CN111187065A - Microwave oven magnetic slurry containing ammonium polyacrylate dispersant and preparation method thereof - Google Patents
Microwave oven magnetic slurry containing ammonium polyacrylate dispersant and preparation method thereof Download PDFInfo
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- CN111187065A CN111187065A CN202010039804.8A CN202010039804A CN111187065A CN 111187065 A CN111187065 A CN 111187065A CN 202010039804 A CN202010039804 A CN 202010039804A CN 111187065 A CN111187065 A CN 111187065A
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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
- C04B35/26—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
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
- C04B35/62615—High energy or reactive ball milling
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63444—Nitrogen-containing polymers, e.g. polyacrylamides, polyacrylonitriles, polyvinylpyrrolidone [PVP], polyethylenimine [PEI]
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- 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
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- 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
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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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- Organic Chemistry (AREA)
- Power Engineering (AREA)
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- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The microwave oven magnetic slurry contains more than 98% of ferroferric oxide and 0.1% -2% of ammonium polyacrylate dispersant. The invention also comprises a preparation method of the microwave oven magnetic slurry. The microwave oven magnetic slurry has high viscosity and good stability and consistency, can shorten the manufacturing time of a microwave oven magnetic component, improve the production efficiency of the microwave oven magnetic component, improve the magnetic performance of the produced microwave oven magnetic component, has higher center Gauss, lower product cracking rate and higher qualification rate, and can reduce the production cost.
Description
Technical Field
The invention relates to magnetic slurry and a preparation method thereof, in particular to microwave oven magnetic slurry containing a polyammonium acrylate dispersant and a preparation method thereof.
Background
At present, the method for improving the magnetic property of the permanent magnetic ferrite by adding the calcium gluconate dispersing agent is a common method in the industry, and has an instant effect on the improvement of the magnetic property of the product. However, the process has the following disadvantages: because the melting point of the calcium gluconate is 195 ℃ and the flash point is 375 ℃, viscous liquid formed by melting the calcium gluconate remained in the green body at 195 ℃ in the sintering process is easy to block capillary pores of the green body to influence water vapor discharge, the calcium gluconate is violently decomposed after 375 ℃, the surface of the green body is easy to prop up cracks, and due to the reasons, products added with the calcium gluconate are easy to have various bright and dark crack defects, and the product percent of pass is directly influenced. Part of calcium gluconate is easy to separate out during slurry precipitation and green body drying to form particles which are enriched on the surface of the green body, and the green body is easy to generate air hole defects after being sintered, thereby directly influencing the product percent of pass.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides microwave oven magnetic slurry containing ammonium polyacrylate dispersant. When the magnetic slurry is used for preparing a microwave oven magnetic component, the product is not easy to crack and have air holes, and the qualification rate is high.
The invention further aims to solve the technical problem of overcoming the defects in the prior art and provides a preparation method of microwave oven magnetic slurry containing the ammonium polyacrylate dispersant.
The technical scheme adopted by the invention for solving the technical problems is as follows: a microwave oven magnetic slurry containing ammonium polyacrylate dispersant contains more than 98% of magnetic ferrite particles and 0.1% -2.0% of ammonium polyacrylate dispersant.
Further, the ammonium polyacrylate dispersant is prepared by the following method: mixing polyacrylic acid (monomer formula C)3H4O2) And acrylamide (formula C)3H5NO) are mixed in equal volume and are subjected to chemical reaction to form liquid ammonium polyacrylate (molecular formula C)3H4O2C3H5NO）。
Further, the ammonium polyacrylate dispersant is commercially available liquid ammonium polyacrylate.
The technical scheme adopted for further solving the technical problems is as follows: a preparation method of microwave oven magnetic slurry containing ammonium polyacrylate dispersant comprises the following steps: and placing the two raw materials of the magnetic ferrite particles and the ammonium polyacrylate dispersant into a ball mill, and performing ball milling and uniform mixing to obtain the magnetic ferrite particle.
Furthermore, in the two raw materials, the mass fraction of the magnetic ferrite particles is more than or equal to 98 percent, and the balance is ammonium polyacrylate dispersant.
Further, the rotating speed of the ball mill is 22-24 revolutions per minute; the ball milling time is 8-12 h.
Further, the temperature of the materials in the ball mill is 50-80 ℃.
Further, the ball mill is a QM1500 ball mill.
The principle of the invention is as follows: two kinds of raw materials magnetic ferrite granule and polyacrylic acid ammonium dispersant, at ball-milling mixing process, not only magnetic ferrite granule can be levigated, and polyacrylic acid ammonium dispersant also can be adsorbed on magnetic ferrite granule surface step by step, because of there is the clearance between magnetic ferrite granule and the granule, the clearance can also be propped open by the polyacrylic acid ammonium dispersant who adsorbs on magnetic ferrite granule surface, makes the distribution homogeneity of magnetic ferrite granule better to improve the viscosity of magnetic slurry, and improve its stability and uniformity.
The invention has the beneficial effects that: by adding the ammonium polyacrylate dispersant into the microwave oven magnetic slurry, the viscosity of the microwave oven magnetic slurry is improved, the performance is more stable, the consistency is better, the manufacturing time of the microwave oven magnetic component can be shortened, the production efficiency of the microwave oven magnetic component is improved, the magnetic performance of the produced microwave oven magnetic product can be improved, the center Gauss is higher, the product cracking rate is lower, the qualification rate is improved, and the production cost is reduced.
Detailed Description
The present invention will be further described with reference to the following examples.
The liquid ammonium polyacrylates used in the examples of the present invention described below were obtained from the fast commercial company, Inc. (imported, Guangzhou), model number 4140As/4040As, and were obtained by conventional commercial means.
Example 1
The magnetic slurry of the microwave oven of the embodiment contains 1 kg of liquid ammonium polyacrylate and 999 kg of magnetic ferrite particles;
the preparation method comprises the following steps:
and (2) putting 1 kg of liquid ammonium polyacrylate and 999 kg of magnetic ferrite particles into a QM1500 ball mill, controlling the rotating speed of the ball mill to be 24 r/min, and uniformly mixing the liquid ammonium polyacrylate dispersant and the magnetic ferrite particles in the ball milling process, wherein the material temperature in the ball mill is 65 ℃, and the ball milling is carried out for 10 h.
According to the known ferrite production process flow: the microwave oven magnetic slurry obtained in the embodiment is subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging and warehousing.
4389 pieces of the molded microwave oven magnetic green part are processed into qualified products with phi of 61.5 multiplied by 19.8 multiplied by 12.4 microwave oven magnetic steel 4126 pieces after the procedures of high-temperature sintering, grinding processing, cleaning, appearance inspection and the like, the unqualified products are 263 pieces, the center gauss is 201.1-202.6 mT (the required value is more than or equal to 194 mT), and the final product percent of pass is 94.0 percent.
Example 2
The microwave oven magnetic slurry containing the dispersant of the embodiment contains 2 kg of liquid ammonium polyacrylate and 998 kg of magnetic ferrite particles;
the preparation method comprises the following steps:
and (2) placing 2 kg of liquid ammonium polyacrylate and 998 kg of magnetic ferrite particles into a QM1500 ball mill, controlling the rotating speed of the ball mill to be 23 r/min, uniformly mixing the liquid ammonium polyacrylate dispersant and the magnetic ferrite particles in the ball milling process, and carrying out ball milling for 12h at the temperature of 58 ℃ in the ball mill to obtain the magnetic ferrite particles.
According to the known ferrite production process flow: the microwave oven magnetic slurry obtained in the embodiment is subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging and warehousing.
The molded microwave oven magnetic green parts are processed into 4276 pieces, after the processes of high-temperature sintering, grinding, cleaning, appearance inspection and the like, qualified products are processed into phi 61.5 multiplied by 19.8 multiplied by 12.4 microwave oven magnetic steel 4011 pieces, unqualified products are 265 pieces, the center gauss is 203.1-204.2 mT (the required value is more than or equal to 194 mT), and the qualification rate of final products is counted to be 93.8%.
Example 3
The microwave oven magnetic slurry containing the dispersant of this example contained 3 kg and 997 kg of magnetic ferrite particles of liquid ammonium polyacrylate;
the preparation method comprises the following steps:
and (3) putting 3 kg of liquid ammonium polyacrylate and 997 kg of magnetic ferrite particles into a QM1500 ball mill, controlling the rotating speed of the ball mill to be 24 r/min, and uniformly mixing the liquid ammonium polyacrylate dispersant and the magnetic ferrite particles in the ball milling process, wherein the temperature of materials in the ball mill is 66 ℃ and the ball milling time is 10 h.
According to the known ferrite production process flow: the microwave oven magnetic slurry obtained in the embodiment is subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging and warehousing.
4310 pieces of the molded microwave oven magnetic green part are processed into qualified products of phi 61.5 multiplied by 19.8 multiplied by 12.4 pieces of microwave oven magnetic steel 4060 pieces, unqualified products of 250 pieces and center gauss of 203.1-204.5 mT (the requirement value is more than or equal to 194 mT) after the procedures of high-temperature sintering, grinding, cleaning, appearance inspection and the like, and the qualification rate of the final product is calculated to be 94.2%.
Example 4
The microwave oven magnetic slurry containing the dispersant of the present example: 4 kg of liquid ammonium polyacrylate and 996 kg of magnetic ferrite particles;
the preparation method comprises the following steps:
putting 4 kg of liquid ammonium polyacrylate and 996 kg of magnetic ferrite particles into a QM1500 ball mill, controlling the rotating speed of the ball mill to be 24 r/min, uniformly mixing the liquid ammonium polyacrylate dispersant and the magnetic ferrite particles in the ball milling process, and carrying out ball milling for 12h at the temperature of 70 ℃ during ball milling.
According to the known ferrite production process flow: the microwave oven magnetic slurry obtained in the embodiment is subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging and warehousing.
The molded microwave oven magnetic green parts are processed into qualified products of phi 61.5 multiplied by 19.8 multiplied by 12.4 microwave oven magnetic steel 4042 sheets, unqualified products of 254 sheets, central gausses of 204.3-205.8 mT (the requirement value is more than or equal to 194 mT) after the processes of high-temperature sintering, grinding, cleaning, appearance inspection and the like, wherein the qualified product percent is 94.1%.
Example 5
The microwave oven magnetic slurry containing the dispersant of the present example: 5 kg of liquid ammonium polyacrylate and 995 kg of magnetic ferrite particles;
the preparation method comprises the following steps:
and (2) putting 5 kg of liquid ammonium polyacrylate and 995 kg of magnetic ferrite particles into a QM1500 ball mill, controlling the rotating speed of the ball mill to be 24 r/min, uniformly mixing the liquid ammonium polyacrylate dispersant and the magnetic ferrite particles in the ball milling process, and carrying out ball milling for 12h at the temperature of 65 ℃ of materials in the ball mill.
According to the known ferrite production process flow: the microwave oven magnetic slurry obtained in the embodiment is subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging and warehousing.
The molded microwave oven magnetic green parts are processed into qualified products of phi 61.5 multiplied by 19.8 multiplied by 12.4 microwave oven magnetic steel 3836 sheets, unqualified products of 329 sheets and central gauss of 205.4-206.3 mT (the requirement value is more than or equal to 194 mT) after the processes of high-temperature sintering, grinding, cleaning, appearance inspection and the like, and the qualification rate of the final products is counted to be 92.1%.
Example 6
The microwave oven magnetic slurry containing the dispersant of this example: containing 7 kg of liquid ammonium polyacrylate and 993 kg of magnetic ferrite particles.
The preparation method comprises the following steps:
and (2) putting 7 kg of liquid ammonium polyacrylate and 993 kg of magnetic ferrite particles into a QM1500 ball mill, controlling the rotating speed of the ball mill to be 24 r/min, uniformly mixing the liquid ammonium polyacrylate dispersant and the magnetic ferrite particles in the ball milling process, and carrying out ball milling for 9h at the temperature of 66 ℃ of materials in the ball mill.
According to the known ferrite production process flow: the microwave oven magnetic slurry obtained in the embodiment is subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging and warehousing.
4216 pieces of molded microwave oven magnetic green parts are processed into qualified products of phi 61.5 multiplied by 19.8 multiplied by 12.4 pieces of microwave oven magnetic steel 3912 pieces after the procedures of high-temperature sintering, grinding processing, cleaning, appearance inspection and the like, the unqualified products are 304 pieces, the center gauss is 205.4 to 205.9 to mT (the required value is more than or equal to 194 mT), and the final product percent of pass is counted to be 92.8%.
Claims (10)
1. A microwave oven magnetic slurry containing ammonium polyacrylate dispersant is characterized by containing more than 98% of ferroferric oxide and 0.1% -2% of ammonium polyacrylate dispersant.
2. The magnetic slurry for microwave oven containing polyammonium acrylate dispersant according to claim 1, wherein: the ammonium polyacrylate dispersant is prepared by carrying out chemical reaction on polyacrylic acid and acrylamide after being mixed in equal volume, thereby forming liquid ammonium polyacrylate.
3. The magnetic slurry for microwave oven containing polyammonium acrylate dispersant according to claim 1, wherein: the ammonium polyacrylate dispersant is commercially available liquid ammonium polyacrylate.
4. A preparation method of microwave oven magnetic slurry containing ammonium polyacrylate dispersant is characterized in that: the method comprises the following steps: and placing the two raw materials of the magnetic ferrite ferroferric oxide particles and the ammonium polyacrylate dispersant into a ball mill, and performing ball milling and uniform mixing to obtain the magnetic ferrite ferroferric oxide/ammonium polyacrylate dispersant.
5. The method for preparing microwave oven magnetic slurry containing polyammonium acrylate dispersant according to claim 4, wherein: in the two raw materials, the mass fraction of the magnetic ferrite particles is more than or equal to 98 percent, and the balance is ammonium polyacrylate dispersant.
6. The method for preparing microwave oven magnetic slurry containing polyammonium acrylate dispersant according to claim 4 or 5, wherein: the rotating speed of the ball mill is 22-24 revolutions per minute; the ball milling time is 8-10 h.
7. The method for preparing microwave oven magnetic slurry containing polyammonium acrylate dispersant according to claim 4 or 5, wherein: the temperature of the materials in the ball mill is 50-80 ℃.
8. The method for preparing magnetic slurry containing polyammonium acrylate dispersant for microwave oven according to claim 6, wherein: the temperature of the materials in the ball mill is 50-80 ℃.
9. The method for preparing microwave oven magnetic slurry containing polyammonium acrylate dispersant according to claim 5, wherein: the ball mill is a QM1500 ball mill.
10. The method for preparing magnetic slurry containing polyammonium acrylate dispersant for microwave oven according to claim 6, wherein: the ball mill is a QM1500 ball mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010039804.8A CN111187065A (en) | 2020-01-15 | 2020-01-15 | Microwave oven magnetic slurry containing ammonium polyacrylate dispersant and preparation method thereof |
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| CN202010039804.8A CN111187065A (en) | 2020-01-15 | 2020-01-15 | Microwave oven magnetic slurry containing ammonium polyacrylate dispersant and preparation method thereof |
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| CN102786810A (en) * | 2011-05-18 | 2012-11-21 | 中国石油化工股份有限公司 | Magnetic polymer particle, its preparation method and its application |
| WO2018157399A1 (en) * | 2017-03-03 | 2018-09-07 | 深圳市佩成科技有限责任公司 | Preparation method for fe3o4/mwcnts-paraffin composite material |
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2020
- 2020-01-15 CN CN202010039804.8A patent/CN111187065A/en active Pending
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| CN102154832A (en) * | 2010-12-31 | 2011-08-17 | 泉州红瑞兴纺织有限公司 | Fabric coating finishing agent with electromagnetic shielding function and preparation method thereof |
| CN102786810A (en) * | 2011-05-18 | 2012-11-21 | 中国石油化工股份有限公司 | Magnetic polymer particle, its preparation method and its application |
| CN102390872A (en) * | 2011-08-09 | 2012-03-28 | 东南大学 | Preparation method of micrometer-scale cubic ultrodispersed ferroferric oxide particles |
| CN102555317A (en) * | 2012-01-05 | 2012-07-11 | 深圳市宜丽环保科技有限公司 | Magnetic anti-counterfeiting health-care material and production method thereof |
| WO2018157399A1 (en) * | 2017-03-03 | 2018-09-07 | 深圳市佩成科技有限责任公司 | Preparation method for fe3o4/mwcnts-paraffin composite material |
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Application publication date: 20200522 |