CN111659187A - Preparation method of piezoelectric foamed ceramic filter for sewage treatment - Google Patents
Preparation method of piezoelectric foamed ceramic filter for sewage treatment Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/20—Vanadium, niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/495—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/0615—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances the burned-out substance being a monolitic element having approximately the same dimensions as the final article, e.g. a porous polyurethane sheet or a prepreg obtained by bonding together resin particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
- C04B2235/3203—Lithium oxide or oxide-forming salts thereof
Abstract
The invention discloses a preparation method of a piezoelectric foamed ceramic filter for sewage treatment, which is characterized in that polyurethane sponge is used as a template, ceramic slurry is adhered to the polyurethane sponge, and then a formed filter disc is sintered, wherein the polyurethane sponge volatilizes during sintering, and porous ceramic is formed after sintering. On one hand, solid pollutants are prevented from depositing on the surface of the porous foamed ceramic filter through vibration to block the pores of the porous foamed ceramic filter, so that the filtering efficiency of the porous foamed ceramic filter is enhanced; on the other hand, piezoelectric ceramics are used as the main material of the porous foamed ceramics, and in-situ piezoelectric chemical reaction is generated by vibration to degrade organic pollutants. The invention integrates and improves the filtration and degradation efficiency, and has wide application prospect in the field of wastewater treatment. And the preparation process is simple, can be repeatedly utilized and is suitable for industrial production.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a preparation method of a piezoelectric foamed ceramic filter for sewage treatment.
Background
In industrial wastewater, a large amount of colored organic compounds exist, and the organic compounds have high content in water, complex components, deep chromaticity and large water quality change, which can cause serious water body pollution and health problems. In addition, with the development of the chemical industry, various novel dyes with oxidation resistance, photolysis resistance, acid-base corrosion resistance and microbial degradation resistance are produced in succession, so that the treatment difficulty and the treatment cost of the printing and dyeing wastewater are greatly improved.
At present, methods for treating colored organic matters in industrial wastewater at home and abroad are mainly divided into three types, namely physical, chemical and biological treatment methods. Some of the physical methods commonly used for removing colored organic compounds, such as activated carbon adsorption, ultrafiltration, reverse osmosis, chemical flocculation, ion exchange, etc., do not degrade organic molecules, but they are a process for enriching pollutants, and thus generate secondary pollution, and as a result, large amount of money is still needed for further regeneration of the adsorbent and subsequent treatment of solid waste. The catalytic material used in the chemical method can only be used once and cannot be recycled, which results in higher treatment cost. Biological methods are less suitable because of the higher stability of modern dyes and the fact that most industrial dyes contain compounds that are biologically toxic, resulting in less than optimal treatment and rate of biodegradation.
The foamed ceramic is one kind of porous material and has three-dimensional netted structure and high porosity. Due to the special structure of the foamed ceramic, the foamed ceramic has the advantages of small density, high porosity, high specific strength, good thermal vibration resistance, high temperature resistance and the like. Therefore, the foamed ceramic is widely applied to gas and liquid filtration, purification and separation, chemical catalysis, sound absorption and shock absorption, high-grade heat insulation materials, biological implantation materials, special strong materials, sensors and other aspects.
Piezoelectric materials can convert mechanical energy into electrical energy, degrading harmful contaminants through in situ piezoelectric chemical reaction processes. Some typical piezoelectric materials. Such as BaTiO3、Pb(Zr0.52Ti0.48)O3And ZnO has been shown to decompose H under the driving force of mechanical vibration2O or an effective piezoelectric catalyst for degrading organic contaminants (Enhancement effect in the piezoelectric degradation of organic polutants by piezoelectric-Fenton process. journal of Chemical Technology&Biotechnology,2017 92(1):152-156)。
The invention will be 0.94K0.5Na0.5NbO3-0.06LiNbO3The piezoelectric material is made into piezoelectric foamed ceramic, and the KNLN piezoelectric material component is positioned at a phase boundary, so that the piezoelectric activity is highest. On one hand, the filtering efficiency of the foamed ceramic is enhanced by preventing the filtered solid of the foamed ceramic from depositing on the surface of the ceramic to block the pores of the foamed ceramic through vibration. On the other hand, piezoelectric ceramics are used as the main material of the foamed ceramics, and harmful pollutants are degraded by in-situ piezoelectric chemical reaction generated by vibration.
Disclosure of Invention
The invention aims to solve the problems that: the piezoelectric ceramic foam filter for sewage treatment is prepared by combining the piezoelectric property of KNLN-based ceramic and the preparation method of the ceramic foam, and the KNLN-based ceramic foam is integrated with a piezoelectric vibration system, so that the piezoelectric ceramic foam filter with high filtering efficiency and pollutant degradation function is obtained.
The technical scheme provided by the invention for solving the problems is as follows: a preparation method of a piezoelectric ceramic foam filter for sewage treatment comprises the following steps,
1) and weighing Na2CO3、K2CO3、Nb2O5、Li2CO3The molar ratio is 1.01: 1.01: 2: (0.05-0.15) synthesizing KNLN;
2) adding a polyvinyl alcohol aqueous solution and a methylcellulose aqueous solution into the chemical in the step 1); mixing, adding polyacrylamide aqueous solution, and mixing;
3) soaking the flexible polyurethane foam into a sodium hydroxide solution, hydrolyzing, cleaning and airing;
4) immersing the treated polyurethane foam into the prepared slurry; then, extruding polyurethane foam to remove redundant slurry, and drying; repeating the coating and drying processes until a uniformly coated, non-clogging object is obtained;
5) pre-burning and sintering the prepared object;
6) polarizing the sintered ceramic;
7) the polarized piezoelectric foamed ceramics, the ceramic plate printed with silver wires and the piezoelectric vibrator are assembled, the power supply is switched on, and the filtration efficiency (0-95%) is measured.
Preferably, the mass ratio of the chemical to the mixed solution of the polyvinyl alcohol aqueous solution and the methylcellulose aqueous solution in the step 2) is 2: 1, the mass fraction of the polyvinyl alcohol aqueous solution is 10 wt%, the mass fraction of the methyl cellulose aqueous solution is 5 wt%, and the mass fraction of the polyacrylamide aqueous solution is 2 wt%.
Preferably, the mass fraction of the sodium hydroxide solution in the step 3) is 15 wt%, the hydrolysis temperature is 40-60 ℃, and the hydrolysis time is 2-6 h.
Preferably, in the step 5), the pre-sintering temperature is 600 ℃, the heating speed is 10 ℃/min, the heat preservation time is 1h, the sintering temperature is 1050 ℃, the heating speed is 10 ℃/min, and the heat preservation time is 0.5-2 h.
Preferably, the polarization time of the piezoelectric foam ceramic in the step 6) is 15min to 60min, and the polarization field intensity is 2kV to 3 kV.
Preferably, the ceramic foam is combined with a piezoelectric vibration system.
Compared with the prior art, the invention has the advantages that:
(1) according to the invention, the foamed ceramic and the piezoelectric vibrator are combined, solid impurities cannot be gathered on the surface of the foamed ceramic through vibration, the foamed ceramic is prevented from being blocked, and the reduction of the flux of the foamed ceramic is delayed, so that the filtering efficiency is increased.
(2) The piezoelectric material is made into the piezoelectric foamed ceramic, so that the function of degrading organic pollutants is realized, the force-electricity conversion is realized through the vibration of the piezoelectric vibrator, and the efficiency of piezoelectric catalysis is greatly enhanced.
In conclusion, the preparation process is simple, convenient, economic and reasonable, can be repeatedly used for many times, is suitable for large-scale industrial production, and has important significance for improving the filtering efficiency of the foamed ceramic and catalyzing and degrading organic pollutants.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of a ceramic foam filter incorporating a piezoelectric vibration system.
FIG. 2 is a schematic view of the ceramic foam filter with the upper housing half removed.
Fig. 3 is an XRD pattern of KNLN lead-free piezoelectric ceramic foam.
FIG. 4 is a graph showing the effect of catalytic degradation of the organic pollutant rhodamine B in example 2 (wherein (a) is before filtration, and (B) is after filtration).
Fig. 5 is a graph of the flux change for example 3 and example 4.
The attached drawings are marked as follows: 1. the device comprises a piezoelectric vibrator, 2 parts of a shell, 3 parts of an O-shaped ring, 4 parts of a ceramic sheet, 5 parts of foamed ceramic, 6 parts of sewage and 7 parts of filtered/degraded sewage.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
Example 1:
1) weighing Na2CO3、K2CO3、Nb2O5、Li2CO3The molar ratio is 1.01: 1.01: 2: 0.07 was used for synthesizing KNLN. Adding a medicine to the chemical medicine according to the mass ratio of 2: 1 of a 10% by weight aqueous polyvinyl alcohol solution and 5% by weight aqueous methylcellulose solution. Mixing the medicine and the solution thoroughly, adding 2 wt% polyacrylamide water solutionAnd mixing them fully.
2) And (3) soaking the flexible polyurethane foam into 15 wt% of sodium hydroxide solution, carrying out hydrolysis treatment at 60 ℃ for 6h to remove the inter-network membrane, and cleaning and airing.
3) The treated polyurethane foam was immersed in the prepared slurry. The polyurethane foam is then squeezed to remove excess slurry and placed in a drying oven for drying. The above coating and drying process was repeated until a uniformly coated, non-clogging object was obtained.
4) And putting the prepared object into a muffle furnace, heating to 600 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 1h, continuing to heat to 1000 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 2h, and cooling to room temperature along with the furnace for experiments.
5) Only foamed ceramic is used in the degradation process, the concentration of the rhodamine B solution is 5mg/L, and the measured filtration efficiency is 20%.
Example 2:
1) weighing Na2CO3、K2CO3、Nb2O5、Li2CO3The molar ratio is 1.01: 1.01: 2: 0.07 was used for synthesizing KNLN. Adding a medicine to the chemical medicine according to the mass ratio of 2: 1 of a 10% by weight aqueous polyvinyl alcohol solution and 5% by weight aqueous methylcellulose solution. The drug and solution were mixed thoroughly, and a 2 wt% aqueous solution of polyacrylamide was added and mixed thoroughly.
2) And (3) soaking the flexible polyurethane foam into 15 wt% of sodium hydroxide solution, carrying out hydrolysis treatment at 60 ℃ for 6h to remove the inter-network membrane, and cleaning and airing.
3) The treated polyurethane foam was immersed in the prepared slurry. The polyurethane foam is then squeezed to remove excess slurry and placed in a drying oven for drying. The above coating and drying process was repeated until a uniformly coated, non-clogging object was obtained.
4) And putting the prepared object into a muffle furnace, heating to 600 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 1h, continuing heating to 1050 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 2h, and cooling to room temperature along with the furnace.
5) The prepared foamed ceramic is polarized for 1h under an electric field of 2kV, and then is combined with a piezoelectric vibration system.
6) And (3) switching on a piezoelectric vibration system to obtain a rhodamine B solution with the concentration of 5mg/L, and measuring the filtration efficiency of 90%.
Example 3:
1) weighing Na2CO3、K2CO3、Nb2O5、Li2CO3The molar ratio is 1.01: 1.01: 2: 0.07 was used for synthesizing KNLN. Adding a medicine to the chemical medicine according to the mass ratio of 2: 1 of a 10% by weight aqueous polyvinyl alcohol solution and 5% by weight aqueous methylcellulose solution. The drug and solution were mixed thoroughly, and a 2 wt% aqueous solution of polyacrylamide was added and mixed thoroughly.
2) And (3) soaking the flexible polyurethane foam into 15 wt% of sodium hydroxide solution, carrying out hydrolysis treatment at 60 ℃ for 6h to remove the inter-network membrane, and cleaning and airing.
3) The treated polyurethane foam was immersed in the prepared slurry. The polyurethane foam is then squeezed to remove excess slurry and placed in a drying oven for drying. The above coating and drying process was repeated until a uniformly coated, non-clogging object was obtained.
4) And putting the prepared object into a muffle furnace, heating to 600 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 1h, continuing heating to 1050 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 2h, and cooling to room temperature along with the furnace.
5) During the filtration process, only the foamed ceramic is adopted, the concentration of the humic acid solution is 4mg/L, the flux reduction is measured to be 18 percent of the initial flux reduction within 5min from the beginning of the experiment, 10 percent of the flux reduction within 10min, and then the flux is basically kept unchanged.
Example 4:
1) weighing Na2CO3、K2CO3、Nb2O5、Li2CO3The molar ratio is 1.01: 1.01: 2: 0.07 was used for synthesizing KNLN. Adding a medicine to the chemical medicine according to the mass ratio of 2: 1 of a 10% by weight aqueous polyvinyl alcohol solution and 5% by weight aqueous methylcellulose solution. The drug and solution were mixed thoroughly, and a 2 wt% aqueous solution of polyacrylamide was added and mixed thoroughly.
2) And (3) soaking the flexible polyurethane foam into 15 wt% of sodium hydroxide solution, carrying out hydrolysis treatment at 60 ℃ for 6h to remove the inter-network membrane, and cleaning and airing.
3) The treated polyurethane foam was immersed in the prepared slurry. The polyurethane foam is then squeezed to remove excess slurry and placed in a drying oven for drying. The above coating and drying process was repeated until a uniformly coated, non-clogging object was obtained.
4) And putting the prepared object into a muffle furnace, heating to 600 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 1h, continuing heating to 1050 ℃ at a heating speed of 10 ℃/min, keeping the temperature for 2h, and cooling to room temperature along with the furnace.
5) The prepared ceramic foam is combined with a piezoelectric vibration system.
6) The piezoelectric vibration system is powered on, the concentration of the humic acid solution is 4mg/L, the flux reduction amount is measured to be 38 percent of the flux reduction amount which is reduced to the initial value within 5min of the experiment, the flux reduction amount is measured to be 25 percent within 10min, the flux reduction amount is gradually reduced to 12 percent within 60min, and then the flux is basically kept unchanged.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (6)
1. A preparation method of a piezoelectric ceramic foam filter for sewage treatment is characterized by comprising the following steps: the method comprises the following steps of,
1) and weighing Na2CO3、K2CO3、Nb2O5、Li2CO3The molar ratio is 1.01: 1.01: 2: (0.05-0.15) synthesizing KNLN;
2) adding a polyvinyl alcohol aqueous solution and a methylcellulose aqueous solution into the chemical in the step 1); mixing, adding polyacrylamide aqueous solution, and mixing;
3) soaking the flexible polyurethane foam into a sodium hydroxide solution, hydrolyzing, cleaning and airing;
4) immersing the treated polyurethane foam into the prepared slurry; then, extruding polyurethane foam to remove redundant slurry, and drying; repeating the coating and drying processes until a uniformly coated, non-clogging object is obtained;
5) pre-burning and sintering the prepared object;
6) polarizing the sintered ceramic;
7) the polarized piezoelectric foamed ceramics, the ceramic plate printed with silver wires and the piezoelectric vibrator are assembled, the power supply is switched on, and the filtration efficiency (0-95%) is measured.
2. The method for preparing a piezoelectric ceramic foam filter for sewage treatment according to claim 1, wherein: the mass ratio of the chemicals to the mixed solution of the polyvinyl alcohol aqueous solution and the methylcellulose aqueous solution in the step 2) is 2: 1, the mass fraction of the polyvinyl alcohol aqueous solution is 10 wt%, the mass fraction of the methyl cellulose aqueous solution is 5 wt%, and the mass fraction of the polyacrylamide aqueous solution is 2 wt%.
3. The method for preparing a piezoelectric ceramic foam filter for sewage treatment according to claim 1, wherein: in the step 3), the mass fraction of the sodium hydroxide solution is 15 wt%, the hydrolysis temperature is 40-60 ℃, and the hydrolysis time is 2-6 h.
4. The method for preparing a piezoelectric ceramic foam filter for sewage treatment according to claim 1, wherein: in the step 5), the pre-sintering temperature is 600 ℃, the heating speed is 10 ℃/min, the heat preservation time is 1h, the sintering temperature is 1050 ℃, the heating speed is 10 ℃/min, and the heat preservation time is 0.5-2 h.
5. The method for preparing a piezoelectric ceramic foam filter for sewage treatment according to claim 1, wherein: the polarization time of the piezoelectric foam ceramic in the step 6) is 15-60 min, and the polarization field intensity is 2-3 kV.
6. The method for preparing a piezoelectric ceramic foam filter for sewage treatment according to claim 1, wherein: the ceramic foam is combined with a piezoelectric vibration system.
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| GB1373280A (en) * | 1971-04-19 | 1974-11-06 | Prod Pour Catalyse Soc Franc D | Process and catalyst for decomposing nitrogen oxides |
| US4329162A (en) * | 1980-07-03 | 1982-05-11 | Corning Glass Works | Diesel particulate trap |
| EP0073634A1 (en) * | 1981-08-24 | 1983-03-09 | Corning Glass Works | Selectively plugged sinterable honeycomb structures |
| US5039644A (en) * | 1989-01-10 | 1991-08-13 | Corning Incorporated | Phosphate-containing ceramic structures for catalyst support and fluid filtering |
| CN101200368A (en) * | 2006-11-24 | 2008-06-18 | 富士钛工业株式会社 | Complex oxide powder, method for preparing the complex oxide powder, ceramic composition and ceramic electronic component comprising the complex oxide powder |
| GB2469877A (en) * | 2009-05-01 | 2010-11-03 | Nat Petrochemical Company | Method for preparing ceramic catalysts |
| CN103831077A (en) * | 2012-11-23 | 2014-06-04 | 黄炳照 | Ceramic material, adsorption method of carbon dioxide and conversion method of carbon dioxide |
| CN104498944A (en) * | 2015-01-13 | 2015-04-08 | 南昌航空大学 | Method for laser cladding preparation of surface ceramic coating using nano core-shell particle powder |
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2020
- 2020-06-01 CN CN202010483652.0A patent/CN111659187B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1373280A (en) * | 1971-04-19 | 1974-11-06 | Prod Pour Catalyse Soc Franc D | Process and catalyst for decomposing nitrogen oxides |
| US4329162A (en) * | 1980-07-03 | 1982-05-11 | Corning Glass Works | Diesel particulate trap |
| EP0073634A1 (en) * | 1981-08-24 | 1983-03-09 | Corning Glass Works | Selectively plugged sinterable honeycomb structures |
| US5039644A (en) * | 1989-01-10 | 1991-08-13 | Corning Incorporated | Phosphate-containing ceramic structures for catalyst support and fluid filtering |
| CN101200368A (en) * | 2006-11-24 | 2008-06-18 | 富士钛工业株式会社 | Complex oxide powder, method for preparing the complex oxide powder, ceramic composition and ceramic electronic component comprising the complex oxide powder |
| GB2469877A (en) * | 2009-05-01 | 2010-11-03 | Nat Petrochemical Company | Method for preparing ceramic catalysts |
| CN103831077A (en) * | 2012-11-23 | 2014-06-04 | 黄炳照 | Ceramic material, adsorption method of carbon dioxide and conversion method of carbon dioxide |
| CN104498944A (en) * | 2015-01-13 | 2015-04-08 | 南昌航空大学 | Method for laser cladding preparation of surface ceramic coating using nano core-shell particle powder |
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