CN104014195B - A kind of preparation method of coating composite ceramic filter core - Google Patents
A kind of preparation method of coating composite ceramic filter core Download PDFInfo
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- CN104014195B CN104014195B CN201410188171.1A CN201410188171A CN104014195B CN 104014195 B CN104014195 B CN 104014195B CN 201410188171 A CN201410188171 A CN 201410188171A CN 104014195 B CN104014195 B CN 104014195B
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Abstract
The invention discloses a kind of preparation method of coating composite ceramic filter core, this preparation method adopts the raw material of low melting point, and adopt the method for first flocculation after dispersion to prepare coating slurry, raw material in coating and aperture height are uniformly dispersed, coating process adopts the mode of dipping or spraying by slurry coating on composite ceramic filter core surface, uniform coating thickness, the associativity of coating and base substrate is good, sintering temperature, not higher than 950 DEG C, can not make the natural micropore in diatomite cave in because of high temperature sintering.
Description
Technical field
The present invention relates to a kind of preparation method of coating composite ceramic filter core, particularly relate to a kind of preparation method that can be used for directly drinking the high-accuracy coating composite ceramic filter core of type water filtration device.
Background technology
The pollutant of drinking water mainly contains bacterium (such as Escherichia coli), organic matter (such as containing chlorohydrocarbon, benzene-like compounds) and heavy metal ion (such as plumbous, cadmium).Our running water used in everyday is in sterilisation process, part organic matter and free chlorine combine and form carcinogenic organic chloride (as chloroform), in this Outer Tube, microorganism also can breed again, these all have impact on the quality of water, and therefore general needs can drink through being further purified process.The water that the applicable mankind drink is not more pure better, and trace element plays vital effect in the growth course of people's bone, nervous system, metabolic system etc., and these trace elements mainly draw from drinking water.Therefore, in water treatment procedure, these useful mineral matters to be retained as far as possible.Existing ceramic water purification apparatus can while removal bacterium, organic matter, heavy metal ion, and retain the trace element that human body is necessary, therefore family's drinking water purification device is done in extensive use.
The crucial filter element of ceramic water purification apparatus is ceramic element, is by the porous filter elements of ceramic powder through high temperature sintering.Different from macromolecule reverse osmosis membrane and hollow fiber filtering membrane, ceramic element adopts in-depth filtration principle to remove impurity, the channel diameter of water distributes between 0.1 ~ 10 μm, little aperture has absolute prevention ability for bacterium, the introducing of antiseptic then can prevent bacterium growing in filter core, therefore reliable by the quality safety of the water of filter core; And large aperture can ensure that filter core has little resistance and large flux, significant to the practicality of filter core.
The Doulton company of Britain is the ceramic element manufacturer that the whole world is maximum and the most well-known at present, and it is primary raw material with diatomite, forms porous filter elements through high temperature sintering.Diatomite is made up of diatom remains, and main component is silica (80 ~ 95%), and remaining composition is mainly aluminium oxide.Diatom is originally as loose structure, and the aperture of the aperture of inner very regular arrangement is generally between 0.1 ~ 0.3 μm, therefore has very excellent filtration and adsorption capacity.In order to improve filter effect, require that diatomaceous content is high as far as possible.But because diatomite plasticity is low, too high levels will seriously reduce its forming ability, therefore add clay to improve plasticity and forming ability in forming process, but this is to reduce filter effect for cost realization.This water purifier both can be arranged on home-use ordinary faucet, for urban family, gravity-type purifier also can being adopted to produce pure water, using not having the place of running water.After filtration can incrustation scale in filtering water, the malignant bacteria such as Escherichia coli, cysticercus.Remove the chlorine, remains of pesticide, harmful organic substance etc. in water by the charcoal part be contained in filter core, reach drinking water standard, do not need just can directly drink through heating.But because the adsorption rate of charcoal is limited, therefore in time being applied on straight drink machine, adsorption effect is not very good.In order to address this problem, the HintonInternational company of Doulton company subordinate develops
black ceramic filter core.It adds a certain amount of charcoal in the forming process of original ceramic element, makes it be dispersed in ceramic element, significantly improve contact area, thus avoid water not flow through charcoal causing charcoal " short circuit ", ineffective.Compare with in-built charcoal, this filter core adsorption rate significantly improves, and saturated extent of adsorption also significantly improves.This is mainly because in composite filter element, and charcoal is evenly distributed between diatomite ceramic particle, utilizes diatomaceous fine structure, the contact area of charcoal and water is significantly increased, improves adsorption rate.Due to charcoal and diatomaceous acting in conjunction, facilitate organic catalytic decomposition, cause significantly improving of total adsorbance.The clearance of this ceramic element bacterium reaches more than 99.9%, and harmful organic substance is removed general also all more than 95%, and the removal of heavy metal ion is more than 85%.In addition, if by filter core through transshipping silver process, introduce a small amount of silver ion, the growing of bacterium in filter core after Long-Time Service can be suppressed.But,
black ceramic filter core is in preparation process, its sintering temperature is 1020 ~ 1200 DEG C, higher than 1000 DEG C, and existing research has shown, when sintering temperature is higher than 1000 DEG C, natural micropore in diatomite can merge because of partially sintering, and causes the water flux of diatomaceous filter efficiency and filter core to reduce simultaneously.Therefore, in order to prevent above-mentioned phenomenon from occurring, be necessary the sintering temperature reducing green compact.
Due to active carbon and diatomaceous sintering character poor, the intensity of the ceramic element containing active carbon is general all lower, in use easily occurs that surface dust comes off, the phenomenon of ceramic element fracture.Therefore, the intensity improving ceramic element is necessary.
Summary of the invention
The present invention aims to provide a kind of novel preparation method containing the composite ceramic filter core of diatomite and charcoal, to solve the above-mentioned problems in the prior art.
The object of the invention is based on following technical scheme realize:
A preparation method for coating composite ceramic filter core, comprises the steps:
1) diatomite material adopts the super-cell through high-temperature calcination, particle mean size is 20-40 μm, diatomite, dispersant and deionized water are joined in ball grinder, the slurry that ball milling uniformly distributes, the weight ratio of the diatomite used, dispersant and deionized water is 1000:1 ~ 20:1000 ~ 2000;
2) by flocculant and and stabilizing agent join in the slurry obtained in step 1, flocculant addition is that the diatomite of step 1 and dispersant use 0.2 ~ 3% of gross weight; Stabilizing agent addition is the diatomite of step 1 and 1 ~ 10% of dispersant use gross weight; Continue ball milling make flocculant and stabilizing agent in the slurry dispersed, the rotating speed of ball milling is 60rpm ~ 150rpm, continue Ball-milling Time be 0.5 ~ 3 hour, flocculant and stabilizing agent are mixed in the slurry, obtain the slurry of stable partial flocculation;
3) slurry of the partial flocculation obtained in step 2 is left standstill 12 ~ 48 hours, make slurry full and uniformization and deaeration;
4) diatomite, plant fiber powder, dispersant, antiseptic and deionized water join in ball grinder by a/, the slurry that ball milling uniformly distributes; The weight ratio of the diatomite used, plant fiber powder, dispersant, antiseptic and deionized water is 1000:30 ~ 1500:1 ~ 20:0 ~ 50:1000-2000;
B/ by flocculant and and stabilizing agent join in the slurry obtained in step a, continue ball milling make flocculant and stabilizing agent in the slurry dispersed, obtain the slurry of stable partial flocculation;
The slurry slaking of partial flocculation that c/ will obtain in step b, then in mould, drain casting is shaping, obtains ceramic element green compact after the demoulding;
5) adopt the method for dipping at the inside and outside surface coating of composite ceramics base substrate; Described dipping comprises outer surface dipping and inner surface dipping, outer surface dipping is that composite ceramic filter core base substrate is immersed the slurry after slaking, treat that billet surface absorption last layer thickness is the coating base substrate of 0.5 ~ 3mm, from coating paste, take out composite ceramic filter core base substrate; Inner surface dipping is poured into by coating paste in composite ceramic filter core base substrate cavity, is pour out the slurry do not adsorbed in cavity after 0.5 ~ 3mm until the coating layer thickness adsorbed at cavity inner wall, obtains coating on inner surface filter core;
6) coating green compact step 5 prepared are placed 5 ~ 48 hours at 60 ~ 100 DEG C,
7) dried green compact are kept sintering for 1 ~ 5 hour the temperature of 650 DEG C ~ 950 DEG C under inert gas shielding, and with stove cool to room temperature, obtain containing cated composite ceramic filter core.
Utilize above-mentioned technology path can obtain the coating composite ceramic filter core of difformity, different-thickness.
In the preparation method of aforementioned coatings composite ceramic filter core, the diatomite material in step 1 is preferably the commercially available super-cell through high-temperature calcination, and particle mean size is 30 μm.
Dispersant is preferably one in sodium carbonate or waterglass or its combination, and above-mentioned material after 3 ~ 10 hours, can be obtained finely dispersed ceramic size with the rotating speed ball milling of 60rpm ~ 150rpm at ball grinder.
In the preparation method of aforementioned coatings composite ceramic filter core, the flocculant in step 2 is preferably polyacrylamide, gum arabic, the one in sodium carboxymethylcellulose or kaolin that mean molecule quantity is 3,000,000; Stabilizing agent is preferably calcium-base bentonite or sodium bentonite.
In the preparation method of aforementioned coatings composite ceramic filter core, the slaking in step 4 refers to and the slurry of the partial flocculation obtained in step b is left standstill 12 ~ 48 hours, makes slurry full and uniformization and deaeration.
In step 4, can also substitute dip coating method by the method for spraying, described spraying utilizes spray gun by coating paste even application on the surface of composite ceramic filter core base substrate, and the thickness of spraying is 0.5-3mm.
In the preparation method of aforementioned coatings composite ceramic filter core, step 6 is preferably, and is placed 10 ~ 40 hours by the green compact of preparation in step 4 at 70 ~ 90 DEG C, the moisture in removing base substrate.
Inert gas of the present invention can be the one in argon gas, helium, radon gas or nitrogen, is preferably nitrogen.
Major advantage of the present invention is:
(1) use the food-grade diatomaceous filter aid through high-temperature fusion calcining to replace diatom original soil as filter core raw material, significantly improve the purity of raw material, ensure that the water after filtration not by the pollution of the harmful substance that may exist in diatomite material;
(2) mode of first dispersion, rear flocculation is adopted to prepare the slurry of injection forming: first to make raw material dispersed by suitable dispersant, then utilize suitable flocculant, stabilizing agent makes slurry fractions flocculate, thus improve the porosity of base substrate and the uniformity of size distribution, improve the stability (not occurring solid-liquid layering in 10 hours) of slurry, be conducive to the stability ensureing product quality.
(3) this preparation method does not use dystectic raw material, and base substrate Raw and hole interspersed high are evenly, reduce sintering temperature, make it lower than 950 DEG C, thus the natural micropore in diatomite can not be made to cave in because of high temperature sintering.
(4) the coating composite ceramic filter core Dustless-surface that this preparation method obtains comes off; And filter core have interior, in, outer three layers of different pore size filter, enhance filtering function, ensure safe drinking water,
(5) three-decker significantly improves the intensity of ceramic element.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, but do not form any limitation of the invention.
First preparation contains the composite ceramic filter core green compact of diatomite and charcoal
1,4000g alumina balls (by weight φ 30mm: φ 20mm: φ 15mm=1:2:1) are encased in the polyurethane ball grinder of 10 liters, then add 1L deionized water successively, food-grade corn starch, 5g waterglass (modulus is 3), 13 grams of natrium carbonicum calcinatums and 3g nano silver antimicrobials that super-cell that 1000g particle mean size is 30 μm, 30g particle mean size are 15 μm.After being sealed by ball grinder, carry out ball milling 8 hours with the speed of 80rpm, obtain the ceramic size of dispersion.
2, open ball grinder, add 5g sanlose and 30g calcium-base bentonite, then continue ball milling 3 hours with the speed of 80rpm, obtain the stable ceramic size of partial flocculation.
3, the ceramic size of partial flocculation is left standstill slaking in 12 hours, then pour in gypsum mold, leave standstill 15 minutes, then remaining slurry is poured out in plaster mold upset; Keep mould reversing, leave standstill 180 minutes, obtain diameter 50mm after the demoulding, wall thickness 6.5mm, length 250mm, one end is closed, the ceramic element green compact of other end opening.
In this coating composite ceramic filter core, diatomite and charcoal weight account for 94% of filter core gross weight.
Embodiment 1
1,4000g alumina balls (by weight φ 30mm: φ 20mm: φ 15mm=1:2:1) are encased in the polyurethane ball grinder of 10 liters, then add 1L deionized water successively, 1000g particle mean size is super-cell, 5g waterglass (modulus is 3), 13 grams of natrium carbonicum calcinatums of 30 μm.After being sealed by ball grinder, carry out ball milling 10 hours with the speed of 80rpm, obtain the ceramic size of dispersion.
2, open ball grinder, add 5g sanlose and 30g calcium-base bentonite, then continue ball milling 3 hours with the speed of 80rpm, obtain the stable ceramic size of partial flocculation.
3, the ceramic size of partial flocculation is left standstill slaking in 12 hours,
4, the slurry after slaking is imported composite ceramic filter core inner, leave standstill 1min, pour out additional size, 80 DEG C of oven for drying are put into 4 hours after leaving standstill 1min, ceramic body after oven dry is inserted in ceramic size and floods outer 1min, take out, after face coat moisture drying, put into 80 DEG C of oven for drying 6 hours.Then sinter under nitrogen protection.In sintering process, with the programming rate temperature of 2 DEG C/min to 650 DEG C, and 650 DEG C of insulations 5 hours, then cool to room temperature with the furnace, obtain coating composite ceramic filter core.
Find after obtained coating composite ceramic filter core being detected with porosimeter, the porosity 63% of filter core; Again obtained coating composite ceramic filter core wall is cut into the rectangular of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength 12MPa; In the present invention, one end is utilized to close, the filter core of one end open carries out the filter effect detection of gravity filtration in addition, unfiltered water is joined in coating composite ceramic filter core, then the water after the filtration infiltrated in filter core is carried out to the analysis detection of Escherichia coli clearance, chlorion clearance, lead ion clearance, naked eyes visible, turbidity and ceramic element open-cell porosity, Escherichia coli clearance >99.99%; In water, residual chlorine removes chlorine >99%; Plumbous clearance >99%; Without naked eyes visible; Turbidity < 0.1NTU.
Embodiment 2
1,4000g alumina balls (by weight φ 30mm: φ 20mm: φ 15mm=1:2:1) are encased in the polyurethane ball grinder of 10 liters, then add 1.25L deionized water successively, 1000g particle mean size is super-cell, 5g waterglass (modulus is 3), 8 grams of natrium carbonicum calcinatums of 30 μm.After being sealed by ball grinder, carry out ball milling 8 hours with the speed of 80rpm, obtain the ceramic size of dispersion.
2, open ball grinder, add kaolin and the 30g calcium-base bentonite of 20g, then continue ball milling 3 hours with the speed of 80rpm, obtain the stable ceramic size of partial flocculation.
3, the ceramic size of partial flocculation is left standstill slaking in 12 hours,
4, the slurry after slaking is imported composite ceramic filter core inner, leave standstill 1min, pour out additional size, 80 DEG C of oven for drying are put into 4 hours after leaving standstill 1min, ceramic body after oven dry is inserted in ceramic size and floods outer 1min, take out, after face coat moisture drying, put into 80 DEG C of oven for drying 6 hours.Then sinter under nitrogen protection.In sintering process, with the programming rate temperature of 2 DEG C/min to 800 DEG C, and 800 DEG C of insulations 3 hours, then cool to room temperature with the furnace, obtain coating composite ceramic filter core.
Find after obtained coating composite ceramic filter core being detected with porosimeter, the porosity 66% of filter core; Again obtained coating composite ceramic filter core wall is cut into the rectangular of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength 16.7MPa; In the present invention, one end is utilized to close, the filter core of one end open carries out the filter effect detection of gravity filtration in addition, unfiltered water is joined in coating composite ceramic filter core, then the water after the filtration infiltrated in filter core is carried out to the analysis detection of Escherichia coli clearance, chlorion clearance, lead ion clearance, naked eyes visible, turbidity and ceramic element open-cell porosity, Escherichia coli clearance >99.99%; In water, residual chlorine removes chlorine >99%; Plumbous clearance >99%; Without naked eyes visible; Turbidity < 0.1NTU.
Embodiment 3
1,4000g alumina balls (by weight φ 30mm: φ 20mm: φ 15mm=1:2:1) are encased in the polyurethane ball grinder of 10 liters, then add 1.5L deionized water successively, 1000g particle mean size is super-cell, 10g waterglass (modulus is 3), 5 grams of natrium carbonicum calcinatums of 30 μm.After being sealed by ball grinder, carry out ball milling 6 hours with the speed of 80rpm, obtain the ceramic size of dispersion.
2, open ball grinder, add 5g Arabic gum and 60g calcium-base bentonite, then continue ball milling 2 hours with the speed of 80rpm, obtain the stable ceramic size of partial flocculation.
3, the ceramic size of partial flocculation is left standstill slaking in 20 hours,
4, the slurry after slaking is imported composite ceramic filter core inner, leave standstill 1min, pour out additional size, 100 DEG C of oven for drying are put into 4 hours after leaving standstill 1min, ceramic body after oven dry is inserted in ceramic size and floods outer 1min, take out, after face coat moisture drying, put into 100 DEG C of oven for drying 6 hours.Then sinter under nitrogen protection.In sintering process, with the programming rate temperature of 2 DEG C/min to 900 DEG C, and 900 DEG C of insulations 3 hours, then cool to room temperature with the furnace, obtain coating composite ceramic filter core.
Find after obtained coating composite ceramic filter core being detected with porosimeter, the porosity 68% of filter core; Again obtained coating composite ceramic filter core wall is cut into the rectangular of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength 15.6MPa; In the present invention, one end is utilized to close, the filter core of one end open carries out the filter effect detection of gravity filtration in addition, unfiltered water is joined in coating composite ceramic filter core, then the water after the filtration infiltrated in filter core is carried out to the analysis detection of Escherichia coli clearance, chlorion clearance, lead ion clearance, naked eyes visible, turbidity and ceramic element open-cell porosity, Escherichia coli clearance >99.99%; In water, residual chlorine removes chlorine >99%; Plumbous clearance >99%; Without naked eyes visible; Turbidity < 0.1NTU.
Embodiment 4
1,4000g alumina balls (by weight φ 30mm: φ 20mm: φ 15mm=1:2:1) are encased in the polyurethane ball grinder of 10 liters, then add 1.6L deionized water successively, 1000g particle mean size is super-cell, 8g waterglass (modulus is 3), 7 grams of natrium carbonicum calcinatums of 30 μm.After being sealed by ball grinder, carry out ball milling 1 hour with the speed of 80rpm, obtain the ceramic size of dispersion.
2, open ball grinder, add 15g CMC and 60g calcium-base bentonite, then continue ball milling 2 hours with the speed of 80rpm, obtain the stable ceramic size of partial flocculation.
3, the ceramic size of partial flocculation is left standstill slaking in 20 hours,
4, the slurry after slaking is imported composite ceramic filter core inner, leave standstill 1min, pour out additional size, 90 DEG C of oven for drying are put into 4 hours after leaving standstill 1min, ceramic body after oven dry is inserted in ceramic size and floods outer 1min, take out, after face coat moisture drying, put into 90 DEG C of oven for drying 6 hours.Then sinter under nitrogen protection.In sintering process, with the programming rate temperature of 5 DEG C/min to 950 DEG C, and 950 DEG C of insulations 3 hours, then cool to room temperature with the furnace, obtain coating composite ceramic filter core.
Find after obtained coating composite ceramic filter core being detected with porosimeter, the porosity 60% of filter core; Again obtained coating composite ceramic filter core wall is cut into the rectangular of 6mm × 6mm × 50mm, detects its three-point bending resistance intensity, its three-point bending strength 23MPa; In the present invention, one end is utilized to close, the filter core of one end open carries out the filter effect detection of gravity filtration in addition, unfiltered water is added coating in composite ceramic filter core, then the water after the filtration infiltrated in filter core is carried out to the analysis detection of Escherichia coli clearance, chlorion clearance, lead ion clearance, naked eyes visible, turbidity and ceramic element open-cell porosity, Escherichia coli clearance >99.99%; In water, residual chlorine removes chlorine >99%; Plumbous clearance >99%; Without naked eyes visible; Turbidity < 0.1NTU.
Claims (8)
1. the preparation method of coating composite ceramic filter core, comprises the following steps:
1) diatomite material adopts the super-cell through high-temperature calcination, particle mean size is 20-40 μm, diatomite, dispersant and deionized water are joined in ball grinder, the slurry that ball milling uniformly distributes, the weight ratio of the diatomite used, dispersant and deionized water is 1000:1 ~ 20:1000 ~ 2000;
2) flocculant and stabilizing agent are joined in the slurry obtained in step 1, flocculant addition is the diatomite of step 1 and 0.2 ~ 3% of dispersant use gross weight; Stabilizing agent addition is the diatomite of step 1 and 1 ~ 10% of dispersant use gross weight; Continue ball milling make flocculant and stabilizing agent in the slurry dispersed, the rotating speed of ball milling is 60rpm ~ 150rpm, continue Ball-milling Time be 0.5 ~ 3 hour, flocculant and stabilizing agent are mixed in the slurry, obtain the slurry of stable partial flocculation;
3) slurry of the partial flocculation obtained in step 2 is left standstill 12 ~ 48 hours, make slurry full and uniformization and deaeration, obtain coating paste;
4) diatomite, plant fiber powder, dispersant and deionized water join in ball grinder by a/, the slurry that ball milling uniformly distributes; Antiseptic is not comprised in slurry; Or comprise antiseptic; The weight ratio of the diatomite used, plant fiber powder, dispersant, antiseptic and deionized water is 1000:30 ~ 1500:1 ~ 20:0 ~ 50:1000-2000;
Flocculant and stabilizing agent join in the slurry obtained in step a by b/, continue ball milling make flocculant and stabilizing agent in the slurry dispersed, obtain the slurry of stable partial flocculation;
The slurry slaking of partial flocculation that c/ will obtain in step b, then in mould, drain casting is shaping, obtains ceramic element green compact after the demoulding;
5) method of dipping is adopted in step 4) the obtained inside and outside surface coating of composite ceramic filter core green compact; Described dipping comprises outer surface dipping and inner surface dipping, outer surface dipping is that composite ceramic filter core base substrate is immersed the coating paste after slaking, treat that billet surface absorption last layer thickness is the coating base substrate of 0.5 ~ 3mm, from coating paste, take out composite ceramic filter core base substrate; Inner surface dipping is poured into by coating paste in composite ceramic filter core base substrate cavity, is pour out the slurry do not adsorbed in cavity after 0.5 ~ 3mm until the coating layer thickness adsorbed at cavity inner wall, obtains coating on inner surface filter core;
6) coating green compact step 5 prepared are placed 5 ~ 48 hours at 60 ~ 100 DEG C;
7) dried green compact are kept sintering for 1 ~ 5 hour the temperature of 650 DEG C ~ 950 DEG C under inert gas shielding, and with stove cool to room temperature, obtain containing cated composite ceramic filter core.
2. the preparation method of coating composite ceramic filter core according to claim 1, is characterized in that: the diatomite material in step 1 is the super-cell through high-temperature calcination, and particle mean size is 30 μm.
3. the preparation method of coating composite ceramic filter core according to claim 1, is characterized in that: dispersant is one in sodium carbonate or waterglass or its combination.
4. the preparation method of coating composite ceramic filter core according to claim 1, is characterized in that: the rotational speed of ball-mill in step 1 is 60rpm ~ 150rpm, and Ball-milling Time 3 ~ 10 hours, obtains equally distributed slurry.
5. the preparation method of the coating composite ceramic filter core according to claim 2,3 or 4, is characterized in that: flocculant to be mean molecule quantity be 3,000,000 polyacrylamide, gum arabic, one in sodium carboxymethylcellulose or kaolin; Stabilizing agent is calcium-base bentonite or sodium bentonite.
6. the preparation method of coating composite ceramic filter core according to claim 1, it is characterized in that: in step 5, substitute dip coating by the method for spraying, described spraying utilizes spray gun by coating paste even application on the surfaces externally and internally of composite ceramic filter core base substrate, and the thickness of spraying is 0.5 ~ 3mm.
7. the preparation method of coating composite ceramic filter core according to claim 1, is characterized in that: placed 10 ~ 40 hours at 70 ~ 90 DEG C by the coating green compact of preparation in step 6.
8. the preparation method of coating composite ceramic filter core according to claim 1, is characterized in that: described inert gas is the one in argon gas, helium, radon gas or nitrogen.
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| CN106474822A (en) * | 2016-10-28 | 2017-03-08 | 三达膜科技（厦门）有限公司 | A kind of preparation method of the composite ceramic filter core of loaded optic catalyst coating |
| CN108046833B (en) * | 2017-12-21 | 2020-06-30 | 深圳市卓力能电子有限公司 | Preparation process of ceramic heating body with porous heating film structure |
| CN112135701B (en) * | 2018-07-09 | 2022-07-19 | 株式会社普罗吉鲁 | Ceramic filter and method for manufacturing the same |
| CN108947508B (en) * | 2018-08-21 | 2021-09-14 | 东莞市倍益清环保科技有限公司 | Ceramic filter element, preparation method and application thereof |
| CN109392804A (en) * | 2018-11-04 | 2019-03-01 | 咸阳陶瓷研究设计院有限公司 | A method of fishpond and aquarium filtering material are prepared using diatomite |
| CN109630712B (en) * | 2018-12-24 | 2020-05-08 | 厦门金亿通管业有限公司 | Ceramic water tap and manufacturing method thereof |
| CN113274892A (en) * | 2021-03-16 | 2021-08-20 | 黄亮 | Formula and production process of porous water purification ceramic filter element |
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