 2021-07-23 | 景德镇陶瓷大学 | High-strength low-dielectric-loss alumina ceramic substrate |
-
2018
- 2018-04-19 CN CN201810356105.9A patent/CN108640659A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204328A (en) * | 2019-06-05 | 2019-09-06 | 西南交通大学 | A kind of preparation method of high entropy oxide ceramics |
| CN110204328B (en) * | 2019-06-05 | 2021-09-07 | 西南交通大学 | Preparation method of high-entropy oxide ceramic |
| CN113149619A (en) * | 2021-05-14 | 2021-07-23 | 景德镇陶瓷大学 | High-strength low-dielectric-loss alumina ceramic substrate |
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