CN112225572A - Novel permanent magnetic ferrite magnetic shoe - Google Patents
Novel permanent magnetic ferrite magnetic shoe Download PDFInfo
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- CN112225572A CN112225572A CN202011113093.0A CN202011113093A CN112225572A CN 112225572 A CN112225572 A CN 112225572A CN 202011113093 A CN202011113093 A CN 202011113093A CN 112225572 A CN112225572 A CN 112225572A
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- 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
- C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
- C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium
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Abstract
The invention discloses a novel permanent magnetic ferrite magnetic tile, which comprises 82-90% of iron oxide red material, 6-8% of strontium carbonate, 2-3% of calcium carbonate, 0.5-1% of aluminum oxide, 1-2% of chromium oxide, 0.5-1% of boric acid, 1-2% of selenium oxide, 2-4% of cobalt oxide, 3-5% of lanthanum oxide, 0.5-1% of silicate fiber, 0.1-0.6% of a separating agent and 0.2-0.8% of a cleaning agent. The novel permanent magnetic ferrite magnetic shoe belongs to the field of permanent magnetic ferrite magnetic shoes, can increase the permanent magnetism of the permanent magnetic ferrite magnetic shoe, thereby improving the comprehensive performance of the permanent magnetic ferrite magnetic shoe, more effectively applying the permanent magnetic ferrite magnetic shoe, and adopting a centrifuge mixing and rapid quenching method for processing, thereby improving the production speed and quality of the permanent magnetic ferrite magnetic shoe, improving the overall production efficiency of the permanent magnetic ferrite magnetic shoe and bringing convenience for the production of the permanent magnetic ferrite magnetic shoe.
Description
Technical Field
The invention relates to the field of permanent magnetic ferrite magnetic shoes, in particular to a novel permanent magnetic ferrite magnetic shoe.
Background
The permanent magnetic ferrite magnetic shoe is a ferrite magnetic shoe with a permanent magnetic state, the magnetic performance of the permanent magnetic ferrite magnetic shoe shows that the ferrite has higher magnetic conductivity in high frequency, therefore, the ferrite becomes a nonmetal magnetic material with wide application in the field of high frequency and weak current, because the magnetic energy stored in the unit volume of the ferrite is lower and the saturation magnetization is also lower (usually only 1/3-1/5 of pure iron), the application of the permanent magnetic ferrite magnetic shoe in the fields of high frequency generation, strong current and high power requiring higher magnetic energy density is limited, the permanent magnetic ferrite magnetic shoe is easy to turn in magnetic field molding particles, so that higher orientation degree is obtained compared with dry pressure differential performance, the performance of the permanent magnetic ferrite magnetic shoe is higher, and the permanent magnetic ferrite magnetic shoe is used in various;
when the existing novel permanent magnetic ferrite magnetic shoe is used, the overall performance of the permanent magnetic ferrite magnetic shoe is low, and the comprehensive performance of the permanent magnetic ferrite magnetic shoe cannot be improved, so that the permanent magnetic ferrite magnetic shoe cannot be more effectively applied.
Disclosure of Invention
The invention mainly aims to provide a novel permanent magnetic ferrite magnetic shoe which can effectively solve the problems that the overall performance of the permanent magnetic ferrite magnetic shoe of a cable in the background technology is low and the production quality of the permanent magnetic ferrite magnetic shoe is reduced.
In order to achieve the purpose, the invention adopts the technical scheme that:
a magnetic shoe of permanent magnetic ferrite is prepared from iron red (82-90 wt.%), strontium carbonate (6-8), calcium carbonate (2-3), aluminium oxide (0.5-1), chromium oxide (1-2), boric acid (0.5-1), selenium oxide (1-2), cobalt oxide (2-4), lanthanum oxide (3-5), silicate fibre (0.5-1), sulfuric acid (0.1-0.6) and detergent (0.2-0.8).
Preferably, the iron oxide red material comprises 85% of iron oxide red, 6% of strontium carbonate, 2% of calcium carbonate, 0.5% of aluminum oxide, 1% of chromium oxide, 0.5% of boric acid, 1% of selenium oxide, 2% of cobalt oxide, 3% of lanthanum oxide, 0.5% of silicate fiber, 0.1% of a partitioning agent and 0.2% of a cleaning agent.
The preparation process of the novel permanent magnetic ferrite magnetic shoe comprises the following steps:
s1, mixing and grinding: mixing strontium carbonate, iron oxide red material and calcium carbonate according to weight percentage to form pre-sintering material;
s2, grinding raw materials: mixing the pre-sintered materials, and then putting the mixture into a ball mill for ball milling until the particle size is below 1.5-1.8 um;
s3, block making and pre-sintering: adding water into the ground pre-sintering material particles, stirring, pressing into blocks, and placing the blocks into a furnace to be fired at the temperature of 1250-;
s4, crushing treatment: crushing the blocking material to a particle size of 2.8-3.5 um, adding aluminum oxide, chromium oxide, boric acid, selenium oxide, cobalt oxide, lanthanum oxide and silicate fiber, and uniformly mixing;
s5, secondary grinding: firstly, performing rough ball milling on a mixed material in a ball mill, controlling the granularity of slurry to be 1.0-1.3 um, then, pumping the slurry into a fine ball mill, grinding the slurry to the particle size of 1-1.5 um, dehydrating the slurry, controlling the water content to be 32-34%, and adding 0.1-0.3% of silicate fiber, a dispersing agent and a grinding aid for ball milling according to the weight part ratio;
s6, blank: injecting the material into a mold, and preparing into a green body under the pressure of 20-21 Mpa;
s7, sintering: placing the green body into a furnace to be sintered at the temperature of 1130-;
s8, cooling and grinding: and after the sintered material is cooled, grinding the sintered material to a required geometric size to obtain a finished product of the permanent magnetic ferrite magnetic shoe.
Preferably, in the step S4, the accessories are stirred and mixed by a centrifugal stirrer.
Preferably, the ratio of the dispersing agent to the grinding aid in the step S5 is 1: 0.003-0.005: 0.001-0.003, the pH value of the slurry is controlled to be 7-9, and the particle size of the slurry is controlled to be 0.75-0.85 um.
Preferably, in the step S6, 5-7 ten thousand ampere-turn direct-current magnetic fields are used for magnetizing, 9-10 ten thousand ampere-turn pulse magnetic fields are simultaneously superposed, the orientation degree is not less than 98%, and the green body density is 3.2g/cm 3-3.4 g/cm 3.
Preferably, the temperature of the S8 green body is reduced by a rapid quenching method after sintering.
Compared with the prior art, the novel permanent magnetic ferrite magnetic shoe has the following beneficial effects:
this novel permanent magnetic ferrite magnetic shoe through the compounding grinding, raw materials grinding, the system piece is preburning, the secondary grinding process that sets up, can increase the permanent magnetism of permanent magnetic ferrite magnetic shoe to improve the comprehensive properties of permanent magnetic ferrite magnetic shoe, more effectual is applied permanent magnetic ferrite magnetic shoe.
Through the arranged procedures of blank forming, sintering and cooling grinding, the centrifugal machine mixing and rapid quenching method is adopted for processing, and the production speed and the quality of the permanent magnetic ferrite magnetic shoe are improved, so that the overall production efficiency of the permanent magnetic ferrite magnetic shoe is improved, and convenience is brought to the production of the permanent magnetic ferrite magnetic shoe.
Drawings
FIG. 1 is a schematic diagram of a preparation process of a novel permanent magnetic ferrite magnetic shoe of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The formula of the novel permanent magnetic ferrite magnetic tile comprises 82-90% of iron oxide red material, 6-8% of strontium carbonate, 2-3% of calcium carbonate, 0.5-1% of aluminum oxide, 1-2% of chromium oxide, 0.5-1% of boric acid, 1-2% of selenium oxide, 2-4% of cobalt oxide, 3-5% of lanthanum oxide, 0.5-1% of silicate fiber, 0.1-0.6% of a segregation agent and 0.2-0.8% of a cleaning agent;
85% of iron red, 6% of strontium carbonate, 2% of calcium carbonate, 0.5% of aluminum oxide, 1% of chromium oxide, 0.5% of boric acid, 1% of selenium oxide, 2% of cobalt oxide, 3% of lanthanum oxide, 0.5% of silicate fiber, 0.1% of a segregation agent and 0.2% of a cleaning agent.
As shown in fig. 1, the preparation process of the novel permanent ferrite magnetic shoe comprises the following steps:
s1, mixing and grinding: mixing strontium carbonate, iron oxide red material and calcium carbonate according to weight percentage to form pre-sintering material;
s2, grinding raw materials: mixing the pre-sintered materials, and then putting the mixture into a ball mill for ball milling until the particle size is below 1.5-1.8 um;
s3, block making and pre-sintering: adding water into the ground pre-sintering material particles, stirring, pressing into blocks, and placing the blocks into a furnace to be fired at the temperature of 1250-;
s4, crushing treatment: crushing the blocking material to a particle size of 2.8-3.5 um, adding aluminum oxide, chromium oxide, boric acid, selenium oxide, cobalt oxide, lanthanum oxide and silicate fiber, and uniformly mixing;
s5, secondary grinding: firstly, performing rough ball milling on a mixed material in a ball mill, controlling the granularity of slurry to be 1.0-1.3 um, then, pumping the slurry into a fine ball mill, grinding the slurry to the particle size of 1-1.5 um, dehydrating the slurry, controlling the water content to be 32-34%, and adding 0.1-0.3% of silicate fiber, a dispersing agent and a grinding aid for ball milling according to the weight part ratio;
s6, blank: injecting the material into a mold, and preparing into a green body under the pressure of 20-21 Mpa;
s7, sintering: placing the green body into a furnace to be sintered at the temperature of 1130-;
s8, cooling and grinding: and after the sintered material is cooled, grinding the sintered material to a required geometric size to obtain a finished product of the permanent magnetic ferrite magnetic shoe.
In the step S4, the centrifugal stirrer is adopted to stir and mix the accessories uniformly, the centrifugal stirrer can quickly mix and stir the accessories, and the stirring quality of the accessories is improved; the ratio of the dispersing agent to the grinding aid in the step S5 is 1: 0.003-0.005: 0.001-0.003, the pH value of the slurry is controlled to be 7-9, the particle size of the slurry is controlled to be 0.75-0.85 um, and the dispersing agent and the grinding aid can increase the quality of the material during grinding; in the S6 procedure, 5-7 ten thousand ampere turns of direct current magnetic field are used for magnetizing, 9-10 ten thousand ampere turns of pulse magnetic field are simultaneously superposed, the orientation degree is more than or equal to 98 percent, the green body density is 3.2g/cm 3-3.4 g/cm3, and the direct current magnetic field is used for magnetizing to enable the permanent magnetic ferrite magnetic shoe to form a permanent magnetic state; and after sintering the S8 green compact, cooling by adopting an emergency quenching method, wherein the permanent magnetic ferrite magnetic shoe can be rapidly cooled by cooling by adopting the emergency quenching method, and the permanent magnetic ferrite magnetic shoe is prevented from cracking.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The formula of the novel permanent magnetic ferrite magnetic shoe is characterized in that: comprises 82 to 90 percent of iron oxide red, 6 to 8 percent of strontium carbonate, 2 to 3 percent of calcium carbonate, 0.5 to 1 percent of aluminum oxide, 1 to 2 percent of chromium oxide, 0.5 to 1 percent of boric acid, 1 to 2 percent of selenium oxide, 2 to 4 percent of cobalt oxide, 3 to 5 percent of lanthanum oxide, 0.5 to 1 percent of silicate fiber, 0.1 to 0.6 percent of dispersant and 0.2 to 0.8 percent of cleaning agent.
2. The formula of the novel permanent ferrite magnetic shoe according to claim 1, characterized in that: 85% of iron red, 6% of strontium carbonate, 2% of calcium carbonate, 0.5% of aluminum oxide, 1% of chromium oxide, 0.5% of boric acid, 1% of selenium oxide, 2% of cobalt oxide, 3% of lanthanum oxide, 0.5% of silicate fiber, 0.1% of a segregation agent and 0.2% of a cleaning agent.
3. The preparation process of the novel permanent magnetic ferrite magnetic shoe is characterized by comprising the following steps of:
s1, mixing and grinding: mixing strontium carbonate, iron oxide red material and calcium carbonate according to weight percentage to form pre-sintering material;
s2, grinding raw materials: mixing the pre-sintered materials, and then putting the mixture into a ball mill for ball milling until the particle size is below 1.5-1.8 um;
s3, block making and pre-sintering: adding water into the ground pre-sintering material particles, stirring, pressing into blocks, and placing the blocks into a furnace to be fired at the temperature of 1250-;
s4, crushing treatment: crushing the blocking material to a particle size of 2.8-3.5 um, adding aluminum oxide, chromium oxide, boric acid, selenium oxide, cobalt oxide, lanthanum oxide and silicate fiber, and uniformly mixing;
s5, secondary grinding: firstly, performing rough ball milling on a mixed material in a ball mill, controlling the granularity of slurry to be 1.0-1.3 um, then, pumping the slurry into a fine ball mill, grinding the slurry to the particle size of 1-1.5 um, dehydrating the slurry, controlling the water content to be 32-34%, and adding 0.1-0.3% of silicate fiber, a dispersing agent and a grinding aid for ball milling according to the weight part ratio;
s6, blank: injecting the material into a mold, and preparing into a green body under the pressure of 20-21 Mpa;
s7, sintering: placing the green body into a furnace to be sintered at the temperature of 1130-;
s8, cooling and grinding: and after the sintered material is cooled, grinding the sintered material to a required geometric size to obtain a finished product of the permanent magnetic ferrite magnetic shoe.
4. The preparation process of the novel permanent magnetic ferrite magnetic shoe according to claim 3, characterized in that: and in the step S4, a centrifugal stirrer is adopted to stir and mix the accessories uniformly.
5. The preparation process of the novel permanent magnetic ferrite magnetic shoe according to claim 3, characterized in that: in the step S5, the ratio of the dispersing agent to the grinding aid is 1: 0.003-0.005: 0.001-0.003, the pH value of the slurry is controlled to be 7-9, and the particle size of the slurry is controlled to be 0.75-0.85 um.
6. The preparation process of the novel permanent magnetic ferrite magnetic shoe according to claim 3, characterized in that: in the S6 procedure, 5-7 ten thousand ampere turns of direct current magnetic field are used for magnetizing, 9-10 ten thousand ampere turns of pulse magnetic field are simultaneously superposed, the orientation degree is more than or equal to 98%, and the green body density is 3.2g/cm 3-3.4 g/cm 3.
7. The preparation process of the novel permanent magnetic ferrite magnetic shoe according to claim 3, characterized in that: and after sintering the S8 green compact, cooling by adopting a rapid quenching method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011113093.0A CN112225572A (en) | 2020-10-17 | 2020-10-17 | Novel permanent magnetic ferrite magnetic shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011113093.0A CN112225572A (en) | 2020-10-17 | 2020-10-17 | Novel permanent magnetic ferrite magnetic shoe |
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| Publication Number | Publication Date |
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| CN112225572A true CN112225572A (en) | 2021-01-15 |
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