CN105330330A - Preparation method of ZrB2-Al2O3 foamed ceramics - Google Patents
Preparation method of ZrB2-Al2O3 foamed ceramics Download PDFInfo
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- CN105330330A CN105330330A CN201510630895.1A CN201510630895A CN105330330A CN 105330330 A CN105330330 A CN 105330330A CN 201510630895 A CN201510630895 A CN 201510630895A CN 105330330 A CN105330330 A CN 105330330A
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Abstract
The invention discloses a preparation method of ZrB2-Al2O3 foamed ceramics. The preparation method comprises the steps: with a ZrB2 micro-powder and an Al2O3 micro-powder as main raw materials, adding an organic monomer and a crosslinking agent, fully mixing and ball-milling in deionized water, dipping polyurethane foamed plastics in the ZrB2-Al2O3 slurry, repeatedly rolling and kneading, making the slurry attached on the formed plastics, curing and drying, then carrying out high-temperature sintering, and forming the ZrB2-Al2O3 foamed ceramics. The method makes the gel casting and the polyurethane foaming process combined, and provides a new preparation process for the ZrB2-Al2O3 foamed ceramics.
Description
Technical field
The invention belongs to field of inorganic materials, be related specifically to a kind of preparation method of ZrB2-Al2O3 foamed ceramics.
Background technology
Zirconium boride 99.5004323A8ure (ZrB2) pottery has high fusing point, the high wear resistance obtaining chemical stability, high rigidity and excellence.ZrB2 also has the chemical erosions such as high thermal conductivity, good heat-shock resistance and excellent anti-slag, molten steel erosion and excellent anti-HCl, HF except property in addition.
One of stupalith that time aluminum oxide (Al2O3), current turnout maximum application is the widest, is mainly used in the fields such as abrasive material, cutter, wear parts, biological ceramics, aerospace and chemical.But it is poor that its shortcoming is heat-shock resistance, easy to crack under thermal shocking effect.Make it have complementary advantages ZrB2 and the Al2O3 compound of high rigidity, high thermal conductivity and good thermal shock, the application of this matrix material will be more wide.
Summary of the invention
For solving the problem, the invention provides a kind of preparation method of ZrB2-Al2O3 foamed ceramics.
The object of the invention to solve the technical problems realizes by the following technical solutions.The preparation method of a kind of ZrB2-Al2O3 foamed ceramics proposed according to the present invention, it comprises following steps: with ZrB2 and Al2O3 micro mist for main raw material, add organic monomer and linking agent abundant mixing and ball milling in deionized water, urethane foam is immersed in ZrB2-Al2O3 slip, rub with the hands by repeatedly leveling kneadding with a roller, make slip adhere on porous plastics, after solidification is dry, high temperature sintering forms ZrB2-Al2O3 foamed ceramics.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The preparation method of aforesaid a kind of ZrB2-Al2O3 foamed ceramics, in described ZrB2 micro mist, ZrB2 content is 92-95%, and powder size is 1-3 μm; In described Al2O3 micro mist, Al2O3 content is 99.5-99.7%, and powder size is 1-2 μm.
The preparation method of aforementioned a kind of ZrB2-Al2O3 foamed ceramics, described monomer is acrylamide (AM), linking agent is methylene-bisacrylamide (MBAM), dispersion agent is ammonium polyacrylate (PAA-NH4), and initiator is ammonium persulphate (APS).
Gel injection combines with polyurethane foam technique by the method, and the preparation for ZrB2-Al2O3 foamed ceramics provides a kind of novel method.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
1. configure premixed liquid: be dissolved in deionized water by organic monomer, linking agent and dispersion agent, organic monomer add-on is 15% of deionized water quality, and the ratio 5 of monomer and linking agent is chosen.∶1
2. mixing and ball milling: above-mentioned premixed liquid and zirconium boride 99.5004323A8ure, alumina powder are put into ball mill fully mixing and ball milling, and regulating pH value extremely with ammoniacal liquor, ZrB2 and Al2O3 content is than being 5:1, and employing zirconia ball is ball-milling medium, Ball-milling Time is 5 hours, ratio of grinding media to material: 1: 1 ~ 3: 1.
3. vacuum stripping: add appropriate initiator A PS and catalyzer TEMED again, mix rear use vacuum mixer and be evacuated to 0.1Mpa, the degasification time is 10 minutes.
4. polyurethane foam: be immersed in by urethane foam in ZrB2-Al2O3 slip, rub with the hands by repeatedly leveling kneadding with a roller, make ZrB2-Al2O3 slip fully adhere to urethane foam on the surface, it is shaping that slip gets final product gel solidification.
5. dry: after slurry gel solidification, to be placed in air, at ambient temperature seasoning 24 hours, to be then placed in baking oven and to dry further under 120 DEG C of conditions.
6. high temperature sintering: the base substrate after oven dry is at about 800 DEG C vacuum degreasing insulation about 1h, then it is shaping to be slowly warming up to 1750 DEG C-1850 DEG C insulation 1h Ar-sinterings.
Embodiment 2
1. configure premixed liquid: be dissolved in deionized water by organic monomer, linking agent and dispersion agent, organic monomer add-on is 20% of deionized water quality, and the ratio of monomer and linking agent gets 7: 1.
2. mixing and ball milling: above-mentioned premixed liquid and zirconium boride 99.5004323A8ure, alumina powder are put into ball mill fully mixing and ball milling, and regulating pH value extremely with ammoniacal liquor, ZrB2 and Al2O3 content is than being 5:1, and employing zirconia ball is ball-milling medium, Ball-milling Time is 7 hours, ratio of grinding media to material: 1: 1 ~ 3: 1.
3. vacuum stripping: add appropriate initiator A PS and catalyzer TEMED again, mix rear use vacuum mixer and be evacuated to 0.1Mpa, the degasification time is 20 minutes.
4. polyurethane foam: be immersed in by urethane foam in ZrB2-Al2O3 slip, rub with the hands by repeatedly leveling kneadding with a roller, make ZrB2-Al2O3 slip fully adhere to urethane foam on the surface, it is shaping that slip gets final product gel solidification.
5. dry: after slurry gel solidification, to be placed in air, at ambient temperature seasoning 24 hours, to be then placed in baking oven and to dry further under 130 DEG C of conditions.
6. high temperature sintering: the base substrate after oven dry is at about 800 DEG C vacuum degreasing insulation about 1h, then it is shaping to be slowly warming up to 1750 DEG C-1850 DEG C insulation 1h Ar-sinterings.
Embodiment 3
1. configure premixed liquid: be dissolved in deionized water by organic monomer, linking agent and dispersion agent, organic monomer add-on is 25% of deionized water quality, and the ratio of monomer and linking agent chooses 10: 1.
2. mixing and ball milling: above-mentioned premixed liquid and zirconium boride 99.5004323A8ure, alumina powder are put into ball mill fully mixing and ball milling, and regulating pH value extremely with ammoniacal liquor, ZrB2 and Al2O3 content is than being 5:1, and employing zirconia ball is ball-milling medium, Ball-milling Time is 10 hours, ratio of grinding media to material: 1: 1 ~ 3: 1.
3. vacuum stripping: add appropriate initiator A PS and catalyzer TEMED again, mix rear use vacuum mixer and be evacuated to 0.1Mpa, the degasification time is 30 minutes.
4. polyurethane foam: be immersed in by urethane foam in ZrB2-Al2O3 slip, rub with the hands by repeatedly leveling kneadding with a roller, make ZrB2-Al2O3 slip fully adhere to urethane foam on the surface, it is shaping that slip gets final product gel solidification.
5. dry: after slurry gel solidification, to be placed in air, at ambient temperature seasoning 24 hours, to be then placed in baking oven and to dry further under 120 ~ 150 DEG C of conditions.
6. high temperature sintering: the base substrate after oven dry is at about 800 DEG C vacuum degreasing insulation about 1h, then it is shaping to be slowly warming up to 1750 DEG C-1850 DEG C insulation 1h Ar-sinterings.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (3)
1. the preparation method of a ZrB2-Al2O3 foamed ceramics, it is characterized in that, it comprises following steps: with ZrB2 and Al2O3 micro mist for main raw material, add organic monomer and linking agent abundant mixing and ball milling in deionized water, urethane foam is immersed in ZrB2-Al2O3 slip, rubbing with the hands by repeatedly leveling kneadding with a roller, making slip adhere on porous plastics, after solidification is dry, high temperature sintering forms ZrB2-Al2O3 foamed ceramics.
2. the preparation method of a kind of ZrB2-Al2O3 foamed ceramics according to claim 1, it is characterized in that, in described ZrB2 micro mist, ZrB2 content is 92-95%, and powder size is 1-3 μm; In described Al2O3 micro mist, Al2O3 content is 99.5-99.7%, and powder size is 1-2 μm.
3. the preparation method of a kind of ZrB2-Al2O3 foamed ceramics according to claim 1, it is characterized in that, described monomer is acrylamide, linking agent is methylene-bisacrylamide, and dispersion agent is ammonium polyacrylate, and initiator is ammonium persulphate.
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| CN201510630895.1A CN105330330A (en) | 2015-09-29 | 2015-09-29 | Preparation method of ZrB2-Al2O3 foamed ceramics |
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| CN201510630895.1A CN105330330A (en) | 2015-09-29 | 2015-09-29 | Preparation method of ZrB2-Al2O3 foamed ceramics |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486774A (en) * | 2003-07-25 | 2004-04-07 | 湖南泰鑫瓷业有限公司 | Filtering ceramic net for high temperature precise casting |
| CN102000458A (en) * | 2010-10-19 | 2011-04-06 | 北京航空航天大学 | Yttria foamed ceramic filter and preparation method thereof |
| CN102584240A (en) * | 2012-01-17 | 2012-07-18 | 哈尔滨工业大学 | Sintering method of ZrB2-SiC superhigh temperature ceramics |
| CN104876551A (en) * | 2015-03-19 | 2015-09-02 | 南京理工大学 | Intragranular particle (ZrB2/Al2O3) and preparation device and method |
| CN105036751A (en) * | 2015-09-06 | 2015-11-11 | 哈尔滨工业大学 | Method for preparing ceramic through micro-nano grain-size grading |
-
2015
- 2015-09-29 CN CN201510630895.1A patent/CN105330330A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486774A (en) * | 2003-07-25 | 2004-04-07 | 湖南泰鑫瓷业有限公司 | Filtering ceramic net for high temperature precise casting |
| CN102000458A (en) * | 2010-10-19 | 2011-04-06 | 北京航空航天大学 | Yttria foamed ceramic filter and preparation method thereof |
| CN102584240A (en) * | 2012-01-17 | 2012-07-18 | 哈尔滨工业大学 | Sintering method of ZrB2-SiC superhigh temperature ceramics |
| CN104876551A (en) * | 2015-03-19 | 2015-09-02 | 南京理工大学 | Intragranular particle (ZrB2/Al2O3) and preparation device and method |
| CN105036751A (en) * | 2015-09-06 | 2015-11-11 | 哈尔滨工业大学 | Method for preparing ceramic through micro-nano grain-size grading |
Non-Patent Citations (1)
| Title |
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| 唐竹兴 等: "ZrB2-Al2O3泡沫陶瓷的研制", 《硅酸盐通报》 * |
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Application publication date: 20160217 |