JPH0346521B2 - - Google Patents
Info
- Publication number
- JPH0346521B2 JPH0346521B2 JP58145092A JP14509283A JPH0346521B2 JP H0346521 B2 JPH0346521 B2 JP H0346521B2 JP 58145092 A JP58145092 A JP 58145092A JP 14509283 A JP14509283 A JP 14509283A JP H0346521 B2 JPH0346521 B2 JP H0346521B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic
- water
- molding
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- -1 Iron-silicon-aluminum Chemical compound 0.000 claims description 5
- 229910002796 Si–Al Inorganic materials 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 230000035699 permeability Effects 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 229910000889 permalloy Inorganic materials 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 1
- 229940063655 aluminum stearate Drugs 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
Description
【発明の詳細な説明】
本発明は、鉄（Fe），珪素（Si），アルミ（Al）
を主成分とする鉄−珪素−アルミ磁性合金を原料
とした圧粉磁心の製造方法に関するものである。[Detailed description of the invention] The present invention is based on iron (Fe), silicon (Si), aluminum (Al).
The present invention relates to a method for manufacturing a powder magnetic core using an iron-silicon-aluminum magnetic alloy as a raw material.
Fe−Si−Al磁性合金は既に公知であり、重量
でSi4〜13％、Al4〜７％、残鉄の組成のものが
透磁率が最も大きくなることが知られている。 Fe--Si--Al magnetic alloys are already known, and it is known that those with a composition of 4 to 13% Si, 4 to 7% Al, and balance iron have the highest magnetic permeability.
従来、Fe−Si−Al磁性合金で構成した圧粉磁
心は、インダクタンス素子として装荷線輪や高周
波磁心に用いられている。しかしながら、高性能
な磁気特性を有するフエライトの出現によつて、
装荷線輪、LCフイルタ用チヨークコイルはフエ
ライトに置き換えられ、また電源用チヨークコイ
ル等にはMo−Ni−Feを主成分とするモリブデン
パーマロイ圧粉磁心やフエライトが用いられ、現
在では、Fe−Si−Al系磁性合金の圧粉磁心はほ
とんど用いられなくなつている。 Conventionally, powder magnetic cores made of Fe--Si--Al magnetic alloys have been used as inductance elements in loaded coils and high-frequency magnetic cores. However, with the advent of ferrite with high performance magnetic properties,
Chiyoke coils for loading coils and LC filters have been replaced with ferrite, and molybdenum permalloy dust cores and ferrite whose main component is Mo-Ni-Fe are used for power supply chiyoke coils, etc. Currently, Fe-Si-Al Powder magnetic cores made of magnetic alloys are almost no longer used.
この理由は、Fe−Si−Al系磁性合金は透磁率
が80（10kHz）、電力損失が750kW／m3（25kHz，
2000G）であり、モリブデンパーマロイ圧粉磁心
の透磁率125（10kHz）、電力損失550kW／m3（25k
Hz，2000G）に比して磁気特性が悪いことによ
る。 The reason for this is that the Fe-Si-Al magnetic alloy has a magnetic permeability of 80 (10kHz) and a power loss of 750kW/ m3 (25kHz,
2000G), the permeability of the molybdenum permalloy dust core is 125 (10kHz), and the power loss is 550kW/ m3 (25k
Hz, 2000G) due to poor magnetic properties.
一方で、モリブデンパーマロイの原料であるモ
リブデンやパーマロイの価格が高いので、合金自
身が高価となる欠点があるが、Fe−Si−Alは逆
に廉価である。 On the other hand, since molybdenum and permalloy, which are the raw materials for molybdenum permalloy, are expensive, the alloy itself has the disadvantage of being expensive, but Fe-Si-Al, on the other hand, is inexpensive.
従つて、本発明は廉価なFe−Si−Al系磁性合
金からなり、磁気特性を改善した圧粉磁心を製造
する方法を提供することを目的とする。 Therefore, an object of the present invention is to provide a method for producing a dust core made of an inexpensive Fe-Si-Al magnetic alloy and having improved magnetic properties.
Fe−Si−Al系圧粉磁心を電源用チヨークコイ
ルの磁心として供するには、透磁率が大きいこと
（μが100以上）、電力損失PLが小さいことが必要
である。 In order to use the Fe-Si-Al powder magnetic core as the magnetic core of a power source chiyoke coil, it is necessary that the magnetic permeability is large (μ is 100 or more) and the power loss PL is small.
ところで、Fe−Si−Al系圧粉磁心は、溶解し
て得た合金を粉砕して粉末とし、プレス成型して
得ているが、μの大きいものを得るためには密度
を大きくしなければならないので、従来では、プ
レス成型時の圧力を高くしていた。しかしながら
Fe−Si−Al系圧粉磁心のプレス成型圧力は同じ
磁性のフエライト粉をプレス成型する圧力に比し
１ケタ以上大きいことが必要であり、成型用金型
の選択特にそのコスト及び寿命に問題がある。そ
れ故成型圧力をできるだけ小さくして所望の密度
を得て高いμを得る技術が要求された。 By the way, Fe-Si-Al powder magnetic cores are obtained by crushing a melted alloy into powder and press-molding it, but in order to obtain a large μ, the density must be increased. Therefore, in the past, the pressure during press molding was increased. however
The press-molding pressure of the Fe-Si-Al powder magnetic core needs to be at least one order of magnitude higher than the pressure for press-molding ferrite powder of the same magnetic properties, which poses problems in the selection of the molding die, especially its cost and lifespan. There is. Therefore, there was a need for a technique to obtain the desired density and high μ by reducing the molding pressure as much as possible.
一方、粉末の成型には潤滑剤を混合して、プレ
ス成型性を改善する手段は知られている。そこ
で、本発明者は例えば（）ステアリン酸、（）
ステアリン酸カルシウム、（）ステアリン酸亜
鉛、（）ステアリン酸アルミニウム潤滑剤とし
てFe−Si−Al系粉末に混合して種々検討を重ね
たが、（）〜（）では成型体にヒビ、割れが
発生して歩留が悪く、（）では成型性が多少改
善されるものの、μの向上にはならなかつた。 On the other hand, it is known that a lubricant is mixed into powder molding to improve press moldability. Therefore, the present inventors, for example, () stearic acid, ()
Calcium stearate, () zinc stearate, () aluminum stearate We have repeatedly investigated various ways of mixing them with Fe-Si-Al powder as lubricants, but with () to (), cracks and cracks occurred in the molded products. The yield was poor, and although moldability was somewhat improved in (), it did not result in an improvement in μ.
そこで、本発明者はさらに鋭意研究した結果、
Fe−Si−Al系の合金粉末成型においては、合金
粉末に水を添加するとプレス成型性が改善され、
高いμの圧粉磁心が得られることを発見した。 Therefore, as a result of further intensive research, the present inventor found that
In Fe-Si-Al alloy powder forming, adding water to the alloy powder improves press formability.
It was discovered that a powder magnetic core with a high μ can be obtained.
本発明は、このような発見にもとづくものであ
る。 The present invention is based on such a discovery.
本発明は、鉄−珪素−アルミを主成分とする磁
性合金の粉末に、水ガラスと、１〜5wt％の水分
とを添加した後、成形することを特徴とする鉄−
珪素−アルミ系磁性合金圧粉磁心の製造方法であ
る。 The present invention is characterized by adding water glass and 1 to 5 wt% water to powder of a magnetic alloy mainly composed of iron, silicon, and aluminum, and then molding the powder.
This is a method for manufacturing a silicon-aluminum magnetic alloy dust core.
水ガラスには、通常10〜30wt％の水分を含ん
でいるが、水ガラスそのものはアメ状をしてお
り、センダスト粉末と混合するときにタマにな
り、混合性が悪い。磁性合金の粉末および水ガラ
スに、1wt％以上の水分を添加すると混合性は良
くなるが、この水分添加量が5wt％を越えると粉
がベタつき実用的でない。 Water glass usually contains 10 to 30 wt% of water, but the water glass itself has a candy-like appearance and forms lumps when mixed with sendust powder, resulting in poor mixing properties. Adding 1wt% or more of water to the magnetic alloy powder and water glass improves the mixability, but if the amount of water added exceeds 5wt%, the powder becomes sticky and is not practical.
以下、本発明の実施例を図面を参照して詳細に
説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Si9.5％，Al5.5％，残鉄の磁性合金粉末に、バ
インダーとして水ガラス（硅酸ソーダー
JISK14083号）を0.5％添加混合後、水分の添加
量をかえた粉末（水分含）を作製し、各粉末をプ
レス成形後750℃で水素中焼成した。得られた圧
粉磁心の密度および磁気特性を測定した。その結
果を第１図に示す。図中曲線ａ，ｂ，ｃ，ｄは添
加水分量がそれぞれ0.15％，3.0％，4.5％のもの
である。 Magnetic alloy powder of 9.5% Si, 5.5% Al, and residual iron is mixed with water glass (sodium silicate) as a binder.
After adding and mixing 0.5% of JISK14083), powders (containing water) with different amounts of water added were prepared, and each powder was press-molded and fired in hydrogen at 750°C. The density and magnetic properties of the obtained dust core were measured. The results are shown in FIG. Curves a, b, c, and d in the figure are for added water contents of 0.15%, 3.0%, and 4.5%, respectively.
この結果からわかるように、粉末の添加水分量
が増加すると、透磁率、電力損失、磁束密度が大
幅に向上する。これは、第１図ｄに示されるよう
に、添加水分量が増加するにしたがつて同一成形
圧力で得られる密度が高くなつていることによ
る。また、第２図に、添加水分量とプレス成形体
強度（圧縮試験による強度）の関係を示した。水
分を混合することにより低い圧力でも成型が可能
であり、また添加水分量が増加するにしたがい成
形体の強度が向上し搬送時のカケ、ワレが少なく
なり量産製造時成形体の取り扱いが容易になる。 As can be seen from these results, as the amount of water added to the powder increases, the magnetic permeability, power loss, and magnetic flux density significantly improve. This is because, as shown in FIG. 1d, as the amount of added water increases, the density obtained at the same molding pressure increases. Furthermore, FIG. 2 shows the relationship between the amount of added water and the strength of the press-formed product (strength determined by compression test). By mixing water, molding is possible even at low pressure, and as the amount of added water increases, the strength of the molded product improves, reducing chipping and cracking during transportation, making it easier to handle the molded product during mass production. Become.
粉末に対する水分の添加量は10wt％でも可能
であるが、5wt％を越えると、粉末がベタつき粉
末作製の作業性があるいはプレス作業性に難点が
あり、水分の添加量は5wt％以下（０を含まず）
が有効と言える。なお、ここで、添加水分量は、
バインダーとして添加される水ガラス中の水分は
含まないものとする。 Although it is possible to add water to the powder at an amount of 10 wt%, if it exceeds 5 wt%, the powder becomes sticky and there are problems with the workability of powder production or press work. not included)
can be said to be effective. In addition, here, the amount of added water is
The water in the water glass added as a binder is not included.
以上述べた如く本発明によれば、鉄−珪素−ア
ルミ系磁性合金あるいはそれらと添加元素が含ま
れる磁性合金粉末に水ガラスと、5wt％以下の水
分とを添加することにより、成形体の取り扱いが
容易で磁気特性の良好な鉄−珪素−アルミ系磁性
合金圧粉磁心を低廉に提供しえる。 As described above, according to the present invention, by adding water glass and water of 5 wt% or less to an iron-silicon-aluminum magnetic alloy or a magnetic alloy powder containing them and an additive element, the molded body can be handled easily. It is possible to provide an iron-silicon-aluminum magnetic alloy dust core having good magnetic properties at a low cost.
第１図ａ〜ｄは、本発明により、種々の添加水
分における成形圧力と、透磁率、重力損失、磁束
密度、および密度との関係をそれぞれ示すグラ
フ、第２図は本発明による磁心の水分添加量と成
形体強度との関係を示すグラフである。
FIGS. 1 a to d are graphs showing the relationship between molding pressure, magnetic permeability, gravitational loss, magnetic flux density, and density at various added moisture levels according to the present invention, and FIG. It is a graph showing the relationship between the addition amount and the strength of the molded body.
Claims (1)
粉末に、水ガラスと、１〜5wt％の水分とを添加
した後、成形することを特徴とする鉄−珪素−ア
ルミ系磁性合金圧粉磁心の製造方法。1. Iron-silicon-aluminum magnetic alloy powder, which is characterized by adding water glass and 1 to 5 wt% of water to powder of a magnetic alloy mainly composed of iron-silicon-aluminum, and then molding the powder. Manufacturing method of magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14509283A JPS6039135A (en) | 1983-08-10 | 1983-08-10 | Manufacture of dust core of magnetic iron-silicon- aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14509283A JPS6039135A (en) | 1983-08-10 | 1983-08-10 | Manufacture of dust core of magnetic iron-silicon- aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6039135A JPS6039135A (en) | 1985-02-28 |
| JPH0346521B2 true JPH0346521B2 (en) | 1991-07-16 |
Family
ID=15377190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14509283A Granted JPS6039135A (en) | 1983-08-10 | 1983-08-10 | Manufacture of dust core of magnetic iron-silicon- aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6039135A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196302A (en) * | 1986-02-21 | 1987-08-29 | Nippon Mining Co Ltd | Press molding method for high-purity tungsten powder |
| JP2713362B2 (en) * | 1986-11-28 | 1998-02-16 | 日立金属株式会社 | Fe-Si-A1 alloy powder core |
| JP2654944B2 (en) * | 1987-01-16 | 1997-09-17 | 株式会社トーキン | Composite dust core material and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4845472A (en) * | 1971-10-13 | 1973-06-29 |
-
1983
- 1983-08-10 JP JP14509283A patent/JPS6039135A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4845472A (en) * | 1971-10-13 | 1973-06-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6039135A (en) | 1985-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |