CN102492394A - Preparation method of hexagonal tabular nano-crystal corundum abrasive - Google Patents
Preparation method of hexagonal tabular nano-crystal corundum abrasive Download PDFInfo
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- CN102492394A CN102492394A CN2011103687962A CN201110368796A CN102492394A CN 102492394 A CN102492394 A CN 102492394A CN 2011103687962 A CN2011103687962 A CN 2011103687962A CN 201110368796 A CN201110368796 A CN 201110368796A CN 102492394 A CN102492394 A CN 102492394A
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- abrasive
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- tabular
- corundum abrasive
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Abstract
The invention discloses a preparation method of hexagonal tabular nano-crystal corundum abrasive. The abrasive comprises raw materials of, by weight: 99.15-99.85% of an Al2(SO4)3.18H2O or Al(NO3)3.9H2O additive, and 0.15-0.85% of an additive. The additive comprises components of, by weight: 0-50% of nano-grade SiO2, 0-45% of Fe(NO3)3, 0-30%of Y(NO3)3, 5-100% of Ca(NO3)2, 0-70% of Mg(NO3)2, and 0-25% of Cr(NO3)3. According to the invention, an aluminum-containing precursor is synthesized by using a liquid-phase method, and the hexagonal tabular nano-crystal corundum abrasive is prepared through high-temperature calcining. The hardness of the corundum abrasive is similar to that of existing ceramic corundum abrasives, and the toughness of the corundum abrasive is higher by 9-25% than the existing ceramic corundum abrasive.
Description
Technical field
The present invention relates to abrasive machining tool, relate in particular to the preparation method of the tabular nanocrystalline corundum abrasive of a kind of six sides.
Background technology
Ground finish is precision machined important way, along with progress of science and technology, novel material be difficult to continuing to bring out of work material, grinding accuracy, working (machining) efficiency and working ability have all been proposed new challenge.Traditional abrasive material many times is difficult to satisfy the needs of modern processing, therefore, presses for the new type abrasive that adapts to different grinding demands.
Nanocrystalline corundum abrasive particle is different from the corundum abrasive of traditional scorification preparation by countless little nanocrystalline compositions, the difference on structural difference must be brought performance and use.Nanocrystalline corundum abrasive is compared advantage such as have good toughness, self-sharpening is good, abrasive particle is sharp, the emery wheel wearing quality is good with the large single crystal corundum abrasive of traditional scorification preparation; Simultaneously, can adjust its different performance and adapt to different grinding application needs through controlling microstructures such as the nanocrystalline size of nanocrystalline corundum abrasive, shape.
The corundum abrasive of different purposes is different to toughness reguirements, and the tabular nano aluminium oxide of six sides can significantly improve its fracture toughness property.Therefore, preparing a kind of six side's plate diamond spar abrasive materials is to improve its flexible effective way.
Summary of the invention
The objective of the invention is to improve the toughness of existing abrasive material, a kind of tabular nanocrystalline corundum abrasive of six sides that can significantly improve its fracture toughness property and preparation method thereof is provided.
The present invention is achieved through following technical scheme.
The tabular nanocrystalline corundum abrasive of a kind of six sides, feed composition and weight percent content thereof are: 99.15～99.85%Al
2(SO
4)
318H
2O or Al (NO
3)
39H
2O, 0.15～0.85% additive;
The feed composition of said additive and weight percent content thereof are: 0～50% nanometer SiO
2, 0～45%Fe (NO
3)
3, 0～30%Y (NO
3)
3, 5～100%Ca (NO
3)
2, 0～70%Mg (NO
3)
2With 0～25%Cr (NO
3)
3
The preparation method of the tabular nanocrystalline corundum abrasive of six sides has following steps:
(1) with Al
2(SO
4)
318H
2O or Al (NO
3)
39H
2O is water-soluble, treats to dissolve fully after-filtration and removes impurity, is made into the Al of 0.1～0.6mol/L
3+Solution;
(2) adding ammoniacal liquor and stirring make its complete colloidal sol or depositionization in the solution of step (1), obtain Al (OH) through suction filtration, washing process again
3Gel;
(3) by feed composition and weight percent content thereof be: 99.15～99.85% Al
2(SO
4)
318H
2O or Al (NO
3)
39H
2O, the ratio of 0.15～0.85% additive joins the respective amount additive in the colloid in the step (2), and makes distribution of additives even;
(4) step (3) is contained the Al (OH) of additive
3Colloid is dry, again granulation and sieving and classification;
(5) with step (4) sieved with the fractionated abrasive material 1150 ℃～1400 ℃ calcinings, further sieve again and classification, make the tabular nanocrystalline corundum abrasive of six sides.
The ammoniacal liquor of said step (2) is precipitation agent.
The micro-grain-size in inside of the tabular Nano Alumina Abrasive of six sides that said step (5) makes is 40nm～2 μ m.
The invention has the beneficial effects as follows; A kind of tabular nanocrystalline corundum abrasive of six sides that can significantly improve the abrasive material fracture toughness property and preparation method thereof is provided; The hardness of this corundum abrasive is suitable with the hardness of existing ceramic corundum abrasive, and toughness improves 9～25% than existing ceramic corundum abrasive.
Embodiment
Below in conjunction with specific embodiment the present invention is further described.
The grinding effect of aluminum oxide receives the influence of its inner grain size and shape obvious, and the fine crystalline structure of abrasive material can improve grinding accuracy, and the microcosmic platy structure of abrasive material can improve the toughness of abrasive material.In view of the foregoing, the present invention adopts that liquid phase method is synthetic to contain the aluminium presoma, prepares the tabular nanocrystalline corundum abrasive of six sides through high-temperature calcination again.
It is raw material that the present invention adopts commercially available analytical pure.
Embodiment 1
Adopt 99.85% Al (NO
3)
39H
2O and 0.15% additive are raw material, and the feed composition of said 0.15% additive and weight percent content are 30% nanometer SiO
2, 5%Y (NO
3)
3, 10%Fe (NO
3)
3, 26%Ca (NO
3)
2, 14%Mg (NO
3)
2And 15%Cr (NO
3)
3
At first with Al (NO
3)
39H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.1mol/L
3+The aqueous solution;
In above-mentioned solution, drip precipitation agent ammoniacal liquor and stir to make and contain this Al
3+The complete gelation of the aqueous solution, again through suction filtration, wash Al (OH)
3Gel;
0.15% additive is joined Al (OH)
3Mixing in the colloid; The Al (OH) that will contain additive
3Colloid is dry, the Al (OH) that gets
3Solid, granulation and sieving and classification again;
To sieve in advance and fractionated Al (OH)
31400 ℃ of down calcinings, further sieve again, classification, make varigrained tabular nanocrystalline corundum abrasive.
The inner micro-grain-size size of corundum abrasive is 1.23 μ m, and toughness is 3.18 ± 0.12MPam
1/2
Embodiment 2
Adopt 99.5% Al
2(SO
4)
318H
2O and 0.5% additive are raw material, and the feed composition of said 0.5% additive and weight percent content are 10% nanometer SiO
2, 30%Fe (NO
3)
3, 18%Y (NO
3)
3, 15%Ca (NO
3)
2And 27%Mg (NO
3)
2
At first with Al (NO
3)
39H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.2mol/L
3+The aqueous solution;
In above-mentioned solution, drip precipitation agent ammoniacal liquor and stir to make and contain this Al
3+The complete gelation of the aqueous solution, again through suction filtration, wash Al (OH)
3Gel;
0.5% additive agent is joined Al (OH)
3Mixing in the colloid.The Al (OH) that will contain additive
3The Al (OH) of the dry gained of colloid
3Solid, granulation and sieving and classification again;
To sieve in advance and fractionated Al (OH)
31150 ℃ of down calcinings, further sieve again, classification, make varigrained tabular nanocrystalline corundum abrasive.
The inner micro-grain-size size of corundum abrasive is 60nm, and toughness is 3.41 ± 0.06MPam
1/2
Embodiment 3
Adopt 99.3% Al (NO
3)
39H
2O and 0.7% additive are raw material, and the feed composition of said 0.7% additive and weight percent content are 9%Fe (NO
3)
3, 21%Ca (NO
3)
2, 45%Mg (NO
3)
2And 25%Cr (NO
3)
3
At first with Al (NO
3)
39H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.4mol/L
3+The aqueous solution;
In above-mentioned solution, drip precipitation agent ammoniacal liquor and stir to make and contain this Al
3+The complete gelation of the aqueous solution, again through suction filtration, wash Al (OH)
3Gel;
0.7% additive agent is joined Al (OH)
3Mixing in the colloid.
The Al (OH) that will contain additive
3The Al (OH) of the dry gained of colloid
3Solid, granulation and sieving and classification again;
To sieve in advance and fractionated Al (OH)
31310 ℃ of down calcinings, further sieve again, classification, make varigrained tabular nanocrystalline corundum abrasive.
The inner micro-grain-size size of corundum abrasive is 560nm, and toughness is 3.27 ± 0.10MPam
1/2
Embodiment 4
Adopt 99.15% Al (NO
3)
39H
2O and 0.85% additive are raw material, and said 0.85% additive is 100%Ca (NO
3)
2
At first with Al
2(SO
4)
318H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.6mol/L
3+The aqueous solution;
In above-mentioned solution, drip precipitation agent ammoniacal liquor and stir to make and contain this Al
3+The complete gelation of the aqueous solution, again through suction filtration, wash Al (OH)
3Gel;
0.85% additive is joined Al (OH)
3Mixing in the colloid;
The Al (OH) that will contain additive
3The Al (OH) of the dry gained of colloid
3Solid, granulation and sieving and classification again;
To sieve in advance and fractionated Al (OH)
31220 ℃ of down calcinings, further sieve again, classification, make varigrained tabular nanocrystalline corundum abrasive;
The inner micro-grain-size size of corundum abrasive is 120nm, and toughness is 3.36 ± 0.08MPam
1/2
The micro-grain-size of corundum abrasive is generally 0.2～5 μ m under the prior art, and toughness is 2.75～2.91MPam
1/2, and the micro-grain-size of corundum abrasive of the present invention is 40nm～2 μ m, toughness is 3.18～3.45MPam
1/2, reduced the inner micro-grain-size of corundum abrasive, and improved corundum abrasive toughness 9～25%.
The present invention is not limited to the foregoing description, and the variation of a lot of details is possible, but therefore this do not run counter to scope of the present invention and spirit.
Claims (4)
1. tabular nanocrystalline corundum abrasive of side, feed composition and weight percent content thereof are: 99.15～99.85%Al
2(SO
4)
318H
2O or Al (NO
3)
39H
2O, 0.15～0.85% additive;
The feed composition of said additive and weight percent content thereof are: 0～50% nanometer SiO
2, 0～45%Fe (NO
3)
3, 0～30%Y (NO
3)
3, 5～100%Ca (NO
3)
2, 0～70%Mg (NO
3)
2With 0～25%Cr (NO
3)
3
2. the preparation method of the tabular nanocrystalline corundum abrasive of six sides of claim 1 has following steps:
(1) with Al
2(SO
4)
318H
2O or Al (NO
3)
39H
2O is water-soluble, treats to dissolve fully after-filtration and removes impurity, is made into the Al of 0.1～0.6mol/L
3+Solution;
(2) adding ammoniacal liquor and stirring make its complete colloidal sol or depositionization in the solution of step (1), obtain Al (OH) through suction filtration, washing process again
3Gel;
(3) by feed composition and weight percent content thereof be: 99.15～99.85%Al
2(SO
4)
318H
2O or Al (NO
3)
39H
2O, the ratio of 0.15～0.85% additive joins the respective amount additive in the colloid in the step (2), and makes distribution of additives even;
(4) step (3) is contained the Al (OH) of additive
3Colloid is dry, again granulation and sieving and classification;
(5) with step (4) sieved with the fractionated abrasive material 1150 ℃～1400 ℃ calcinings, further sieve again and classification, make the tabular nanocrystalline corundum abrasive of six sides.
3. according to the preparation method of the tabular nanocrystalline corundum abrasive of six sides of claim 2, it is characterized in that the ammoniacal liquor of said step (2) is precipitation agent.
4. according to the preparation method of the tabular nanocrystalline corundum abrasive of six sides of claim 2, it is characterized in that the micro-grain-size in inside of the tabular Nano Alumina Abrasive of six sides that said step (5) makes is 40nm～2 μ m.
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|---|---|---|---|
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|---|---|---|---|
| CN2011103687962A CN102492394A (en) | 2011-11-18 | 2011-11-18 | Preparation method of hexagonal tabular nano-crystal corundum abrasive |
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|---|---|
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Family
ID=46184258
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732214A (en) * | 2012-06-20 | 2012-10-17 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN103242033A (en) * | 2013-04-27 | 2013-08-14 | 天津大学 | Ceramic corundum grinding material and preparation method thereof |
| CN105586005A (en) * | 2016-01-14 | 2016-05-18 | 洛阳三睿宝纳米科技有限公司 | Nano corundum abrasive and preparation method thereof |
| CN105645933A (en) * | 2016-01-18 | 2016-06-08 | 天津大学 | Sheet-structure ceramic corundum abrasive material and preparation method thereof |
| CN106083001A (en) * | 2016-06-17 | 2016-11-09 | 天津大学 | Nanocrystalline blue ceramic corundum abrasive and preparation method thereof |
| CN108531133A (en) * | 2018-06-05 | 2018-09-14 | 遵义市播州区铁厂创业刚玉有限责任公司 | A kind of preparation method of the nanocrystalline corundum abrasive of six square plates shape |
| CN109592971A (en) * | 2017-09-30 | 2019-04-09 | 天津大学 | A kind of fused alumina zirconia abrasive material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434829A (en) * | 2008-12-19 | 2009-05-20 | 天津大学 | Novel corundum abrasive and preparation thereof |
-
2011
- 2011-11-18 CN CN2011103687962A patent/CN102492394A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434829A (en) * | 2008-12-19 | 2009-05-20 | 天津大学 | Novel corundum abrasive and preparation thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732214A (en) * | 2012-06-20 | 2012-10-17 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN102732214B (en) * | 2012-06-20 | 2014-04-02 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN103242033A (en) * | 2013-04-27 | 2013-08-14 | 天津大学 | Ceramic corundum grinding material and preparation method thereof |
| CN105586005A (en) * | 2016-01-14 | 2016-05-18 | 洛阳三睿宝纳米科技有限公司 | Nano corundum abrasive and preparation method thereof |
| CN105586005B (en) * | 2016-01-14 | 2018-02-23 | 洛阳三睿宝纳米科技有限公司 | A kind of preparation method of Nano Alumina Abrasive |
| CN105645933A (en) * | 2016-01-18 | 2016-06-08 | 天津大学 | Sheet-structure ceramic corundum abrasive material and preparation method thereof |
| CN105645933B (en) * | 2016-01-18 | 2018-08-03 | 天津大学 | A kind of laminated structure Ceramic corundum abrasive and preparation method thereof |
| CN106083001A (en) * | 2016-06-17 | 2016-11-09 | 天津大学 | Nanocrystalline blue ceramic corundum abrasive and preparation method thereof |
| CN106083001B (en) * | 2016-06-17 | 2019-07-23 | 天津大学 | Nanocrystalline blue ceramic corundum abrasive and preparation method thereof |
| CN109592971A (en) * | 2017-09-30 | 2019-04-09 | 天津大学 | A kind of fused alumina zirconia abrasive material and preparation method thereof |
| CN108531133A (en) * | 2018-06-05 | 2018-09-14 | 遵义市播州区铁厂创业刚玉有限责任公司 | A kind of preparation method of the nanocrystalline corundum abrasive of six square plates shape |
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Application publication date: 20120613 |
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