CN111875369A - Preparation method of corrosion-resistant magnetic ferrite core - Google Patents
Preparation method of corrosion-resistant magnetic ferrite core Download PDFInfo
- Publication number
- CN111875369A CN111875369A CN202010550217.5A CN202010550217A CN111875369A CN 111875369 A CN111875369 A CN 111875369A CN 202010550217 A CN202010550217 A CN 202010550217A CN 111875369 A CN111875369 A CN 111875369A
- Authority
- CN
- China
- Prior art keywords
- modified
- pyrophyllite
- parts
- drying
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
-
- 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
- C04B35/26—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 ferrites
- C04B35/2683—Other ferrites containing alkaline earth metals or lead
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5001—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with carbon or carbonisable materials
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
-
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3481—Alkaline earth metal alumino-silicates other than clay, e.g. cordierite, beryl, micas such as margarite, plagioclase feldspars such as anorthite, zeolites such as chabazite
-
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
Abstract
The invention discloses a preparation method of a corrosion-resistant magnetic ferrite core, which comprises the following steps: the method comprises the following steps: selecting magnetic core materials on the market, carrying out melting treatment on the magnetic core materials, wherein the melting temperature is 1000-1500 ℃, the melting time is 15-25min, then adding the modified pyrophyllite, and then stirring at the rotating speed of 100-500r/min for 15-25 min. The magnetic ferrite magnetic core is prepared by melting the magnetic core material in the market at 1000 ℃ for 15min, adding the modified pyrophyllite, wherein the modified pyrophyllite can improve the temperature resistance of the material after being modified, and the added modified phillipsite and modified ore can be further mixed with raw material products, so that the corrosion resistance of the product is improved.
Description
Technical Field
The invention relates to the technical field of magnetic ferrite cores, in particular to a preparation method of a corrosion-resistant magnetic ferrite core.
Background
The ferrite core is made of dense and homogeneous non-metallic magnetic material with ceramic structure and low coercive force, and is also called soft magnetic ferrite. It consists of iron oxide (Fe2O3) and one or more oxide or carbonate compounds of other metals (e.g. manganese, zinc, nickel, magnesium). Compared with other types of magnetic materials, the ferrite has the advantages of high magnetic conductivity, high resistance in a wide frequency range, low eddy current loss and the like. These material properties make ferrites ideal for the fabrication of high frequency transformers, wide band transformers, tunable inductors and other high frequency circuits from 10kHz to 50 MHz.
The existing magnetic ferrite core has poor corrosion resistance, and the performance of the magnetic ferrite core is deteriorated under the acid-base environment for a long time, so that further improvement treatment is needed.
Disclosure of Invention
The present invention is directed to a method for manufacturing a corrosion-resistant magnetic ferrite core to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a preparation method of a corrosion-resistant magnetic ferrite core, which comprises the following steps:
the method comprises the following steps: selecting magnetic core materials on the market, carrying out melting treatment on the magnetic core materials, wherein the melting temperature is 1000-1500 ℃, the melting time is 15-25min, then adding the modified pyrophyllite, and then stirring at the rotating speed of 100-500r/min for 15-25 min;
step two, modifying ores: swelling rare earth minerals with xylene at 70 ℃ for 20min in a nitrogen environment, then washing with acetone for 3 times, then putting into an oven for drying, adding ethanol and a silane coupling agent KH-570, mixing at a stirring speed of 155r/min, and then drying to obtain modified ores;
step three, modifying phillipsite: putting phillipsite into a vacuum drying oven, drying to constant weight, soaking and refluxing with 3% by mass of silane coupling agent KH550 and gamma-aminopropyl methyl dimethoxy silane respectively at the heating temperature of 95-105 ℃ for 2h, and taking out and drying;
step four, adding the modified phillipsite and the modified ore into the step one for continuous melting treatment, and then cooling to room temperature;
step five, sintering treatment: and (3) feeding the cooled magnetic core into a sintering furnace for sintering treatment, naturally cooling to room temperature, and finally performing porous graphene dispersion treatment.
Preferably, the modified pyrophyllite is formed by spreading pyrophyllite on a glass plate with the thickness of 1-2mm, and then adopting HL1500 type helium-free crossflow CO2And the laser processing machine carries out surface modification on the pyrophyllite.
Preferably, the laser power is 45-55W.
Preferably, the laser power is 50W.
Preferably, the sintering furnace is used for sintering at the temperature of 1000-1500 ℃ for 10-20 min.
Preferably, the sintering furnace sintering is firstly carried out at the temperature of 1250 ℃ for 15 min.
Preferably, the preparation method of the porous graphene comprises the steps of adding the porous graphene into the modification solution to react for 15-25min, washing with deionized water for 3-4 times, adding 50-60% by mass of dilute sulfuric acid to treat for 20-30min, and adjusting the pH value with sodium hydroxide.
Preferably, the modifying solution comprises the following raw materials in parts by weight: 20-30 parts of hydroxyethyl cellulose ether, 15-25 parts of hydrochloric acid, 20-30 parts of deionized water and 15-25 parts of sodium pyrophosphate.
Compared with the prior art, the invention has the following beneficial effects:
the magnetic ferrite magnetic core adopts magnetic core materials in the market, the magnetic core materials are melted, the melting temperature is 1000 ℃, the melting time is 15min, then modified pyrophyllite is added, the temperature resistance of the materials can be improved after the modified pyrophyllite is modified, meanwhile, the added modified phillipsite and modified ore can be further mixed with raw material products, and therefore the corrosion resistance of the products is improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the preparation method of the corrosion-resistant magnetic ferrite core comprises the following steps:
the method comprises the following steps: selecting magnetic core materials on the market, carrying out melting treatment on the magnetic core materials, wherein the melting temperature is 1000 ℃, the melting time is 15min, then adding the modified pyrophyllite, and then stirring the mixture for 15min at the rotating speed of 100 r/min;
step two, modifying ores: swelling rare earth minerals with xylene at 70 ℃ for 20min in a nitrogen environment, then washing with acetone for 3 times, then putting into an oven for drying, adding ethanol and a silane coupling agent KH-570, mixing at a stirring speed of 155r/min, and then drying to obtain modified ores;
step three, modifying phillipsite: putting phillipsite into a vacuum drying oven, drying to constant weight, soaking and refluxing the phillipsite with a silane coupling agent KH550 and gamma-aminopropyl methyl dimethoxy silane of which the mass fractions are 3%, respectively, heating to 95 ℃, refluxing for 2 hours, and taking out and drying;
step four, adding the modified phillipsite and the modified ore into the step one for continuous melting treatment, and then cooling to room temperature;
step five, sintering treatment: and (3) sending the cooled magnetic core into a sintering furnace for sintering, naturally cooling to room temperature, and finally performing porous graphene dispersion treatment.
Preferably, the modified pyrophyllite is formed by spreading pyrophyllite on a glass plate with the thickness of 1mm, and then adopting HL1500 type helium-free crossflow CO2And the laser processing machine carries out surface modification on the pyrophyllite.
The laser power of this example was 45W.
The sintering furnace of this example first sinters at 1000 ℃ for 10 min.
The preparation method of the porous graphene comprises the steps of adding the porous graphene into a modification solution to react for 15min, washing with deionized water for 3 times, adding 50% dilute sulfuric acid by mass percent to treat for 20min, and adjusting the pH value with sodium hydroxide.
The modified liquid of the embodiment comprises the following raw materials in parts by weight: 20 parts of hydroxyethyl cellulose ether, 15 parts of hydrochloric acid, 20 parts of deionized water and 15 parts of sodium pyrophosphate.
Example 2:
the preparation method of the corrosion-resistant magnetic ferrite core comprises the following steps:
the method comprises the following steps: selecting magnetic core materials on the market, carrying out melting treatment on the magnetic core materials, wherein the melting temperature is 1500 ℃, the melting time is 25min, then adding the modified pyrophyllite, and then stirring at the rotating speed of 500r/min for 25 min;
step two, modifying ores: swelling rare earth minerals with xylene at 70 ℃ for 20min in a nitrogen environment, then washing with acetone for 3 times, then putting into an oven for drying, adding ethanol and a silane coupling agent KH-570, mixing at a stirring speed of 155r/min, and then drying to obtain modified ores;
step three, modifying phillipsite: putting phillipsite into a vacuum drying oven, drying to constant weight, soaking and refluxing the phillipsite with a silane coupling agent KH550 and gamma-aminopropyl methyl dimethoxy silane of which the mass fractions are 3%, wherein the heating temperature is 105 ℃, the refluxing time is 2 hours, and then taking out and drying;
step four, adding the modified phillipsite and the modified ore into the step one for continuous melting treatment, and then cooling to room temperature;
step five, sintering treatment: and (3) feeding the cooled magnetic core into a sintering furnace for sintering treatment, naturally cooling to room temperature, and finally performing porous graphene dispersion treatment.
Preferably, the modificationThe pyrophyllite is prepared by spreading pyrophyllite on glass plate with thickness of 2mm, and then adopting HL1500 type helium-free crossflow CO2And the laser processing machine carries out surface modification on the pyrophyllite.
The laser power of this example was 55W.
The sintering furnace of this example first sinters at 1500 ℃ for 20 min.
The preparation method of the porous graphene comprises the steps of adding the porous graphene into a modification solution to react for 25min, washing with deionized water for 4 times, adding 60% dilute sulfuric acid by mass percent to treat for 30min, and adjusting the pH value with sodium hydroxide.
The modified liquid of the embodiment comprises the following raw materials in parts by weight: 30 parts of hydroxyethyl cellulose ether, 25 parts of hydrochloric acid, 30 parts of deionized water and 25 parts of sodium pyrophosphate.
Example 3:
the preparation method of the corrosion-resistant magnetic ferrite core comprises the following steps:
the method comprises the following steps: selecting magnetic core materials on the market, carrying out melting treatment on the magnetic core materials, wherein the melting temperature is 1250 ℃, the melting time is 20min, then adding the modified pyrophyllite, and then stirring the mixture for 20min at the rotating speed of 300 r/min;
step two, modifying ores: swelling rare earth minerals with xylene at 70 ℃ for 20min in a nitrogen environment, then washing with acetone for 3 times, then putting into an oven for drying, adding ethanol and a silane coupling agent KH-570, mixing at a stirring speed of 155r/min, and then drying to obtain modified ores;
step three, modifying phillipsite: putting phillipsite into a vacuum drying oven, drying to constant weight, soaking and refluxing the phillipsite with a silane coupling agent KH550 and gamma-aminopropyl methyl dimethoxy silane with the mass fraction of 3% respectively, heating to 100 ℃, refluxing for 2 hours, and taking out and drying;
step four, adding the modified phillipsite and the modified ore into the step one for continuous melting treatment, and then cooling to room temperature;
step five, sintering treatment: and (3) feeding the cooled magnetic core into a sintering furnace for sintering treatment, naturally cooling to room temperature, and finally performing porous graphene dispersion treatment.
Preferably, the modified pyrophyllite is formed by spreading pyrophyllite on a glass plate with the thickness of 1.5mm, and then adopting HL1500 type helium-free crossflow CO2And the laser processing machine carries out surface modification on the pyrophyllite.
The laser power of this example was 50W.
The sintering furnace of this example first sinters at 1250 ℃ for 15 min.
The preparation method of the porous graphene comprises the steps of adding the porous graphene into a modification solution to react for 20min, washing with deionized water for 4 times, adding 55% by mass of dilute sulfuric acid to treat for 25min, and adjusting the pH value with sodium hydroxide.
The modified liquid of the embodiment comprises the following raw materials in parts by weight: 25 parts of hydroxyethyl cellulose ether, 20 parts of hydrochloric acid, 25 parts of deionized water and 20 parts of sodium pyrophosphate.
Comparative example 1:
the materials and preparation process are basically the same as those of example 3, except that the materials which are conventional in the market are adopted.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A preparation method of the corrosion-resistant magnetic ferrite core is characterized by comprising the following steps:
the method comprises the following steps: selecting magnetic core materials on the market, carrying out melting treatment on the magnetic core materials, wherein the melting temperature is 1000-1500 ℃, the melting time is 15-25min, then adding the modified pyrophyllite, and then stirring at the rotating speed of 100-500r/min for 15-25 min;
step two, modifying ores: swelling rare earth minerals with xylene at 70 ℃ for 20min in a nitrogen environment, then washing with acetone for 3 times, then putting into an oven for drying, adding ethanol and a silane coupling agent KH-570, mixing at a stirring speed of 155r/min, and then drying to obtain modified ores;
step three, modifying phillipsite: putting phillipsite into a vacuum drying oven, drying to constant weight, soaking and refluxing with 3% by mass of silane coupling agent KH550 and gamma-aminopropyl methyl dimethoxy silane respectively at the heating temperature of 95-105 ℃ for 2h, and taking out and drying;
step four, adding the modified phillipsite and the modified ore into the step one for continuous melting treatment, and then cooling to room temperature;
step five, sintering treatment: and (3) feeding the cooled magnetic core into a sintering furnace for sintering treatment, naturally cooling to room temperature, and finally performing porous graphene dispersion treatment.
2. The method of claim 1, wherein the modified pyrophyllite is formed by coating pyrophyllite on a glass plate with a thickness of 1-2mm, and then using HL1500 helium-free crossflow CO2And the laser processing machine carries out surface modification on the pyrophyllite.
3. The method as claimed in claim 2, wherein the laser power is 45-55W.
4. The method as claimed in claim 3, wherein the laser power is 50W.
5. The method as claimed in claim 1, wherein the sintering furnace is first sintered at 1500 ℃ and 1000 ℃ for 10-20 min.
6. The process of claim 5, wherein the sintering is performed at 1250 ℃ for 15 min.
7. The method for preparing a corrosion-resistant magnetic ferrite core according to claim 1, wherein the porous graphene is prepared by adding the porous graphene into the modification solution to react for 15-25min, then washing with deionized water for 3-4 times, then adding dilute sulfuric acid with a mass fraction of 50-60% to treat for 20-30min, and then adjusting the pH with sodium hydroxide.
8. The method for preparing the corrosion-resistant magnetic ferrite core according to claim 7, wherein the modifying solution comprises the following raw materials in parts by weight: 20-30 parts of hydroxyethyl cellulose ether, 15-25 parts of hydrochloric acid, 20-30 parts of deionized water and 15-25 parts of sodium pyrophosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550217.5A CN111875369A (en) | 2020-06-16 | 2020-06-16 | Preparation method of corrosion-resistant magnetic ferrite core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550217.5A CN111875369A (en) | 2020-06-16 | 2020-06-16 | Preparation method of corrosion-resistant magnetic ferrite core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111875369A true CN111875369A (en) | 2020-11-03 |
Family
ID=73156789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010550217.5A Pending CN111875369A (en) | 2020-06-16 | 2020-06-16 | Preparation method of corrosion-resistant magnetic ferrite core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111875369A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465063A (en) * | 2014-12-20 | 2015-03-25 | 陈红 | Method for preparing anti-corrosion iron-silicon-based magnetic core |
| CN108751719A (en) * | 2018-06-13 | 2018-11-06 | 合肥协耀玻璃制品有限公司 | A kind of preparation method based on modified grammite devitrified glass |
| CN109364580A (en) * | 2018-11-06 | 2019-02-22 | 江苏三元环保科技有限公司 | A kind of filter cloth and preparation method thereof with antibacterial functions |
| CN109503010A (en) * | 2018-11-15 | 2019-03-22 | 合肥嘉仕诚能源科技有限公司 | A kind of method of modifying efficiently removing formaldehyde diatom ooze |
-
2020
- 2020-06-16 CN CN202010550217.5A patent/CN111875369A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465063A (en) * | 2014-12-20 | 2015-03-25 | 陈红 | Method for preparing anti-corrosion iron-silicon-based magnetic core |
| CN108751719A (en) * | 2018-06-13 | 2018-11-06 | 合肥协耀玻璃制品有限公司 | A kind of preparation method based on modified grammite devitrified glass |
| CN109364580A (en) * | 2018-11-06 | 2019-02-22 | 江苏三元环保科技有限公司 | A kind of filter cloth and preparation method thereof with antibacterial functions |
| CN109503010A (en) * | 2018-11-15 | 2019-03-22 | 合肥嘉仕诚能源科技有限公司 | A kind of method of modifying efficiently removing formaldehyde diatom ooze |
Non-Patent Citations (1)
| Title |
|---|
| 曾德麟: "《粉末冶金材料》", 30 November 1989 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104891982A (en) | Rare earth high-magnetic-permeability soft magnetic ferrite and preparation method thereof | |
| CN102795850B (en) | Wide-temperature ultralow-loss manganese zinc power ferrite magnetic core | |
| CN103456479A (en) | Method for manufacturing high-temperature-resistant metal soft magnetic powder core | |
| CN102303116A (en) | Manufacturing method of mu40 ferrum silicon aluminum magnetic powder core | |
| CN113831119B (en) | Ultrahigh B s Low-loss manganese-zinc ferrite material and preparation method thereof | |
| CN111540558B (en) | Composite soft magnetic material and preparation method thereof | |
| CN110922179B (en) | High-permeability low-loss ferrite material and preparation method thereof | |
| CN105336492A (en) | Surface insulation treating method adopting boric acid as reactant to reduce sendust core loss | |
| CN102303115A (en) | Manufacturing method of ferrum silicon material and mu26 ferrum silicon magnetic powder core | |
| CN111863424B (en) | Polyimide/inorganic oxide composite coated iron-silicon magnetic powder core and preparation method thereof | |
| CN110835261B (en) | Preparation method of high-resistivity soft magnetic ferrite material | |
| CN111875369A (en) | Preparation method of corrosion-resistant magnetic ferrite core | |
| CN102543345A (en) | Low power consumption Fe-Si-Al alloy material with magnetic conductivity mu=26 and preparation method thereof | |
| CN109704749B (en) | Ultrahigh frequency low-loss soft magnetic ferrite material and preparation method and application of magnetic core | |
| CN101183586A (en) | High magnetic conductivity, low THD soft magnetic ferrite magnetic material and method for preparing the same | |
| CN105070452A (en) | Low-loss magnetic core material used for electric appliance | |
| CN116239377A (en) | High-performance manganese zinc ferrite material, ferrite core and sintering method thereof | |
| CN102360658A (en) | Block-shaped magnetic material and preparation method thereof | |
| CN114496544A (en) | Method for manufacturing low-power-consumption iron-nickel-molybdenum magnetic powder core | |
| CN114477986A (en) | High-performance manganese-zinc soft magnetic ferrite material and preparation method thereof | |
| CN114512323A (en) | MnO-SiO2Preparation method of insulated and coated metal soft magnetic powder core | |
| CN110723967B (en) | Direct-current bias resistant low-temperature sintered ferrite material and preparation method thereof | |
| CN109599240B (en) | Ferrite soft magnetic powder core and preparation method thereof | |
| CN111777419B (en) | Sintering process of magnetic ferrite core | |
| CN103288434B (en) | Method for producing niobium-enriched ferromagnetic core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201103 |
|
| RJ01 | Rejection of invention patent application after publication |