CN103382105B - Nickel-zinc soft magnetic ferrite material and preparation method thereof - Google Patents
Nickel-zinc soft magnetic ferrite material and preparation method thereof Download PDFInfo
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- CN103382105B CN103382105B CN201310259664.5A CN201310259664A CN103382105B CN 103382105 B CN103382105 B CN 103382105B CN 201310259664 A CN201310259664 A CN 201310259664A CN 103382105 B CN103382105 B CN 103382105B
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Abstract
The invention provides a nickel-zinc soft magnetic ferrite material and a preparation method thereof. The invention is characterized in that main components of the nickel-zinc soft magnetic ferrite material comprise, by mol, 11.5 to 12 mol of NiO, 32 to 32.5 mol of Fe3O4, 12 to 12.5 mol of ZnO, 5.2 to 5.5 mol of V2O5 and 0.2 to 0.3 mol of WO3, and modification impurities added in the main components comprise, in terms of the weight of the nickel-zinc soft magnetic ferrite material, 460 to 480 ppm of HfO2, 310 to 330 ppm of chromium boride, 250 to 280 ppm of molybdenum disulfide, 80 to 120 ppm of Ti2O and 480 to 520 ppm of PtO2. The nickel-zinc soft magnetic ferrite material provided by the invention has the characteristics of high frequency, high magnetic permeability, high Bs and high TC.
Description
Technical field
The present invention relates to technical field of magnetic materials, particularly, the present invention relates to a kind of Ni-Zn soft magnetic ferrite material and preparation method thereof.
Background technology
The high ferromagnetic oxide powder of magnetic flux density, magnetic core are to realize in the electronic equipments such as program control communication, digital technology, network communication colour TV, being used as the products such as inductor, filter, pulse transformer and making its miniaturization, the requisite electronic material of lightweight, improve constantly the magnetic flux density in magnetic material, it is the pursuit of being engaged in these professional engineers and technicians and production firm always, and the performance index of material are as all unsatisfactory in loss, frequency characteristic, Curie temperature etc.
Summary of the invention
The object of this invention is to provide a kind of Ni-Zn soft magnetic ferrite material and preparation method thereof.
The technical solution adopted in the present invention is:
A kind of Ni-Zn soft magnetic ferrite material, is characterized in that, principal component counts by molar and comprises: 11.5-12molNiO, 32-32.5mol Fe
3o
4, 12-12.5molZnO, 5.2-5.5mol V
2o
5, 0.2-0.3mol WO
3, the modification impurity adding in principal component comprises according to the weighing scale that accounts for described Ni-Zn soft magnetic ferrite material: 460-480ppm HfO
2, 310-330ppm chromium boride, 250-280ppm molybdenum bisuphide, 80-120ppmTi
2o3,480-520ppm PtO
2;
The preparation method of described Ni-Zn soft magnetic ferrite material, is characterized in that comprising the following steps:
(1) batching: principal component is prepared burden, and add modification impurity;
(2) once sintered: batching is blended in pre-burning 1-2 hour under the condition of 540 DEG C-580 DEG C, then be warming up to pre-burning 2-3 hour under the condition of 860 DEG C-920 DEG C, obtain Preburning material;
(3) ball milling, pressed compact: Preburning material is put into sand mill, add the 0.6-1.0wt% polyvinyl alcohol that is equivalent to prepare burden, 1.0-1.2wt% disperse materials, appropriate amount of deionized water to carry out sand milling 90-120 minute simultaneously, obtain slurry, and dry; The powder of oven dry is added to the polyvinyl alcohol of 1.2-1.8wt%, the zinc stearate of 0.2-0.4wt%, and granulation, packs mould into, under 75-85Mpa pressure, is pressed into blank, naturally dries;
(4) double sintering: magnetic core blank is put into nitrogen atmosphere protection pushed bat kiln sintering, first rise to 540-580 DEG C with the heating rate of 130-150 DEG C/h; Sintering 1-2 hour; Adjust again oxygen content 1.0%-1.2% in blanket of nitrogen, by 840-870 DEG C, be incubated 2-3 hour with the heating rate of 100-120 DEG C/h; Adjusting oxygen content in nitrogen atmosphere is 0.3%-0.5% again, rises to 1390-1440 DEG C, heat preservation sintering 4-5 hour with the heating rate of 180-190 DEG C/h; Then cooling, adjusts oxygen content 1.4%-1.6%, is cooled to 680-710 DEG C with the rate of temperature fall of 120-140 DEG C/h, insulation 1-2 hour, then be cooled to room temperature with the rate of temperature fall of 180-220 DEG C/h;
Disperse materials described in step (3) is made by the raw material of following weight portion: polyvinyl alcohol 3-4, zinc stearate 2-3, Bi
2o
30.2-0.3, aminopropyl triethoxysilane 0.5-0.8, aluminium nitride 1-1.3, Nb
2o
50.3-0.5, barium sulfate 1.2-1.4, petroleum sodium sulfonate 0.6-0.9;
Preparation method is: by each mixing of materials, grinding distribution evenly.
The present invention has the characteristic of high frequency, high magnetic permeability, high Bs, high TC.
embodiment
A kind of Ni-Zn soft magnetic ferrite material, principal component counts by molar and comprises: 12molNiO, 32.5mol Fe
3o
4, 12.5molZnO, 5.2mol V
2o
5, 0.3mol WO
3, the modification impurity adding in principal component comprises according to the weighing scale that accounts for described Ni-Zn soft magnetic ferrite material: 480ppm HfO
2, 330ppm chromium boride, 280ppm molybdenum bisuphide, 120ppmTi
2o3,520ppm PtO
2;
The preparation method of Ni-Zn soft magnetic ferrite material, comprises the following steps:
(1) batching: principal component is prepared burden, and add modification impurity;
(2) once sintered: batching is blended in pre-burning 1-2 hour under the condition of 540 DEG C-580 DEG C, then be warming up to pre-burning 2-3 hour under the condition of 860 DEG C-920 DEG C, obtain Preburning material;
(3) ball milling, pressed compact: Preburning material is put into sand mill, add the 0.6-1.0wt% polyvinyl alcohol that is equivalent to prepare burden, 1.0-1.2wt% disperse materials, appropriate amount of deionized water to carry out sand milling 90-120 minute simultaneously, obtain slurry, and dry; The powder of oven dry is added to the polyvinyl alcohol of 1.2-1.8wt%, the zinc stearate of 0.2-0.4wt%, and granulation, packs mould into, under 75-85Mpa pressure, is pressed into blank, naturally dries;
(4) double sintering: magnetic core blank is put into nitrogen atmosphere protection pushed bat kiln sintering, first rise to 540-580 DEG C with the heating rate of 130-150 DEG C/h; Sintering 1-2 hour; Adjust again oxygen content 1.0%-1.2% in blanket of nitrogen, by 840-870 DEG C, be incubated 2-3 hour with the heating rate of 100-120 DEG C/h; Adjusting oxygen content in nitrogen atmosphere is 0.3%-0.5% again, rises to 1390-1440 DEG C, heat preservation sintering 4-5 hour with the heating rate of 180-190 DEG C/h; Then cooling, adjusts oxygen content 1.4%-1.6%, is cooled to 680-710 DEG C with the rate of temperature fall of 120-140 DEG C/h, insulation 1-2 hour, then be cooled to room temperature with the rate of temperature fall of 180-220 DEG C/h;
Disperse materials described in step (3) by following weight portion (kilogram) raw material make: polyvinyl alcohol 4, zinc stearate 3, Bi
2o
30.3, aminopropyl triethoxysilane 0.8, aluminium nitride 1, Nb
2o
50.5, barium sulfate 1.4, petroleum sodium sulfonate 0.9;
Preparation method is: by each mixing of materials, grinding distribution evenly.
The performance data of the magnetic ferrite magnetic core making by above-described embodiment:
Sequence number | Technical indicator title | Technical indicator | Remarks |
1 | Initial permeability (25 ± 3 DEG C) | 7300±25% | ? |
2 | Power loss (100Kc, 200mT) unit: KW/m 3 | 663(25±2℃), 345(100±2℃) | ? |
3 | Saturation flux density mT(100 DEG C) | 465 | ? |
4 | Curie temperature DEG C | >260 | ? |
Claims (1)
1. a Ni-Zn soft magnetic ferrite material, is characterized in that, principal component counts by molar and comprises: 11.5-12molNiO, 32-32.5mol Fe
3o
4, 12-12.5molZnO, 5.2-5.5mol V
2o
5, 0.2-0.3mol WO
3, the modification impurity adding in principal component comprises according to the weighing scale that accounts for described Ni-Zn soft magnetic ferrite material: 460-480ppm HfO
2, 310-330ppm chromium boride, 250-280ppm molybdenum bisuphide, 80-120ppmTi
2o
3, 480-520ppm PtO
2;
The preparation method of described Ni-Zn soft magnetic ferrite material, is characterized in that comprising the following steps:
(1) batching: principal component is prepared burden, and add modification impurity;
(2) once sintered: batching is blended in pre-burning 1-2 hour under the condition of 540 DEG C-580 DEG C, then be warming up to pre-burning 2-3 hour under the condition of 860 DEG C-920 DEG C, obtain Preburning material;
(3) ball milling, pressed compact: Preburning material is put into sand mill, add the 0.6-1.0wt% polyvinyl alcohol that is equivalent to prepare burden, 1.0-1.2wt% disperse materials, appropriate amount of deionized water to carry out sand milling 90-120 minute simultaneously, obtain slurry, and dry; The powder of oven dry is added to the polyvinyl alcohol of 1.2-1.8wt%, the zinc stearate of 0.2-0.4wt%, and granulation, packs mould into, under 75-85MPa pressure, is pressed into blank, naturally dries;
(4) double sintering: magnetic core blank is put into nitrogen atmosphere protection pushed bat kiln sintering, first rise to 540-580 DEG C with the heating rate of 130-150 DEG C/h; Sintering 1-2 hour; Adjust again oxygen content 1.0%-1.2% in blanket of nitrogen, by 840-870 DEG C, be incubated 2-3 hour with the heating rate of 100-120 DEG C/h; Adjusting oxygen content in nitrogen atmosphere is 0.3%-0.5% again, rises to 1390-1440 DEG C, heat preservation sintering 4-5 hour with the heating rate of 180-190 DEG C/h; Then cooling, adjusts oxygen content 1.4%-1.6%, is cooled to 680-710 DEG C with the rate of temperature fall of 120-140 DEG C/h, insulation 1-2 hour, then be cooled to room temperature with the rate of temperature fall of 180-220 DEG C/h;
Disperse materials described in step (3) is made by the raw material of following weight portion: polyvinyl alcohol 3-4, zinc stearate 2-3, Bi
2o
30.2-0.3, aminopropyl triethoxysilane 0.5-0.8, aluminium nitride 1-1.3, Nb
2o
50.3-0.5, barium sulfate 1.2-1.4, petroleum sodium sulfonate 0.6-0.9;
Preparation method is: by each mixing of materials, grinding distribution evenly.
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CN105084882A (en) * | 2015-07-24 | 2015-11-25 | 天长市中德电子有限公司 | High-magnetic-permeability low-loss soft-magnetic ferrite material and preparation method |
CN108711481B (en) * | 2018-07-11 | 2020-06-05 | 横店集团东磁股份有限公司 | MnZn ferrite magnetic sheet and preparation method and application thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1420101A (en) * | 2002-07-05 | 2003-05-28 | 邓廷成 | High-conductive nickel-zinc ferrite and preparing process thereof |
CN1929048A (en) * | 2006-09-05 | 2007-03-14 | 电子科技大学 | NiZn soft magnetic ferrite material with high magnetic conductivity and high Curie temperature and its preparing method |
CN101106000A (en) * | 2006-07-13 | 2008-01-16 | 天通控股股份有限公司 | Nickel zinc ferrite low temperature high density production method and its product |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1420101A (en) * | 2002-07-05 | 2003-05-28 | 邓廷成 | High-conductive nickel-zinc ferrite and preparing process thereof |
CN101106000A (en) * | 2006-07-13 | 2008-01-16 | 天通控股股份有限公司 | Nickel zinc ferrite low temperature high density production method and its product |
CN1929048A (en) * | 2006-09-05 | 2007-03-14 | 电子科技大学 | NiZn soft magnetic ferrite material with high magnetic conductivity and high Curie temperature and its preparing method |
Non-Patent Citations (2)
Title |
---|
葛慧琳.高性能掺杂Ni-Zn铁氧体材料制备与表征.《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》.2010,(第8期), * |
高性能掺杂Ni-Zn铁氧体材料制备与表征;葛慧琳;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20100831(第8期);正文第16,18页 * |
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