CN102850084A - Preparation method for porous ceramic by using organic resin foaming microspheres as pore-forming agent - Google Patents
Preparation method for porous ceramic by using organic resin foaming microspheres as pore-forming agent Download PDFInfo
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- CN102850084A CN102850084A CN2012103433161A CN201210343316A CN102850084A CN 102850084 A CN102850084 A CN 102850084A CN 2012103433161 A CN2012103433161 A CN 2012103433161A CN 201210343316 A CN201210343316 A CN 201210343316A CN 102850084 A CN102850084 A CN 102850084A
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Abstract
The invention discloses a preparation method for porous ceramic by using organic resin foaming microspheres as pore-forming agent. The method includes following steps: preparing inorganic raw materials according to a weight ratio, additionally adding the organic resin foaming microspheres of 2-6% of the weight ratio and 10-40 micrometers and MC binder of 0.05-0.2% of the weight ratio, and preparing uniform powder; stirring while casting water of 6-10% of the total weight of the uniform powder, sieving with a 40 mesh screen and prilling, and pressing into samples with a hydraulic tablet press; and placing the samples in a drying oven for drying, and placing dried samples in an electric furnace for sample sintering. The porous ceramics prepared by the method is greatly improved in selectivity during filtering, application fields of the porous ceramic are greatly expanded, the porous ceramic with uniform aperture and controllable pore size can be produced by adopting the novel pore-forming agent, and sintering acceptance rate of products is greatly improved.
Description
Technical field
The present invention relates to the manufacturing field of special cermacis, be specially a kind of preparation method of the porous ceramics take the organic resin foam microspheres as pore-forming material.
Background technology
That porous ceramics has is high temperature resistant, high strength, the plurality of advantages such as corrosion-resistant, that the Porous-Organic filtering material is incomparable, therefore be widely used in industries such as environmental protection, chemical industry, particularly the product such as ceramic membrane, ceramic honeycomb filter has been pushed separating at high temperature, corrosive fluid separation, selective separation technology to a height especially in the application in the fields such as solid-liquid separation, the separation of liquid liquid, solid and gas separation.
The source of the pore in the porous ceramics is divided into two classes, and a class is to be formed by the particle packing of producing ceramic raw material; Another kind of is in the Production of Ceramics process, is added into organic pore-forming material in raw material, and in the product sintering process, organic pore-forming agents is burnouted stays pore.Pile up the size in one side aperture, hole and the grain composition that distribution range is subjected to raw material and restrict, only rely on the other hand pore capacity and the open porosity of piling up the hole product all can't meet the demands; The porous ceramics that the interpolation pore-forming material is produced has the advantages such as open porosity is high, pore size distribution is narrow, the easy control of mean pore size, and is adopted widely.But because also there is certain distribution range in the raw material particle size of pore-forming material, can limit the distribution range of open porosity; Added simultaneously organic pore-forming material in raw material, product can produce a large amount of heats owing to organic burning in sintering process, thereby easily forms internal stress at interiors of products, burns till cracking thereby product is produced.Therefore want to produce high-quality porous ceramics, just must have particle diameter evenly, the little high-quality pore-forming material of burning thermal value.
At present, the porous ceramics that in the production of porous ceramics, usually adopts organism powder that graphite, gac, flour, dextrin, yeast powder etc. can the high temperature after-flames to distribute as pore-forming material production different openings void content, different pore size.
Summary of the invention
Technical problem solved by the invention is to provide a kind of preparation method of the porous ceramics take the organic resin foam microspheres as pore-forming material; The method selects a kind of organic resin foam microspheres as the pore-forming material of producing porous ceramics, this pore-forming material is very uniformly nucleocapsid structure microballoon of a kind of granularity before foaming, shell is thermoplastic acrylic resin base polymer, kernel is alkanes gas, generally between 0.1 μ m-45 μ m, when being heated between 50 ℃-300 ℃ for this microballoon, alkanes gas can expand diameter, promote softening thermoplasticity shell, make several times to tens times of the rapid foaming and intumescings of microsphere volume.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of preparation method of the porous ceramics take the organic resin foam microspheres as pore-forming material, concrete steps are as follows:
(1) according to weight ratio configuration inorganic raw material: talcum powder 35%-45%, kaolin 35%-45%, aluminum oxide 15%-25%;
(2) in inorganic raw material, add the organic resin foam microspheres of 2%-6% weight ratio, 10-40 μ m and the MC binding agent of 0.05%-0.2% weight ratio, and make uniformed powder;
(3) then be sprinkled into while stirring the water of uniformed powder gross weight 6%-10%, with the granulation of sieving of 40 mesh sieves, be pressed into again the sample of 50mm*50mm*5mm with the hydraulic pressure tabletting machine;
(4) sample is put into 100 ℃ dry 3 hours of baking oven, the sample that drying is good is put into electric furnace again, carries out sample and burns till, firing period 12 hours, top temperature 1500 degree, soaking time 2 hours.
As preferably, described organic resin foam microspheres is vinylformic acid foamex microballoon.
Compare with conventional art, the present invention selects to have following beneficial effect with the Novel foaming microballoon as the production that pore-forming material carries out porous ceramics:
1, the particle diameter of foam microspheres homogeneous very, particle diameter between the product particle of same batch is poor to be no more than 5%, because the particle diameter of pore-forming material is even, the aperture of the open pore of the porous ceramics of producing also can be suitable evenly, the selectivity of the porous ceramics product of producing with this method when filtration will promote greatly.
2, the particle diameter of foam microspheres can be as required, control by the control blowing temperature, therefore use this type of pore-forming material to produce the porous ceramics product in any aperture to the requirement in porous ceramics aperture according to filtrate, thereby improved greatly the Application Areas of porous ceramics.
3, because the sheating material of pore-forming material foam microspheres is to have high-intensity acrylic resin, in the production process of porous ceramics, can not occur because mixing, the pug of powder tempered, the external force extruding that produces in the formed product process and foam microspheres is destroyed, so just can guarantee to adopt this novel pore-forming material can produce the aperture even, the porous ceramics that pore size is controlled.
4, because the circular structure that this novel pore-forming material is standard, compare with the irregular structure to distortion of pore-forming material in the past, the bridge formation performance of this novel pore-forming material is stronger, the open porosity of the porous ceramics of therefore producing just as the pore-forming material of volume can be high a lot, and the aperture difference of the different sites of every open pore also can be little a lot of simultaneously.
5, be the hollow form structure after this novel pore-forming material foaming, the thickness of the shell wall of the microballoon after every foaming is about 1/tens of sphere diameter, adopt this type of novel pore-forming material of equal volume to compare with pore-forming material in the past, the volume of the combustiblematerials in the novel pore-forming material only has 1/tens of pore-forming material in the past, product is in sintering process, because the internal stress that causes product to burn till cracking that the burning of pore-forming material produces will reduce greatly, thereby can improve greatly the sintering qualified rate of product.
Embodiment
In order to make technique means of the present invention, creation characteristic, workflow, using method reach purpose and effect is easy to understand, below further set forth the present invention.
Embodiment 1
With vinylformic acid foamex bead as the porous cordierite ceramics pore-forming material.
Configure the inorganic raw material of gross weight 500g according to the weight ratio of talcum powder 40%, kaolin 40%, aluminum oxide 20%, in inorganic raw material, add adding 4% weight ratio 30 μ m vinylformic acid foamex microballoons, and the MC binding agent of 0.1% weight ratio.Above all powder raw materials are fully mixed in Stainless steel basin by hand, then be sprinkled into while stirring the water of all powder raw material gross weights 8%, with 40 purposes sieves to the raw material that the has added water granulation of sieving, the raw material of making grain is pressed into the sample of 50mm*50mm*5mm with the hydraulic pressure tabletting machine, sample is put into 100 ℃ baking oven drying 3 hours, the sample that drying is good is put into electric furnace again, carrying out sample burns till, firing period 12 hours, top temperature 1500 degree, soaking time 2 hours.
The performance index of this test sample enter following table:
Simultaneous test
Select novel pore-forming material and pore-forming material graphite, flour, yeast powder in the past to prepare the simultaneous test of alumina porous ceramic.
Test recipe such as following table:
500g prepares burden according to the basic components total amount, load weighted various powder raw materials are mixed in Stainless steel basin by hand fully, the water that the powder limit is sprinkled into powder gross weight 8% is stirred on the limit afterwards, with 40 purpose screen clothes the raw material that mixes is carried out granulation again, the raw material of making grain is pressed into the sample of 50mm*50mm*5mm with the hydraulic pressure tabletting machine, engrave corresponding formula number at sample surfaces, put into 100 ℃ dry 3 hours of baking oven, the sample of prescription in 4 is put into electric furnace together, carrying out sample burns till, firing period 12 hours, top temperature 1500 degree, soaking time 2 hours.Properties of sample detects such as following table:
Above demonstration and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. the preparation method of the porous ceramics take the organic resin foam microspheres as pore-forming material, it is characterized in that: concrete steps are as follows:
(1) according to weight ratio configuration inorganic raw material: talcum powder 35%-45%, kaolin 35%-45%, aluminum oxide 15%-25%;
(2) in inorganic raw material, add the organic resin foam microspheres of 2%-6% weight ratio, 10-40 μ m and the MC binding agent of 0.05%-0.2% weight ratio, and make uniformed powder;
(3) then be sprinkled into while stirring the water of uniformed powder gross weight 6%-10%, with the granulation of sieving of 40 mesh sieves, be pressed into again the sample of 50mm*50mm*5mm with the hydraulic pressure tabletting machine;
(4) sample is put into 100 ℃ dry 3 hours of baking oven, the sample that drying is good is put into electric furnace again, carries out sample and burns till, firing period 12 hours, top temperature 1500 degree, soaking time 2 hours.
2. the preparation method of a kind of porous ceramics take the organic resin foam microspheres as pore-forming material according to claim 1, it is characterized in that: described organic resin foam microspheres is vinylformic acid foamex microballoon.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449840A (en) * | 2013-08-28 | 2013-12-18 | 北京中安四海节能环保工程技术有限公司 | Honeycomb ceramic carrier and preparation method thereof |
| CN104402458A (en) * | 2014-10-24 | 2015-03-11 | 彭红 | Thin-walled honeycomb ceramic carrier mud material and preparation method thereof |
| CN104876637A (en) * | 2015-05-25 | 2015-09-02 | 中航复合材料有限责任公司 | Fiber-reinforced pure inorganic flame retardant foam composite and preparation method thereof |
| CN110104624A (en) * | 2019-05-07 | 2019-08-09 | 湖南雅城新材料有限公司 | The preparation method of porous calcium phosphate iron |
| CN110759746A (en) * | 2019-08-02 | 2020-02-07 | 宜兴王子制陶有限公司 | Gasoline engine particle filter with low back pressure and high durability |
| CN111592332A (en) * | 2020-06-05 | 2020-08-28 | 深圳职业技术学院 | Environment-friendly heat-insulation core material and preparation method thereof |
| CN111892384A (en) * | 2020-08-18 | 2020-11-06 | 重庆奥福精细陶瓷有限公司 | Wall-flow cordierite gasoline particle filter and preparation method thereof |
| CN111892385A (en) * | 2020-08-18 | 2020-11-06 | 重庆奥福精细陶瓷有限公司 | Preparation method of large-size diesel particle filter |
| CN112707718A (en) * | 2020-12-28 | 2021-04-27 | 快思瑞科技(上海)有限公司 | Lightweight porous ceramic and preparation method thereof |
| CN112939585A (en) * | 2021-04-09 | 2021-06-11 | 湖北中烟工业有限责任公司 | Al (aluminum)2O3Preparation method and application of porous ceramic |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449840A (en) * | 2013-08-28 | 2013-12-18 | 北京中安四海节能环保工程技术有限公司 | Honeycomb ceramic carrier and preparation method thereof |
| CN104402458A (en) * | 2014-10-24 | 2015-03-11 | 彭红 | Thin-walled honeycomb ceramic carrier mud material and preparation method thereof |
| CN104876637A (en) * | 2015-05-25 | 2015-09-02 | 中航复合材料有限责任公司 | Fiber-reinforced pure inorganic flame retardant foam composite and preparation method thereof |
| CN110104624A (en) * | 2019-05-07 | 2019-08-09 | 湖南雅城新材料有限公司 | The preparation method of porous calcium phosphate iron |
| CN110759746A (en) * | 2019-08-02 | 2020-02-07 | 宜兴王子制陶有限公司 | Gasoline engine particle filter with low back pressure and high durability |
| CN111592332A (en) * | 2020-06-05 | 2020-08-28 | 深圳职业技术学院 | Environment-friendly heat-insulation core material and preparation method thereof |
| CN111892384A (en) * | 2020-08-18 | 2020-11-06 | 重庆奥福精细陶瓷有限公司 | Wall-flow cordierite gasoline particle filter and preparation method thereof |
| CN111892385A (en) * | 2020-08-18 | 2020-11-06 | 重庆奥福精细陶瓷有限公司 | Preparation method of large-size diesel particle filter |
| CN112707718A (en) * | 2020-12-28 | 2021-04-27 | 快思瑞科技(上海)有限公司 | Lightweight porous ceramic and preparation method thereof |
| CN112939585A (en) * | 2021-04-09 | 2021-06-11 | 湖北中烟工业有限责任公司 | Al (aluminum)2O3Preparation method and application of porous ceramic |
| CN112939585B (en) * | 2021-04-09 | 2022-03-04 | 湖北中烟工业有限责任公司 | Al (aluminum)2O3Preparation method and application of porous ceramic |
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Application publication date: 20130102 |