CN103242033A - Ceramic corundum grinding material and preparation method thereof - Google Patents
Ceramic corundum grinding material and preparation method thereof Download PDFInfo
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- CN103242033A CN103242033A CN2013101522790A CN201310152279A CN103242033A CN 103242033 A CN103242033 A CN 103242033A CN 2013101522790 A CN2013101522790 A CN 2013101522790A CN 201310152279 A CN201310152279 A CN 201310152279A CN 103242033 A CN103242033 A CN 103242033A
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- abrasive
- corundum abrasive
- corundum
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- ceramic corundum
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Abstract
The invention discloses a ceramic corundum grinding material and a method thereof. The ceramic corundum grinding material comprises the following raw materials in percentage by weight: 95.00%-99.5% of Al (NO3)3.9H2O and 0.50%-5.00% of additives, wherein the additives include 3.53%-7.39% of H3BO3, 82.39%-85.04% of tetraethyl orthosilicate named as TEOS for short and 10.22%-11.43% of Ba(NO3)2. The ceramic corundum grinding material disclosed by the invention is obtained by adopting a sol-gel technology and utilizing a two-step sintering method. The method disclosed by the invention optimizes the microstructure of the ceramic corundum grinding material and enhances the mechanical property of the ceramic corundum grinding material.
Description
Technical field
The invention belongs to a kind of is the ceramic composition of feature with the composition, especially relates to a kind of ceramic corundum abrasive for ground finish (SG abrasive material) and preparation method thereof.
Background technology
Abrasive material has irreplaceable effect in industrial application, be accompanied by industry and continuous progress in science and technology, and the use range of abrasive material is increasing, and its performance requriements is also improved gradually.The pottery corundum abrasive prepares with sol-gel method, therefore can make abrasive material reach homogeneity on the chemical composition, replaced fusion preparation technology with sintering process simultaneously, made that this abrasive material is a kind of polycrystalline sintered compact of potteryization, the hardness of abrasive material and toughness etc. are increased substantially.The ceramic corundum abrasive for preparing with this wet chemical method of sol-gel microstructure, grinding performance, toughness etc. many aspect performance be better than traditional fusion corundum abrasive; When being prepared into the grinding tool use, also show good comprehensive performances, the abrasive particle of ceramic corundum abrasive is sharp, excellent cutting performance, the grinding efficiency height can carry out big cutting-in, roughing feed and high efficient grinding; Self-sharpening is good, can constantly expose the face of tool that makes new advances, and makes emery wheel keep grinding stability; Price is far below high-grade abrasive materials such as CBN and diamonds; The grinding tool versatility is good; Low in energy consumption, thermal value is few, is difficult for the burn workpiece; The grinding tool wearing quality is good, can reduce the non-ground finish time in a large number, improves its service efficiency greatly.
Yet, because the sintering of pure alumina diffusion activation energy is higher, be difficult to sintering under the low temperature, excessive temperature easily causes the misgrowth of crystal grain again, porosity improves, and destroys homogeneity, the compactness of its microtexture, and then damages its performance, therefore, how by optimize to improve the important content that its microstructural performance is ceramic corundum abrasive research always.
Summary of the invention
Purpose of the present invention, it is the shortcoming and defect that overcomes prior art, based on sol-gel technique, adopt the method for two-step sintering to prepare ceramic corundum abrasive, provide a kind of microscopic appearance controlled, improve a kind of ceramic corundum abrasive and preparation method thereof of its product mechanics and grinding performance simultaneously.
The present invention is achieved by following technical solution.
A kind of ceramic corundum abrasive, its raw material is formed and mass percentage content is 95.00%～99.5%Al (NO
3)
39H
2O, 0.50%～5.00% additive; Described additive is 3.53～7.39%H
3BO
3, 82.39～85.04% tetraethoxys are called for short TEOS and 10.22～11.43%Ba (NO
3)
2;
The preparation method of this pottery corundum abrasive, concrete steps are as follows:
(1) adopts industrial nitric acid aluminium Al (NO
3)
39H
2O is raw material, and water-soluble after-filtration is removed impurity, is made into the solution that aluminium ion concentration is 0.2～0.4mol/L;
(2) in the aqueous solution of step (1), splash into ammonia soln, and stir and to make its complete gelation, regulate pH between 9～10, suction filtration then, washing obtains Al (OH)
3Gel;
(3) additive being added in the gel of step (2), is that medium uses the corundum abrading-ball with its abundant mixing with ethanol, then that mixture is dry under 60 ℃, obtains sieving the acquisition dry gel particle again behind the xerogel.
(4) dry gel particle with step (3) burns till prior to 1150～1350 ℃, is cooled to 1000～1150 ℃ more rapidly, and is incubated 0～5h, to be cooled to the room temperature again through screening, obtain varigrained corundum abrasive.
The ammonia soln of described step (2) is the ammonia soln of 0.1mol/L.
The granularity of the dry gel particle after described step (3), step (4) screening is 60～80 orders.
The corundum abrasive internal microstructure of described step (4) is tabular, final abrasive material controllable shapes; Abrasive material internal microstructure grain-size is in 3um; The single particle average strength is 50N.
The present invention can effectively control grain-size according to the change of sintering temperature, to satisfy in the practical application demand to the different-grain diameter corundum abrasive; Compared with prior art, improve the ultimate compression strength of corundum abrasive single particle, further optimized internal microstructure simultaneously.
Description of drawings
Fig. 1 is the pattern photo (field emission scanning electron microscope, FESEM, JEOL JSM-6700F) of the corundum abrasive of the embodiment of the invention 1.
Fig. 2 is the XRD spectral line (RIGAKU/DMAX2500, Japan's meeting of science) of the corundum abrasive of the embodiment of the invention 1.
Embodiment
The present invention adopts sol-gel technique, utilizes the method for two-step sintering to prepare ceramic corundum abrasive, below in conjunction with specific embodiment the present invention is further described.
It is raw material that the embodiment of the invention all adopts industrial nitric acid aluminium, and the ammoniacal liquor of 0.1mol/L is precipitation agent, and table 1 is seen for details in the manufacturer of various raw materials.
Table 1
Be that example describes with preparation 4g corundum abrasive below, the mass percentage content of forming according to the raw material of ceramic corundum abrasive is 95.00%～99.5%Al (NO
3)
39H
2O, 0.50%～5.00% additive is prepared burden, and described additive is 3.53～7.39%H
3BO
3, 82.39～85.04% tetraethoxys are called for short TEOS and 10.22～11.43%Ba (NO
3)
2
Embodiment 1
At first with an amount of industrial nitric acid aluminium Al (NO
3)
39H
2O is water-soluble, and elimination impurity also is made into the solution that aluminium ion concentration is 0.3mol/L;
Splash into ammoniacal liquor in above-mentioned solution, and stir and to make its complete gelation, regulating the pH value is 9.3, again through suction filtration, wash Al (OH)
3Wet gel;
The additive of 4.00% (0.16g) is added above-mentioned gained Al (OH)
3In the wet gel, be medium with ethanol with the corundum abrading-ball with its abundant mixing: the composition of described additive and mass percent are 3.53%H
3BO
3, 11.43%Ba (NO
3)
2, 85.04%TEOS;
The wet gel that will contain additive 60 ℃ dry down, obtain sieving again behind the xerogel and obtain 60～80 purpose dry gel particles;
With the Al (OH) that sieves and classification obtains
3Dry gel particle burns 1250 ℃ earlier, is cooled to 1150 ℃ then rapidly, and calcines under the insulation 5h, and further screening obtains 60～80 purpose new ceramics corundum abrasives again.
Fig. 1, Fig. 2 are respectively that the Electronic Speculum pattern of embodiment 1 and XRD characterize, with reference to the accompanying drawings shown in, can obtain in the sample abrasive material with the standard card contrast all is α-Al
2O
3Crystalline phase (corundum); The corundum abrasive internal microstructure is tabular, final abrasive material controllable shapes; Abrasive material internal microstructure grain-size is in 3um; The single particle average strength is 50N.
Embodiment 2
At first with an amount of industrial nitric acid aluminium Al (NO
3)
39H
2O is water-soluble, and elimination impurity also is made into the solution that aluminium ion concentration is 0.3mol/L;
Splash into ammoniacal liquor in above-mentioned solution, and stir and to make its complete gelation, regulating the pH value is 9.5, again through suction filtration, wash Al (OH)
3Wet gel;
The additive of 4.00% (0.16g) is added Al (OH)
3In the wet gel, be medium with ethanol with the corundum abrading-ball with its abundant mixing: the composition of described additive and mass percent are 3.53%H
3BO
3, 11.43%Ba (NO
3)
2, 85.04%TEOS;
The wet gel that will contain additive 60 ℃ dry down, obtain sieving again behind the xerogel and obtain 60～80 purpose dry gel particles;
With the Al (OH) that sieves and classification obtains
3Dry gel particle burns 1300 ℃ earlier, is cooled to 1150 ℃ and be incubated 5h more rapidly, and further screening obtains the new ceramics corundum abrasive of 60～80 purposes again.
Embodiment 3
At first with an amount of industrial nitric acid aluminium Al(NO
3)
39H
2O is water-soluble, and elimination impurity also is made into the solution that aluminium ion concentration is 0.3mol/L;
Splash into ammoniacal liquor in above-mentioned solution, and stir and to make its complete gelation, regulating the pH value is 9.5, again through suction filtration, wash Al (OH)
3Wet gel;
The additive of 1.50% (0.06g) is added Al (OH)
3In the wet gel, be medium with ethanol with the corundum abrading-ball with its abundant mixing: the composition of described additive and mass percent are 7.39%H
3BO
3, 10.22%Ba (NO
3)
2, 82.39%TEOS;
The wet gel that will contain additive 60 ℃ dry down, obtain sieving again behind the xerogel and obtain 60～80 purpose dry gel particles;
With the Al (OH) that sieves and classification obtains
3Dry gel particle burns 1300 ℃ earlier, is cooled to 1150 ℃ and be incubated 3h more rapidly, and further screening obtains 60～80 purpose new ceramics corundum abrasives again.
Embodiment 4
At first with an amount of industrial nitric acid aluminium Al(NO
3)
39H
2O is water-soluble, and elimination impurity also is made into the solution that aluminium ion concentration is 0.3mol/L;
Splash into ammoniacal liquor in above-mentioned solution, and stir and to make its complete gelation, regulating the pH value is 9.5, again through suction filtration, wash Al (OH)
3Wet gel;
The additive of 1.50% (0.06g) is added Al (OH)
3In the wet gel, be medium with ethanol with the corundum abrading-ball with its abundant mixing: the composition of described additive and mass percent are 7.39%H
3BO
3, 10.22%Ba (NO
3)
2, 82.39%TEOS;
The wet gel that will contain additive 60 ℃ dry down, obtain sieving again behind the xerogel and obtain 60～80 purpose dry gel particles;
With the Al (OH) that sieves and classification obtains
3Dry gel particle burns 1250 ℃ earlier, is cooled to 1150 ℃ and be incubated 3h more rapidly, and further screening obtains 60～80 purpose new ceramics corundum abrasives again.
More than the present invention has been done the description of exemplary, should be noted that the present invention be not limited to above-mentioned several in implementation process, the variation of a lot of details is possible, does not therefore run counter to spirit of the present invention.
Claims (4)
1. ceramic corundum abrasive, its raw material is formed and mass percentage content is 95.00%～99.5%Al (NO
3)
39H
2O, 0.50%～5.00% additive; Described additive is 3.53～7.39%H
3BO
3, 82.39～85.04% tetraethoxys are called for short TEOS and 10.22～11.43%Ba (NO
3)
2;
The preparation method of this pottery corundum abrasive, concrete steps are as follows:
(1) adopts industrial nitric acid aluminium Al(NO
3)
39H
2O is raw material, and water-soluble after-filtration is removed impurity, is made into the solution that aluminium ion concentration is 0.2～0.4mol/L;
(2) in the aqueous solution of step (1), splash into ammonia soln, and stir and to make its complete gelation, regulate pH between 9～10, suction filtration then, washing obtains Al (OH)
3Gel;
(3) additive being added in the gel of step (2), is that medium uses the corundum abrading-ball with its abundant mixing with ethanol, then that mixture is dry under 60 ℃, obtains sieving the acquisition dry gel particle again behind the xerogel.
(4) dry gel particle with step (3) burns till prior to 1150～1350 ℃, is cooled to 1000～1150 ℃ more rapidly, and is incubated 0～5h, to be cooled to the room temperature again through screening, obtain varigrained corundum abrasive.
2. according to a kind of ceramic corundum abrasive of claim 1, it is characterized in that the ammonia soln of described step (2) is the ammonia soln of 0.1mol/L.
3. according to a kind of ceramic corundum abrasive of claim 1, it is characterized in that the granularity of the dry gel particle after described step (3), step (4) screening is 60～80 orders.
4. according to a kind of ceramic corundum abrasive of claim 1, it is characterized in that the corundum abrasive internal microstructure of described step (4) is tabular, final abrasive material controllable shapes; Abrasive material internal microstructure grain-size is in 3um; The single particle average strength is 50N.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107814560A (en) * | 2017-09-30 | 2018-03-20 | 江苏金石研磨有限公司 | A kind of ceramic grinding ball rolls shaping composite fortifier and preparation method thereof and its application method |
| CN108610025A (en) * | 2018-05-30 | 2018-10-02 | 遵义市播州区铁厂创业刚玉有限责任公司 | A kind of Ceramic corundum abrasive |
Citations (4)
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|---|---|---|---|---|
| CN101434829A (en) * | 2008-12-19 | 2009-05-20 | 天津大学 | Novel corundum abrasive and preparation thereof |
| CN102492394A (en) * | 2011-11-18 | 2012-06-13 | 天津大学 | Preparation method of hexagonal tabular nano-crystal corundum abrasive |
| CN102732214A (en) * | 2012-06-20 | 2012-10-17 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN102775135A (en) * | 2012-07-11 | 2012-11-14 | 天津大学 | Novel ceramic corundum abrasive |
-
2013
- 2013-04-27 CN CN2013101522790A patent/CN103242033A/en active Pending
Patent Citations (4)
| 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 |
| CN102492394A (en) * | 2011-11-18 | 2012-06-13 | 天津大学 | Preparation method of hexagonal tabular nano-crystal corundum abrasive |
| CN102732214A (en) * | 2012-06-20 | 2012-10-17 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN102775135A (en) * | 2012-07-11 | 2012-11-14 | 天津大学 | Novel ceramic corundum abrasive |
Non-Patent Citations (1)
| Title |
|---|
| 张孝文: "《固体材料结构基础》", 31 July 1980 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107814560A (en) * | 2017-09-30 | 2018-03-20 | 江苏金石研磨有限公司 | A kind of ceramic grinding ball rolls shaping composite fortifier and preparation method thereof and its application method |
| CN108610025A (en) * | 2018-05-30 | 2018-10-02 | 遵义市播州区铁厂创业刚玉有限责任公司 | A kind of Ceramic corundum abrasive |
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Application publication date: 20130814 |