CN108298964A - High-purity fine grain wear-resisting alumina liner plate and preparation method thereof - Google Patents

High-purity fine grain wear-resisting alumina liner plate and preparation method thereof Download PDF

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CN108298964A
CN108298964A CN201810317105.8A CN201810317105A CN108298964A CN 108298964 A CN108298964 A CN 108298964A CN 201810317105 A CN201810317105 A CN 201810317105A CN 108298964 A CN108298964 A CN 108298964A
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alpha
liner plate
aluminum oxide
alumina
phase aluminum
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CN108298964B (en
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蒋丹宇
吴事江
杨焕顺
李拯
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Zibo Kai Star New Materials Co Ltd
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Abstract

The invention belongs to aluminium oxide ceramics fields in inorganic non-metallic material, and in particular to a kind of high-purity fine grain wear-resisting alumina liner plate and preparation method thereof.It is sanded by alpha-phase aluminum oxide A and alpha-phase aluminum oxide B mixing, mist projection granulating, molding, sintering obtain high-purity fine grain wear-resisting alumina liner plate；Boehmite, Ludox are mixed and refined with commercial alumina wet-milling, obtains and alpha-phase aluminum oxide A is obtained by press filtration, expansion drying, calcining by the fine grained mixed slurry of 600 mesh screens；Magnesium fluoride, boric acid and high-temperature calcination alumina dry bastard are ground and refined, the fine granular powder by 180 mesh screens is obtained, calcining obtains alpha-phase aluminum oxide B.The present invention obtains crystallite dimension bimodal distribution in microstructure, and has a small amount of nonequiaxial crystalline substance, improves the hardness and wearability of aluminium oxide liner plate；The present invention also provides preparation method, convenience simple for process, process parameter control are easy, can be stably produced.

Description

High-purity fine grain wear-resisting alumina liner plate and preparation method thereof
Technical field
The invention belongs to aluminium oxide ceramics fields in inorganic non-metallic material, and in particular to a kind of high-purity wear-resisting oxidation of fine grain Aluminium liner plate and preparation method thereof.
Background technology
In fields such as metallurgy, mine, electric power and chemical industry, in need using conveying belt delivering hard raw mineral materials, the past exists Oil-containing nylon plate is commonly used on conveyer belt or polymeric liner consigns material, but due to wearing no resistance, it occur frequently that putty, needs Liner plate is replaced, maintenance cost is caused to increase, reduces effect.Then, people use cast iron as wear-resistant liner, although wear-resisting property Improve a lot, but for hard ware material, still unresolved wearability the problem of.Therefore, using the aluminium oxide ceramics of high rigidity As wear-resistant liner, just become a kind of inevitable choice.
Using liner plate wearability is improved, there are two types of methods at present, one is hard ware material is added in polymeric liner, such as Application No. is the Chinese invention patents of CN201110399222.1 to disclose a kind of impact-resistant abrasion-proof lining board and preparation method thereof, It uses ultra-high molecular weight polyethylene 40-55, medium density polyethylene 5-10, low density polyethylene (LDPE) 5-10, ultrafine aluminium hydroxide 3- 5, diatomite 20-30, vinyltriethoxysilane 8-10, benzoic acid 0.5-1.5, cumyl peroxide 0.3-0.5.It will match Square bar material is hot-forming after high-speed stirred is uniform, then on hot press.Obtained impact-resistant abrasion-proof lining board remains superelevation The processing performance of molecular material and feature at low cost, but the wear resistance of anti-hard mineral is insufficient.Application number CN101182193 Chinese invention patent disclose a kind of cyclone abrasion-resistant ceramic lining plate and preparation method thereof, use following weight percent Raw material is made：Yttrium oxide 2%~8%, aluminium oxide 2%~10%, carbon fiber 14%~20%, silicon carbide 65%~80%.Pottery Ceramic liner plate forms the yttroalumite of low temperature, is conducive to be carbonized using the rare earth materials such as aluminium oxide and yttrium oxide are added in sintering process The densification of silicon liner plate, the product porosity reduce；Consider the big feature of the brittleness of silicon carbide simultaneously, add carbon fiber in the feed, The presence of carbon fiber can be such that phenomena such as crack expansion deflection and spike protein gene occurs, to improve the fracture toughness of product.But specially The performance indicators such as fracture toughness are not provided in profit, only say that component life has larger extension.Meanwhile carbon fiber is more expensive, and The densified sintering products ceramics such as silicon carbide need higher sintering temperature and pressure, such as use hot pressed sintering, these not only increase lining The manufacturing cost of plate, and limit the size and shape of liner plate.
Invention content
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of high-purity fine grain wear-resisting alumina liner plates, aobvious Crystallite dimension bimodal distribution is obtained in micro-structure, and has a small amount of nonequiaxial crystalline substance, and there is high rigidity and wearability；The present invention also provides Preparation method, convenience simple for process, process parameter control are easy, can be stably produced.
High-purity fine grain wear-resisting alumina liner plate of the present invention is sanded by alpha-phase aluminum oxide A and alpha-phase aluminum oxide B mixing, Mist projection granulating, molding, sintering obtain high-purity fine grain wear-resisting alumina liner plate；
Wherein：The preparation method of alpha-phase aluminum oxide A is：Boehmite, Ludox are mixed simultaneously with commercial alumina wet-milling Refinement obtains and obtains alpha-phase aluminum oxide A by press filtration, expansion drying, calcining by the fine grained mixed slurry of 600 mesh screens；
The preparation method of alpha-phase aluminum oxide B is：Magnesium fluoride, boric acid and high-temperature calcination alumina dry bastard are ground and refined, is obtained The fine granular powder by 180 mesh screens is obtained, calcining obtains alpha-phase aluminum oxide B.
Wherein：
The mass ratio of alpha-phase aluminum oxide A and alpha-phase aluminum oxide B are 3：1 to 1：3.
The additive amount of boehmite is the 3%~10% of commercial alumina mass fraction, and the additive amount of Ludox is work The mass fraction of the 0.1%~0.4% of industry quality of alumina score, the Ludox is 10~20%.
The additive amount of magnesium fluoride is the 0.1%~0.3% of high-temperature calcination quality of alumina score, and the additive amount of boric acid is high The 0.4%~0.8% of warm calcined alumina mass fraction.
Calcination temperature is 800 DEG C~1100 DEG C in the preparation method of alpha-phase aluminum oxide A, and calcination time is 2~10 hours； The alpha-phase aluminum oxide A size distributions arrived are D50At 0.6~1.8 micron.
Calcination temperature is 1100 DEG C~1300 DEG C in the preparation method of alpha-phase aluminum oxide B, and calcination time is 2~10 hours； The alpha-phase aluminum oxide B size distributions arrived are D50At 2~3 microns.
Impurity in commercial alumina containing total mass fraction no more than 1%, high-temperature calcination aluminium oxide contain gross mass point Impurity of the number no more than 2.0%.
High-purity fine grain wear-resisting alumina liner plate crystallite dimension in microstructure is in bimodal distribution.
The preparation method of high-purity fine grain wear-resisting alumina liner plate of the present invention, steps are as follows：
(1) boehmite, Ludox are mixed and is refined with commercial alumina wet-milling, obtained through 600 mesh screens Fine grained mixed slurry；
(2) the fine grained mixed slurry that step (1) is prepared is by press filtration, expansion drying, calcining, commercial alumina It undergoes phase transition and generates alpha-phase aluminum oxide A；
(3) magnesium fluoride, boric acid and high-temperature calcination alumina dry bastard are ground and is refined, obtained through the thin of 180 mesh screens Granular powder；
(4) fine granular powder that step (3) is prepared is calcined, and obtains alpha-phase aluminum oxide B；
(5) the alpha-phase aluminum oxide A that step (2) obtains and the alpha-phase aluminum oxide B that step (4) obtains are mixed, is sanded, spraying is made Grain obtains aluminium oxide pelletizing；
(6) molding obtains the biscuit of aluminium oxide liner plate；
(7) it is sintered, obtains high-purity wear-resisting alumina liner plate.
Control slurry D is sanded in step (5)50At 2 microns or less.
As a kind of perferred technical scheme, the preparation method of high-purity fine grain wear-resisting alumina liner plate of the present invention, Steps are as follows：
The first step selects commercial alumina to be added in tumbling ball mill, addition commercial alumina mass fraction 3~10% Boehmite and commercial alumina mass fraction 0.1~0.4% Ludox together with commercial alumina wet-milling mix And material is refined, acquisition can pass through the fine grained mixed slurry of 600 mesh screens；Ludox mass fraction is 10~20%；
Fine grained mixed slurry made from the first step is passed through press filtration and expansion drying, obtains dry powder by second step, It is calcined 2~10 hours under being spent at 800 DEG C~1100 DEG C, so that commercial alumina is undergone phase transition and generate fine grain alpha-phase aluminum oxide A, granularity D50 is distributed as at 0.6~1.8 micron；
Third walks, and selects the aluminium oxide of commercially available high-temperature calcination, is added in tumbling ball mill, adds high-temperature calcination aluminium oxide 0.4~0.8% boric acid of 0.1~0.3% magnesium fluoride and high-temperature calcination quality of alumina score of mass fraction, does together Bastard grinds and refines material, and acquisition can pass through the fine granular powder of 180 mesh screens；
Third is walked fine granular powder obtained, calcines 2~10 hours, remove under being spent at 1100 DEG C~1300 DEG C by the 4th step The sodium impurity in commercially available powder is removed, and keeps alumina grain development complete, obtains alpha-phase aluminum oxide B, size distribution D502~3 Micron；
5th step, according to the mass ratio of A and B from 3：1 to 1：3 range, after two kinds of materials are mixed, through sand mill sand Mill, control slurry D50 are not more than 2 microns, and then mist projection granulating, obtains aluminium oxide pelletizing.
Third step pelletizing obtained is molded and obtains the biscuit of aluminium oxide liner plate by the 6th step in a mold；
Biscuit is sintered under 1450 DEG C~1550 DEG C of lower temperature, obtains high-purity fine grain wear-resisting alumina by the 7th step Liner plate.
Compared with prior art, the present invention has the following advantages：
(1) present invention provides a kind of high-purity fine grain wear-resisting alumina liner plate being sintered at a lower temperature, using low cost The different type aluminium oxide of technical grade is raw material, changes pre-burning and ball-milling treatment technique through different material, obtains different grain size point The alpha-phase aluminum oxide of the alpha-phase aluminum oxide of cloth and phase transition degree, different grain size distribution and phase transition degree inherently gives birth to crystal grain Long control, in addition, the additive amount of boehmite additive amount, magnesium fluoride, boric acid etc. has certain influence, later stage to crystallite dimension Crystallite dimension and the speed of growth are further controlled using different calcining systems；Bimodal point of crystallite dimension is obtained in microstructure Cloth, and have a small amount of nonequiaxial crystalline substance, the hardness and wearability of aluminium oxide liner plate can be improved.
(2) present invention uses two kinds of raw materials of commercial alumina and high-temperature calcination aluminium oxide, is further removed by calcine technology Decontamination and the phase inversion degree for improving aluminium oxide lay the first stone for microstructure regulation and control；At different two kinds of former grain size Raw material forming and sintering wear-resisting alumina liner plate after reason, obtains the microstructure of various grain sizes distribution, and a small amount of column occurs Shape is brilliant, improves the hardness and wearability of aluminium oxide ceramics.
(3) physical and chemical index of the high-purity fine grain wear-resisting alumina liner plate of finished product prepared by the present invention is as follows：
Sodium mass fraction is less than 0.1%；
Crystallite dimension is in bimodal distribution in microstructure, and liner plate crystallite dimension is deposited under 1.6 microns between 2-4 microns In two peak Distributions；
It is sintered obtained aluminium oxide ceramics liner plate purity ＞ 99%；
Aluminium oxide ceramics liner plate vickers hardness hv 5 is more than 15GPa；
Wearability index：Fracture toughness ＞ 3.3MPm1/2。
(4) the present invention also provides preparation method, convenience simple for process, process parameter control be easy, can carry out stablizing batch Amount production.
Specific implementation mode
With reference to embodiment, the present invention will be further described.
Embodiment 1
The first step selects commercial alumina to be added in tumbling ball mill, and intending for addition aluminium oxide total mass fraction 3% is thin Diaspore and 0.2% mass fraction be 16% Ludox together with commercial alumina wet-milling mix and refines material, acquisition The fine grained mixed slurry of 600 mesh screens can be passed through；
Fine grained mixed slurry made from the first step is passed through press filtration and expansion drying, obtains dry powder by second step, It is calcined 4 hours at 900 DEG C, so that commercial alumina is undergone phase transition and generate fine grain alpha-phase aluminum oxide A, size distribution is D50 1.0 Micron；
Third walks, and selects the aluminium oxide of commercially available high-temperature calcination, is added in tumbling ball mill, addition aluminium oxide gross mass point The boric acid of the magnesium fluoride and total mass fraction 0.6% of number 0.2% dry-mixed ball milling and refines material together, and acquisition can pass through 180 The fine granular powder of mesh screen；
Third is walked fine granular powder obtained, calcines 4 hours, removed in commercially available powder under being spent at 1200 DEG C by the 4th step Sodium impurity, and keep alumina grain development complete, obtain alpha-phase aluminum oxide B, size distribution is D50 at 2.6 microns；
5th step, according to the mass ratio 1 of A and B：It after 1 mixes two kinds of materials, is sanded through sand mill, control slurry D50 is not More than 1.8 microns, then mist projection granulating, obtains aluminium oxide pelletizing.
Third step pelletizing obtained is molded and obtains the biscuit of aluminium oxide liner plate by the 6th step in a mold；
Biscuit is sintered by the 7th step under 1450 DEG C~1550 DEG C of lower temperature, and it is resistance to obtain the high-purity aluminium oxide of fine grain Mill lining plate.
The physical and chemical index of wear-resisting alumina liner plate prepared by the above method is：
Sodium mass fraction 0.08%；
There are two peak Distributions at 1.5 microns and 3.1 microns for liner plate crystallite dimension；
It is 99.2% to be sintered obtained aluminium oxide ceramics liner plate purity；
Aluminium oxide ceramics liner plate vickers hardness hv 5 is 15.6GPa；
Wearability index：
Fracture toughness ＞ 3.4MPm1/2。
Embodiment 2
The first step selects commercial alumina to be added in tumbling ball mill, and intending for addition aluminium oxide total mass fraction 6% is thin Diaspore and 0.3% mass fraction be 18% Ludox together with commercial alumina wet-milling mix and refines material, acquisition The fine grained mixed slurry of 600 mesh screens can be passed through；
Fine grained mixed slurry made from the first step is passed through press filtration and expansion drying, obtains dry powder by second step, It is calcined 4 hours at 1100 DEG C, so that commercial alumina is undergone phase transition and generate fine grain alpha-phase aluminum oxide A, size distribution is D50 1.5 Micron；
Third walks, and selects the aluminium oxide of commercially available high-temperature calcination, is added in tumbling ball mill, addition aluminium oxide gross mass point The boric acid of the magnesium fluoride and total mass fraction 0.8% of number 0.1% dry-mixed ball milling and refines material together, and acquisition can pass through 180 The fine granular powder of mesh screen；
Third is walked fine granular powder obtained, calcines 4 hours, removed in commercially available powder under being spent at 1300 DEG C by the 4th step Sodium impurity, and keep alumina grain development complete, obtain alpha-phase aluminum oxide B, size distribution is D50 at 3.0 microns；
5th step, according to the mass ratio 1 of A and B：It after 1 mixes two kinds of materials, is sanded through sand mill, control slurry D50 is not More than 1.8 microns, then mist projection granulating, obtains aluminium oxide pelletizing.
Third step pelletizing obtained is molded and obtains the biscuit of aluminium oxide liner plate by the 6th step in a mold；
Biscuit is sintered by the 7th step under 1450 DEG C~1550 DEG C of lower temperature, and it is resistance to obtain the high-purity aluminium oxide of fine grain Mill lining plate.
The physical and chemical index of wear-resisting alumina liner plate prepared by the above method is：
Sodium mass fraction 0.06%；
There are two peak Distributions at 1.8 microns and 3.5 microns for liner plate crystallite dimension；
It is 99.5% to be sintered obtained aluminium oxide ceramics liner plate purity；
Aluminium oxide ceramics liner plate vickers hardness hv 5 is 16.0GPa；
Wearability index：
Fracture toughness ＞ 3.6MPm1/2。
Embodiment 3
The first step selects commercial alumina to be added in tumbling ball mill, and addition aluminium oxide total mass fraction 10% is intended Boehmite and 0.1% mass fraction be 20% Ludox together with commercial alumina wet-milling mix and refine material, obtain The fine grained mixed slurry of 600 mesh screens can be passed through by obtaining；
Fine grained mixed slurry made from the first step is passed through press filtration and expansion drying, obtains dry powder by second step, It is calcined 4 hours at 800 DEG C, so that commercial alumina is undergone phase transition and generate fine grain alpha-phase aluminum oxide A, size distribution is D50 0.6 Micron；
Third walks, and selects the aluminium oxide of commercially available high-temperature calcination, is added in tumbling ball mill, addition aluminium oxide gross mass point The boric acid of the magnesium fluoride and total mass fraction 0.4% of number 0.3% dry-mixed ball milling and refines material together, and acquisition can pass through 180 The fine granular powder of mesh screen；
Third is walked fine granular powder obtained, calcines 4 hours, removed in commercially available powder under being spent at 1100 DEG C by the 4th step Sodium impurity, and keep alumina grain development complete, obtain alpha-phase aluminum oxide B, size distribution is D50 at 2.5 microns；
5th step, according to the mass ratio 2 of A and B：It after 1 mixes two kinds of materials, is sanded through sand mill, control slurry D50 is not More than 1.8 microns, then mist projection granulating, obtains aluminium oxide pelletizing.
Third step pelletizing obtained is molded and obtains the biscuit of aluminium oxide liner plate by the 6th step in a mold；
Biscuit is sintered by the 7th step under 1450 DEG C~1550 DEG C of lower temperature, and it is resistance to obtain the high-purity aluminium oxide of fine grain Mill lining plate.
The physical and chemical index of wear-resisting alumina liner plate prepared by the above method is：
Sodium mass fraction 0.06%；
There are two peak Distributions at 1.0 microns and 3.0 microns for liner plate crystallite dimension；
It is 99.1% to be sintered obtained aluminium oxide ceramics liner plate purity；
Aluminium oxide ceramics liner plate vickers hardness hv 5 is 15.5GPa；
Wearability index：
Fracture toughness ＞ 3.3MPm1/2。
Embodiment 4
The first step selects commercial alumina to be added in tumbling ball mill, and intending for addition aluminium oxide total mass fraction 8% is thin Diaspore and 0.3% mass fraction be 15% Ludox together with commercial alumina wet-milling mix and refines material, acquisition The fine grained mixed slurry of 600 mesh screens can be passed through；
Fine grained mixed slurry made from the first step is passed through press filtration and expansion drying, obtains dry powder by second step, It is calcined 4 hours at 1000 DEG C, so that commercial alumina is undergone phase transition and generate fine grain alpha-phase aluminum oxide A, size distribution is D50 1.2 Micron；
Third walks, and selects the aluminium oxide of commercially available high-temperature calcination, is added in tumbling ball mill, addition aluminium oxide gross mass point The boric acid of the magnesium fluoride and total mass fraction 0.5% of number 0.2% dry-mixed ball milling and refines material together, and acquisition can pass through 180 The fine granular powder of mesh screen；
Third is walked fine granular powder obtained, calcines 4 hours, removed in commercially available powder under being spent at 1200 DEG C by the 4th step Sodium impurity, and keep alumina grain development complete, obtain alpha-phase aluminum oxide B, size distribution is D50 at 2.6 microns；
5th step, according to the mass ratio 1 of A and B：It after 2 mix two kinds of materials, is sanded through sand mill, control slurry D50 is not More than 1.8 microns, then mist projection granulating, obtains aluminium oxide pelletizing.
Third step pelletizing obtained is molded and obtains the biscuit of aluminium oxide liner plate by the 6th step in a mold；
Biscuit is sintered by the 7th step under 1450 DEG C~1550 DEG C of lower temperature, and it is resistance to obtain the high-purity aluminium oxide of fine grain Mill lining plate.
The physical and chemical index of wear-resisting alumina liner plate prepared by the above method is：
Sodium mass fraction 0.08%；
There are two peak Distributions at 1.5 microns and 3.2 microns for liner plate crystallite dimension；
It is 99.0% to be sintered obtained aluminium oxide ceramics liner plate purity；
Aluminium oxide ceramics liner plate vickers hardness hv 5 is 16.0GPa；
Wearability index：
Fracture toughness ＞ 3.3MPm1/2。
Embodiment 5
The first step selects commercial alumina to be added in tumbling ball mill, and intending for addition aluminium oxide total mass fraction 7% is thin Diaspore and 0.2% mass fraction be 18% Ludox together with commercial alumina wet-milling mix and refines material, acquisition The fine grained mixed slurry of 600 mesh screens can be passed through；
Fine grained mixed slurry made from the first step is passed through press filtration and expansion drying, obtains dry powder by second step, It is calcined 4 hours at 1000 DEG C, so that commercial alumina is undergone phase transition and generate fine grain alpha-phase aluminum oxide A, size distribution is D50 1.3 Micron；
Third walks, and selects the aluminium oxide of commercially available high-temperature calcination, is added in tumbling ball mill, addition aluminium oxide gross mass point The boric acid of the magnesium fluoride and total mass fraction 0.6% of number 0.3% dry-mixed ball milling and refines material together, and acquisition can pass through 180 The fine granular powder of mesh screen；
Third is walked fine granular powder obtained, calcines 4 hours, removed in commercially available powder under being spent at 1100 DEG C by the 4th step Sodium impurity, and keep alumina grain development complete, obtain alpha-phase aluminum oxide B, size distribution is D50 at 2.4 microns；
5th step, according to the mass ratio 1 of A and B：It after 3 mix two kinds of materials, is sanded through sand mill, control slurry D50 is not More than 1.8 microns, then mist projection granulating, obtains aluminium oxide pelletizing.
Third step pelletizing obtained is molded and obtains the biscuit of aluminium oxide liner plate by the 6th step in a mold；
Biscuit is sintered by the 7th step under 1450 DEG C~1550 DEG C of lower temperature, and it is resistance to obtain the high-purity aluminium oxide of fine grain Mill lining plate.
The physical and chemical index of wear-resisting alumina liner plate prepared by the above method is：
Sodium mass fraction 0.08%；
There are two peak Distributions at 1.6 microns and 2.8 microns for liner plate crystallite dimension；
It is 99.1% to be sintered obtained aluminium oxide ceramics liner plate purity；
Aluminium oxide ceramics liner plate vickers hardness hv 5 is 16.1GPa；
Wearability index：
Fracture toughness ＞ 3.6MPm1/2。
The aluminium oxide wear-resistant liner made of above example has the characteristics that hardness height and wearability are good.

Claims (10)

1. a kind of high-purity fine grain wear-resisting alumina liner plate, it is characterised in that：It is sanded by alpha-phase aluminum oxide A and alpha-phase aluminum oxide B mixing, Mist projection granulating, molding, sintering obtain high-purity fine grain wear-resisting alumina liner plate；
Wherein：The preparation method of alpha-phase aluminum oxide A is：Boehmite, Ludox are mixed and thin with commercial alumina wet-milling Change, obtains and alpha-phase aluminum oxide A is obtained by press filtration, expansion drying, calcining by the fine grained mixed slurry of 600 mesh screens；
The preparation method of alpha-phase aluminum oxide B is：Magnesium fluoride, boric acid and high-temperature calcination alumina dry bastard are ground and refined, is led to The fine granular powder of 180 mesh screens is crossed, calcines, obtains alpha-phase aluminum oxide B.
2. high-purity fine grain wear-resisting alumina liner plate according to claim 1, it is characterised in that：Alpha-phase aluminum oxide A and α phase oxygen The mass ratio for changing aluminium B is 3：1 to 1：3.
3. high-purity fine grain wear-resisting alumina liner plate according to claim 1, it is characterised in that：The additive amount of boehmite The 3%~10% of commercial alumina mass fraction, the additive amount of Ludox be commercial alumina mass fraction 0.1%~ 0.4%, the mass fraction of the Ludox is 10~20%.
4. high-purity fine grain wear-resisting alumina liner plate according to claim 1, it is characterised in that：The additive amount of magnesium fluoride is high The additive amount of the 0.1%~0.3% of warm calcined alumina mass fraction, boric acid is high-temperature calcination quality of alumina score 0.4%~0.8%.
5. high-purity fine grain wear-resisting alumina liner plate according to claim 1, it is characterised in that：The preparation side of alpha-phase aluminum oxide A Calcination temperature is 800 DEG C~1100 DEG C in method, and calcination time is 2~10 hours；Obtained alpha-phase aluminum oxide A size distributions are D50 At 0.6~1.8 micron.
6. high-purity fine grain wear-resisting alumina liner plate according to claim 1, it is characterised in that：The preparation side of alpha-phase aluminum oxide B Calcination temperature is 1100 DEG C~1300 DEG C in method, and calcination time is 2~10 hours；Obtained alpha-phase aluminum oxide B size distributions are D50 At 2~3 microns.
7. high-purity fine grain wear-resisting alumina liner plate according to claim 1, it is characterised in that：Containing total in commercial alumina Mass fraction is not more than 1% impurity, and high-temperature calcination aluminium oxide contains the impurity that total mass fraction is not more than 2.0%.
8. high-purity fine grain wear-resisting alumina liner plate according to claim 1, it is characterised in that：High-purity fine grain wear-resisting alumina Liner plate crystallite dimension in microstructure is in bimodal distribution.
9. a kind of preparation method of any high-purity fine grain wear-resisting alumina liner plates of claim 1-8, it is characterised in that：Step It is rapid as follows：
(1) boehmite, Ludox are mixed and is refined with commercial alumina wet-milling, obtain thin by 600 mesh screens Grain mixed slurry；
(2) the fine grained mixed slurry that step (1) is prepared occurs by press filtration, expansion drying, calcining, commercial alumina Phase transformation generates alpha-phase aluminum oxide A；
(3) magnesium fluoride, boric acid and high-temperature calcination alumina dry bastard are ground and is refined, obtain the fine grained by 180 mesh screens Powder；
(4) fine granular powder that step (3) is prepared is calcined, and obtains alpha-phase aluminum oxide B；
(5) the alpha-phase aluminum oxide A that step (2) obtains and the alpha-phase aluminum oxide B that step (4) obtains are mixed, are sanded, mist projection granulating, Obtain aluminium oxide pelletizing；
(6) molding obtains the biscuit of aluminium oxide liner plate；
(7) it is sintered, obtains high-purity wear-resisting alumina liner plate.
10. the preparation method of high-purity fine grain wear-resisting alumina liner plate according to claim 9, it is characterised in that：Step (5) Middle sand milling control slurry D50At 2 microns or less.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111018500A (en) * 2019-12-24 2020-04-17 江苏省陶瓷研究所有限公司 Preparation method of high-purity alumina ceramic and preparation method of ceramic product
CN113817411A (en) * 2021-10-18 2021-12-21 德米特（苏州）电子环保材料有限公司 Alumina matrix polishing solution and preparation method and application thereof
CN115466107A (en) * 2022-11-14 2022-12-13 湖南圣瓷科技有限公司 Alumina ceramic with coarse crystal-fine crystal composite microstructure characteristics and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081403A1 (en) * 2001-04-09 2002-10-17 The Morgan Crucible Company Plc. High temperature resistant ceramic sintered material, method for the production and use thereof
CN102320638A (en) * 2011-08-04 2012-01-18 中国铝业股份有限公司 Preparation method of low-sodium fine grain alumina
CN106431364A (en) * 2016-09-09 2017-02-22 苏州创元新材料科技有限公司 Method for preparing high-temperature sintering ceramic aluminum oxide grinding material
CN106673626A (en) * 2017-01-23 2017-05-17 郑州玉发精瓷科技有限公司 Low-cost alumina powder material for producing self-toughened wear-resistant alumina ceramic

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081403A1 (en) * 2001-04-09 2002-10-17 The Morgan Crucible Company Plc. High temperature resistant ceramic sintered material, method for the production and use thereof
CN102320638A (en) * 2011-08-04 2012-01-18 中国铝业股份有限公司 Preparation method of low-sodium fine grain alumina
CN106431364A (en) * 2016-09-09 2017-02-22 苏州创元新材料科技有限公司 Method for preparing high-temperature sintering ceramic aluminum oxide grinding material
CN106673626A (en) * 2017-01-23 2017-05-17 郑州玉发精瓷科技有限公司 Low-cost alumina powder material for producing self-toughened wear-resistant alumina ceramic

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111018500A (en) * 2019-12-24 2020-04-17 江苏省陶瓷研究所有限公司 Preparation method of high-purity alumina ceramic and preparation method of ceramic product
CN113817411A (en) * 2021-10-18 2021-12-21 德米特（苏州）电子环保材料有限公司 Alumina matrix polishing solution and preparation method and application thereof
CN115466107A (en) * 2022-11-14 2022-12-13 湖南圣瓷科技有限公司 Alumina ceramic with coarse crystal-fine crystal composite microstructure characteristics and application thereof
CN115466107B (en) * 2022-11-14 2023-06-30 湖南圣瓷科技有限公司 Alumina ceramic with coarse-fine composite microstructure characteristics and application thereof

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