CN114180951B - Ferrite slurry containing colemanite and preparation method thereof - Google Patents
Ferrite slurry containing colemanite and preparation method thereof Download PDFInfo
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- CN114180951B CN114180951B CN202111595540.5A CN202111595540A CN114180951B CN 114180951 B CN114180951 B CN 114180951B CN 202111595540 A CN202111595540 A CN 202111595540A CN 114180951 B CN114180951 B CN 114180951B
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- colemanite
- ferrite
- ball mill
- iron oxide
- oxide red
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 53
- 229910021540 colemanite Inorganic materials 0.000 title claims abstract description 44
- 239000002002 slurry Substances 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title abstract description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 29
- 238000000498 ball milling Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 238000000227 grinding Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 3
- 239000011812 mixed powder Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000012797 qualification Methods 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 21
- 238000007689 inspection Methods 0.000 description 11
- 238000005245 sintering Methods 0.000 description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 7
- 239000004327 boric acid Substances 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 7
- 239000008187 granular material Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 229910052810 boron oxide Inorganic materials 0.000 description 3
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
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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
- 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
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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
- C04B35/6303—Inorganic additives
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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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- 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
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- 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
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Magnetic Ceramics (AREA)
Abstract
The invention discloses a ferrite slurry containing colemanite and a preparation method thereof, wherein the ferrite slurry contains iron oxide red with the weight percentage of more than 97 percent and the colemanite with the weight percentage of 0.05 to 3.0 percent. The invention also comprises a preparation method of the ferrite slurry. The ferrite slurry has good magnetic property stability and slurry particle size distribution consistency, can effectively shorten the manufacturing period of ferrite products, improve the production efficiency of the ferrite products, improve the magnetic property of the produced ferrite products, and has lower product cracking rate, higher qualification rate and lower production cost.
Description
Technical Field
The invention relates to the field of slurry for ferrite production, in particular to a ferrite slurry containing colemanite and a preparation method thereof.
Background
At present, the method for improving the magnetic property of the permanent magnetic ferrite by adding boric acid is a common method in the industry, and plays a good role in improving the magnetic property and stability of products. However, the process has the following disadvantages: boric acid has a melting point of 169 ℃ and is heated to 100 ℃ and, owing to the continuous loss of water, it first becomes metaboric, which has three variants with melting points of 176 ℃, 201 ℃ and 236 ℃. Dehydration of boric acid to yield metaboric acid is declared to be complete. Then heating is continued, and the water is removed to generate boron oxide. The crystal boron oxide is dissolved at 450 ℃. Amorphous boron oxide has no fixed melting point and begins to soften at 325 c, becoming liquid throughout 500 c. The viscous liquid formed by melting boric acid remained in a blank (a molded and pressed product, also called a green body) at 169 ℃ in the sintering process is easy to block capillary pores of the blank to influence water vapor discharge, and after the temperature is continuously increased, the tension of the viscous liquid releases the surface of the blank, so that the phenomena of boric acid cracking or geriatric cracking and the like are caused. Boric acid is precipitated in the blank drying process to form particles which are enriched on the surface of the blank, and the blank is easy to generate defects such as cracks and the like after being sintered, so that the product percent of pass is directly influenced.
Disclosure of Invention
The invention aims to provide a ferrite slurry containing colemanite and a preparation method thereof, which aim to solve the problem that cracks are easy to appear on a finished product when boric acid is adopted to prepare a permanent magnetic ferrite in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a ferrite slurry containing colemanite comprises iron oxide red particles with the weight percentage of more than or equal to 97 percent and the colemanite with the weight percentage of 0.1 to 3.0 percent, wherein the colemanite is powder.
Further, the weight percentage of the ferroferric oxide iron oxide red particles is more than or equal to 97%, and the weight percentage of the colemanite is 0.1% -3%.
Further, taking the iron oxide red particles and the colemanite according to the corresponding weight percentage, and grinding the iron oxide red particles and the colemanite until the iron oxide red particles and the colemanite are uniformly mixed.
Further, the iron oxide red particles and the colemanite are ball-milled into uniformly mixed powder by a ball mill.
Further, the ball mill is a QM2000 × 2800 ball mill of the QM series.
Further, when the ball mill performs ball milling, the rotating speed is 18-26 r/min, and the ball milling time is 8-14 hours.
Further, the internal temperature of the ball mill is controlled to be 40-90 ℃ during ball milling.
Further, the internal temperature of the ball mill is controlled to be 50-80 ℃.
The principle of the invention is as follows: ferrite granule and colemanite, in the ball-milling mixing process, the iron oxide red granule can be levigated, and colemanite also can be adsorbed on ferrite granule surface step by step, because of there is the clearance between ferrite granule and the granule, the clearance also can be strutted by the colemanite that adsorbs on ferrite granule surface, makes ferrite granule's particle size distribution homogeneity better to improve magnetic slurry's homogeneity and stability.
The invention has the beneficial effects that: by adding the colemanite into the ferrite particles, the prepared ferrite slurry particles are more uniform in particle size distribution and more stable in magnetic property, the preparation period of the ferrite product can be effectively shortened, and the production efficiency of the ferrite product is improved; meanwhile, the magnetic property of the produced ferrite product can be improved, the product cracking rate is low, the qualification rate is high, and the production cost can be reduced.
Detailed Description
The following examples of the present invention used colemanite, the crystals of which were short columnar powder. The color is white and is sold in the market.
Example 1
The ferrite paste of this example contained 1.5 kg of powdered colemanite and 798.5 kg of iron oxide red particles;
the preparation method comprises the following steps:
adding 1.5 kg of powdered colemanite and 798.5 kg of iron oxide red particles into a QM 2000X 2800 ball mill, controlling the rotating speed of the ball mill to be 20 r/min, and uniformly mixing the powdered colemanite and ferrite particles in the ball milling process, wherein the temperature of materials in the ball mill is 50 ℃, and the ball milling is carried out for 9 hours.
According to the known ferrite production process flow: the ferrite slurry obtained in this example was subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging, and warehousing.
After the formed ferrite blank 15520 sheets are subjected to high-temperature sintering, grinding, cleaning, appearance inspection and other procedures, the ferrite blank is processed into 550 qualified products 14558 sheets, 962 unqualified products, 1205 to 1215 Gs (the requirement value is 1200 +/-60 Gs), and the final product qualification rate is calculated to be 93.8%.
Example 2
The ferrite paste of this example contained 2 kg of powdered colemanite and 798 kg of iron oxide red particles;
the preparation method comprises the following steps:
adding 2 kg of powdered colemanite and 798 kg of iron oxide red particles into a QM 2000X 2800 ball mill, controlling the rotating speed of the ball mill to be 20 r/min, uniformly mixing the powdered colemanite and ferrite particles in the ball milling process, and carrying out ball milling for 11 hours at the material temperature of 50 ℃ in the ball mill to obtain the finished product.
According to the known ferrite production process flow: the ferrite slurry obtained in this example was subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging, and warehousing.
15340 molded ferrite blanks are processed into 14343 sheets of 550 qualified products after being subjected to high-temperature sintering, grinding, cleaning, appearance inspection and other procedures, 997 unqualified products are obtained, the central magnetic beam is 1210-1225 Gs (the requirement value is 1200 +/-60 Gs), and the qualification rate of the final products is 93.5% by statistics.
Example 3
The ferrite paste of this example contained 5 kg of powdered colemanite and 795 kg of iron oxide red particles;
the preparation method comprises the following steps:
adding 5 kg of powdered colemanite and 795 kg of iron oxide red particles into a QM 2000X 2800 ball mill, controlling the rotating speed of the ball mill to be 22 r/min, uniformly mixing the powdered colemanite and ferrite particles in the ball mill, and carrying out ball milling for 12 hours at the material temperature of 50 ℃ in the ball mill to obtain the finished product.
According to the known ferrite production process flow: the ferrite slurry obtained in this example was subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging, and warehousing.
15650 molded ferrite blanks are subjected to high-temperature sintering, grinding, cleaning, appearance inspection and other working procedures, and then processed into 14742 qualified products 550, 908 unqualified products and 1222 to 1236 Gs (the requirement value is 1200 +/-60 Gs), and the qualification rate of the final products is 94.2% according to statistics.
Example 4
The ferrite paste of this example contained 10 kg of powdered colemanite and 790 kg of iron oxide red particles;
the preparation method comprises the following steps:
and adding 10 kg of powdered colemanite and 790 kg of iron oxide red particles into a QM 2000X 2800 ball mill, controlling the rotating speed of the ball mill to be 22 r/min, uniformly mixing the powdered colemanite and ferrite particles in the ball mill, and carrying out ball milling for 12 hours at the material temperature of 50 ℃ in the ball mill to obtain the finished product.
According to the known ferrite production process flow: the ferrite slurry obtained in this example was subjected to inspection, ball milling, precipitation, molding, drying, sintering, grinding, cleaning, appearance inspection, packaging, and warehousing.
15280 sheets of the formed ferrite blank are processed into 550 qualified products 14365 sheets, 915 unqualified products are 915 sheets, 1225 to 1240Gs (the requirement value is 1200 +/-60 Gs), and the qualification rate of the final product is 94.01% by statistics.
The described embodiments of the present invention are only for describing the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and the technical solutions of the present invention should be modified and improved by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention which are claimed are all described in the claims.
Claims (7)
1. A ferrite slurry containing colemanite, characterized in that: the composition comprises iron oxide red particles with the weight percentage of more than or equal to 97 percent and colemanite with the weight percentage of 0.1 to 3.0 percent, wherein the colemanite is powder.
2. The method for preparing a colemanite-containing ferrite paste according to claim 1, wherein: taking the iron oxide red particles and the colemanite according to the corresponding weight percentage, and grinding the iron oxide red particles and the colemanite until the iron oxide red particles and the colemanite are uniformly mixed.
3. The method for preparing a colemanite-containing ferrite paste according to claim 2, wherein: and the iron oxide red particles and the colemanite are ball-milled into uniformly mixed powder by a ball mill.
4. The method for preparing a colemanite-containing ferrite paste according to claim 3, wherein: the ball mill is a QM series ball mill.
5. The method for preparing a colemanite-containing ferrite paste according to claim 3 or 4, wherein: when the ball mill is used for ball milling, the rotating speed is 18-26 r/min, and the ball milling time is 8-14 hours.
6. The method for preparing a colemanite-containing ferrite paste according to claim 3 or 4, wherein: the internal temperature of the ball mill is controlled to be 40-90 ℃ during ball milling.
7. The method for preparing a colemanite-containing ferrite paste according to claim 5, wherein: the internal temperature of the ball mill is controlled to be 50-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111595540.5A CN114180951B (en) | 2021-12-24 | 2021-12-24 | Ferrite slurry containing colemanite and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111595540.5A CN114180951B (en) | 2021-12-24 | 2021-12-24 | Ferrite slurry containing colemanite and preparation method thereof |
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| CN114180951A CN114180951A (en) | 2022-03-15 |
| CN114180951B true CN114180951B (en) | 2023-02-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1292735A (en) * | 1969-03-20 | 1972-10-11 | Philips Electronic Associated | Method of manufacturing a sintered ferromagnetic ferrite body |
| CN1252775A (en) * | 1997-04-18 | 2000-05-10 | 美国博拉克有限公司 | Method for producing calcium borate |
| CN105536691A (en) * | 2015-12-25 | 2016-05-04 | 国家纳米科学中心 | Magnetic nano-material based on inorganic boric acid modification as well as preparation method and application of magnetic nano-material |
-
2021
- 2021-12-24 CN CN202111595540.5A patent/CN114180951B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1292735A (en) * | 1969-03-20 | 1972-10-11 | Philips Electronic Associated | Method of manufacturing a sintered ferromagnetic ferrite body |
| CN1252775A (en) * | 1997-04-18 | 2000-05-10 | 美国博拉克有限公司 | Method for producing calcium borate |
| CN105536691A (en) * | 2015-12-25 | 2016-05-04 | 国家纳米科学中心 | Magnetic nano-material based on inorganic boric acid modification as well as preparation method and application of magnetic nano-material |
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| CN114180951A (en) | 2022-03-15 |
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Denomination of invention: A ferrite slurry containing hard borosilicate and its preparation method Granted publication date: 20230228 Pledgee: Shanghai Pudong Development Bank Limited by Share Ltd. Hefei branch Pledgor: SINOMAG TECHNOLOGY Co.,Ltd. Registration number: Y2024980019743 |
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