CN110838399A - Preparation method of soft magnetic ferrite powder and preparation method of laminated inductor - Google Patents
Preparation method of soft magnetic ferrite powder and preparation method of laminated inductor Download PDFInfo
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- CN110838399A CN110838399A CN201810965616.0A CN201810965616A CN110838399A CN 110838399 A CN110838399 A CN 110838399A CN 201810965616 A CN201810965616 A CN 201810965616A CN 110838399 A CN110838399 A CN 110838399A
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- Prior art keywords
- ferrite powder
- organic compound
- ions
- soft magnetic
- slurry
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title description 7
- 239000002002 slurry Substances 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000006259 organic additive Substances 0.000 claims abstract description 19
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 11
- 229910002535 CuZn Inorganic materials 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 8
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 7
- -1 hydroxymethylcarbonyl group Chemical group 0.000 claims abstract description 7
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 7
- 239000011701 zinc Substances 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000002596 lactones Chemical class 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims abstract description 3
- 150000002500 ions Chemical class 0.000 claims description 14
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 230000005291 magnetic effect Effects 0.000 claims description 3
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000174 gluconic acid Substances 0.000 claims description 2
- 235000012208 gluconic acid Nutrition 0.000 claims description 2
- 229910018054 Ni-Cu Inorganic materials 0.000 claims 1
- 229910018481 Ni—Cu Inorganic materials 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001252 Pd alloy Inorganic materials 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000007582 slurry-cast process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
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
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Magnetic Ceramics (AREA)
Abstract
The present invention provides a method for preparing a Ni-CuZn ferrite powder having excellent sinterability at a relatively low temperature and a method for preparing a laminated chip inductor from the ferrite powder. The ferrite powder is prepared by a process for preparing a soft magnetic ferrite powder having iron, nickel, copper and zinc as main components, comprising the step of presenting an organic additive in a slurry containing a starting powder and a calcined product of WAT. ER, wherein the organic additive is an organic compound having a hydroxyl group and a carboxyl group or a neutralized salt thereof or a lactone, or the organic additive is an organic compound having a hydroxymethylcarbonyl group, having an enol-type hydroxyl-decomposable organic compound. S is an acid or a salt thereof.
Description
Technical Field
The invention relates to a preparation method of soft magnetic ferrite powder capable of being sintered at low temperature, in particular to a preparation method of soft magnetic ferrite powder and a preparation method of a laminated chip inductor.
Background
In recent years, the technology of electronic machines and devices in terms of size and weight is being remarkably developed, and various devices are also rapidly adapted to surface mounting accordingly. As an inductance device, a so-called chip inductor formed by integrating a magnetic material and a coil is used in many cases, and it is desired to improve its performance. For the chip inductor, Ni — CuZn ferrite as a magnetic material is generally used as the magnetic material, and Ag or Ag palladium alloy is used as a conductive material of the coil. In the production of the chip inductor, first, starting compounds containing Fe, Ni, Cu and Zn are mixed separately, for example, with a ball mill, and then the mixture is calcined, and the product is calcined to obtain a soft magnetic ferrite powder. And kneading the soft magnetic ferrite powder, a binder and a solvent together to obtain the magnetic material slurry. Further, the conductive material powder is kneaded together with a binder and a solvent to obtain a conductive material slurry. Then, these pastes are repeatedly printed to laminate a magnetic material layer and a conductive material layer, and then the prepared laminate is sintered to form external electrodes, thereby obtaining a chip inductor. When the Ni — CuZn ferrite powder is sintered at 920 ℃ or less, the densification of ferrite does not proceed well, and thus it is difficult to obtain a ferromagnetic sintered body excellent in electrical properties such as magnetic permeability.
Disclosure of Invention
The present invention has been made to overcome the above-mentioned disadvantages of the prior art and provides a method for preparing a soft magnetic ferrite powder and a method for preparing a laminated chip inductor, which achieve high performance without causing any reaction between a conductive material and ferrite and any wire breakage.
The technical scheme of the invention is as follows: comprising mixing an organic additive with water, calcining the product comprising Ni-CuZn ferrite to form a slurry, drying the slurry, and preparing a soft magnetic ferrite powder comprising iron, nickel, copper and zinc as a main component. The organic additive is an organic compound having a hydroxyl group and a carboxyl group or a neutralized salt thereof or a lactone, or the organic additive is an organic compound having a hydroxymethylcarbonyl group, an organic compound having an enol-type hydroxy DIS. The slurry contains Fe ions and Cu ions derived from the calcined product and has a total content of Fe ions and Cu ions of 0.005 to 2% by weight based on the calcined product; the slurry contains 0.05 to 3% by weight of an organic additive based on the calcined product; the organic compound having a hydroxyl group and a carboxyl group is gluconic acid or citric acid.
The slurry contains ammonia.
A method of manufacturing a laminated chip inductor includes mixing an organic additive with water, and calcining a product including Ni-CuZn ferrite to form a slurry; drying the slurry to produce a soft magnetic ferrite powder including iron, nickel, copper, and zinc as main components; the magnetic layer is formed from a soft magnetic ferrite powder, wherein the organic additive is an organic compound having a hydroxyl group and a carboxyl group or a neutralized salt thereof or a lactone, or the organic additive is an organic compound having a hydroxymethylcarbonyl group. An organic compound having an enol-type hydroxyl group, which can be dissociated into an acid or a neutralized salt thereof; the slurry contains iron ions and Cu ions derived from the calcined product and has a total content of Fe ions and Cu ions of 0.005 to 2% by weight based on the calcined product.
The invention has the beneficial effects that: capable of preparing Ni-CuZn ferrite powder having excellent sinterability at low temperatures, and a method of preparing a laminated chip inductor. In which the ferrite powder is used, so that it can be fired at a low temperature to produce a multilayer chip inductor.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In fig. 1, in the present invention, ammonia may be added to the slurry in addition to the organic additive. Organic additives used in the present invention, such as tartaric acid, 1-ascorbic acid and citric acid, are called dispersants, and are used to improve the slurry casting molding method. In the present invention, sintering can be performed without depending on the ferrite component to form a dense sintered body at a low temperature. Therefore, the amount ratio of the components of the Ni-CuZn ferrite to which the present invention is applied is not particularly limited. The above amount ratio may be appropriately determined within a general composition range depending on the desired properties. Fe2O3, NiO, CuO and ZnO which take oxides as main components, the general weight ratio of the components is as follows: 35-50 mol% of Fe2O3, 4-50 mol% of NiO, CuO: 4-16 mol% and ZnO: 5-40 mol%. The present invention can be applied not only to a high permeability material having a large content of Fe2O3 but also to a low permeability material having a small content of Fe2O 3. The reason for limiting the oxide content as a main component is as follows. When the amount of Fe2O3 is too small, the formation of a nonmagnetic phase increases, resulting in an increase in loss. When the amount of Fe2O3 is too large, the sinterability is extremely poor. When the amount of NiO is too small, loss increases, and when the amount of NiO is too large, ferrite is expensive. When the amount of CuO is too small, sinterability is poor, and when the amount of CuO is too large, the amount of NiO is relatively small, and thus loss increases. When the amount of ZnO is too small, the permeability is low, and when the amount of ZnO is too large, the curie temperature is too low. First, a calcined product of the starting powder is prepared. As the starting powder, various raw materials generally used for producing Ni — CuZn ferrite, such as oxides or various compounds, which form oxides upon combustion, can be used. Preferably, the calcination is carried out in an oxidizing atmosphere, and in general, the calcination temperature (temperature to be maintained) is generally 700 to 900 ℃ and the calcination time (time period for maintaining the temperature) is generally 0.5 to 10 hours in air. The prepared calcined product was mixed with water to obtain a slurry for pulverization. The pulverized slurry is wet-pulverized until the calcined product has a predetermined particle size or specific surface area, and then the slurry is dried to obtain a soft magnetic ferrite powder.
Claims (3)
1. A method for preparing soft magnetic ferrite powder and a method for preparing a laminated chip inductor are characterized in that: comprises mixing an organic additive with water, calcining the resultant including Ni-Cu, Zn ferrite to form a slurry, drying the slurry, and preparing a soft magnetic ferrite powder including iron, nickel, copper and zinc as a main component. The organic additive is an organic compound having a hydroxyl group and a carboxyl group or a neutralized salt thereof or a lactone, or the organic additive is an organic compound having a hydroxymethylcarbonyl group, an organic compound having an enol-type hydroxy DIS. The slurry contains Fe ions and Cu ions derived from the calcined product and has a total content of Fe ions and Cu ions of 0.005 to 2% by weight based on the calcined product; the slurry contains 0.05 to 3% by weight of an organic additive based on the calcined product; the organic compound having a hydroxyl group and a carboxyl group is gluconic acid or citric acid.
2. The method for preparing soft magnetic ferrite powder and the laminated chip inductor as claimed in claim, wherein: the slurry contains ammonia.
3. A method of making a laminated chip inductor, comprising: comprising mixing an organic additive with water, the calcination product comprising Ni-CuZn ferrite to form a slurry; drying the slurry to produce a soft magnetic ferrite powder including iron, nickel, copper, and zinc as main components; the magnetic layer is formed from a soft magnetic ferrite powder, wherein the organic additive is an organic compound having a hydroxyl group and a carboxyl group or a neutralized salt thereof or a lactone, or the organic additive is an organic compound having a hydroxymethylcarbonyl group. An organic compound having an enol-type hydroxyl group, which can be dissociated into an acid or a neutralized salt thereof; the slurry contains iron ions and Cu ions derived from the calcined product and has a total content of Fe ions and Cu ions of 0.005 to 2% by weight based on the calcined product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965616.0A CN110838399A (en) | 2018-08-17 | 2018-08-17 | Preparation method of soft magnetic ferrite powder and preparation method of laminated inductor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965616.0A CN110838399A (en) | 2018-08-17 | 2018-08-17 | Preparation method of soft magnetic ferrite powder and preparation method of laminated inductor |
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| Publication Number | Publication Date |
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| CN110838399A true CN110838399A (en) | 2020-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810965616.0A Pending CN110838399A (en) | 2018-08-17 | 2018-08-17 | Preparation method of soft magnetic ferrite powder and preparation method of laminated inductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116040695A (en) * | 2022-12-29 | 2023-05-02 | 国网智能电网研究院有限公司 | Lamellar nickel-copper-zinc ferrite nano material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268755A (en) * | 1999-03-09 | 2000-10-04 | Tdk株式会社 | Method for producing soft magnetic ferrite powder, and method for making laminated chip inducer |
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2018
- 2018-08-17 CN CN201810965616.0A patent/CN110838399A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268755A (en) * | 1999-03-09 | 2000-10-04 | Tdk株式会社 | Method for producing soft magnetic ferrite powder, and method for making laminated chip inducer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116040695A (en) * | 2022-12-29 | 2023-05-02 | 国网智能电网研究院有限公司 | Lamellar nickel-copper-zinc ferrite nano material and preparation method thereof |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200225 |
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