JPH08124735A - Magnetic paste - Google Patents
Magnetic pasteInfo
- Publication number
- JPH08124735A JPH08124735A JP28591594A JP28591594A JPH08124735A JP H08124735 A JPH08124735 A JP H08124735A JP 28591594 A JP28591594 A JP 28591594A JP 28591594 A JP28591594 A JP 28591594A JP H08124735 A JPH08124735 A JP H08124735A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic paste
- binder
- paste
- glycidyl ether
- 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.)
- Pending
Links
Classifications
-
- 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
- H01F41/14—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 applying magnetic films to substrates
- H01F41/16—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 applying magnetic films to substrates the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種電子部品等に用い
られるフェライト焼結体同士を接合するときに生じるギ
ャップに充填する磁性ペーストに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic paste for filling a gap generated when joining ferrite sintered bodies used in various electronic parts and the like.
【０００２】[0002]
【従来の技術】インダクタンス素子はトロイダル形状に
代表される閉磁路型のコアに巻線を施したタイプが主流
であるが、このタイプは巻線工程が煩雑であり、高速で
巻線をすることが困難なため、量産性に優れたものでは
なかった。2. Description of the Related Art An inductance element is mainly a type in which a closed magnetic circuit type core represented by a toroidal shape is wound, but this type has a complicated winding process and requires high-speed winding. However, it was not excellent in mass productivity.
【０００３】近年、量産性の向上及びそれに伴う低コス
ト化を実現するため、Ｕ型及びＥ型コアなどの開磁路型
のコアに巻線を施したものに、Ｕ型、Ｅ型及びＩ型コア
などを接合し閉磁路化するという方法が用いられ始めて
いる。この方法を用いることにより、コアの一方向は開
放されるため巻線の工程は平易になり、量産性を大幅に
向上することが可能となる。In recent years, in order to improve the mass productivity and to reduce the cost associated therewith, U-shaped, E-shaped, and I-shaped cores, such as U-shaped and E-shaped cores, which are wound, A method of joining a mold core and the like to form a closed magnetic circuit is beginning to be used. By using this method, one direction of the core is opened, so that the winding process is simplified and mass productivity can be greatly improved.
【０００４】ただし、この方法ではコア同士を接合させ
る際にギャップが生じるため、閉磁路型のコアを用いた
場合に比べ磁気特性が劣化してしまうという問題があっ
た。この問題を解決するため、２つのフェライト焼結体
同士を接合させる場合に生じるギャップに、フェライト
粉末、結合剤等を混練分散することにより得られる磁性
ペーストを充填し、２つのコアを接着することが提案さ
れている。However, this method has a problem that the magnetic characteristics are deteriorated as compared with the case where the closed magnetic circuit type core is used because a gap is generated when the cores are joined together. In order to solve this problem, a magnetic paste obtained by kneading and dispersing ferrite powder, a binder, etc., is filled in a gap generated when joining two ferrite sintered bodies, and the two cores are bonded together. Is proposed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、該磁性
ペーストは外力による変形のほとんどないフェライト焼
結体間の接着に用いられることから、ギャップに充填し
た磁性ペーストの収縮が溶剤の揮発によって発生すれ
ば、ギャップを磁性体で完全に充填することはできない
ため、有機溶剤溶解型の結合剤を用いることはできなか
った。However, since the magnetic paste is used for bonding between the ferrite sintered bodies which are hardly deformed by an external force, if the shrinkage of the magnetic paste filled in the gap occurs due to the volatilization of the solvent. Since the gap cannot be completely filled with the magnetic material, the organic solvent-soluble binder cannot be used.
【０００６】そのため熱硬化型の結合剤を使用していた
が、積層型電子部品等の作製に用いられている導体層、
磁性層および誘電体層の形成用ペーストの場合の、有機
溶剤で希釈するような優れた流動性を得る方法はなかっ
た。従って、粉末充填率を上げれば磁性ペーストの流動
性が劣化し、接着性も劣化し、接着時にコアの耐え得る
範囲の荷重を架けただけではコア同士を充分に接近させ
ることができず、逆に粉末充填材がギャップを広げてし
まうために磁気特性が劣化してしまう問題があった。ま
た、ギャップに充填できる流動性を有する磁性ペースト
にした場合、粉末の充填密度を上げることができず、磁
気特性を充分改善することはできないという問題があっ
た。Therefore, although a thermosetting binder was used, a conductor layer used in the production of laminated electronic parts,
In the case of the paste for forming the magnetic layer and the dielectric layer, there was no method for obtaining excellent fluidity such as diluting with an organic solvent. Therefore, if the powder filling rate is increased, the fluidity of the magnetic paste deteriorates and the adhesiveness also deteriorates, and it is not possible to bring the cores close enough by simply applying a load within the range that the cores can withstand during bonding. In addition, there is a problem that the magnetic characteristics are deteriorated because the powder filler widens the gap. Further, when a magnetic paste having fluidity that can fill the gap is used, the packing density of the powder cannot be increased, and the magnetic characteristics cannot be sufficiently improved.
【０００７】本発明は、懸かる従来の欠点を解消し、接
着性・磁気特性にすぐれ、フェライト焼結体同士の接着
に適した優れた流動性を有し、かつ高い充填率を有し、
安価で、高い信頼性を有する磁性ペーストを提供するも
のである。The present invention solves the conventional drawbacks, has excellent adhesiveness and magnetic properties, has excellent fluidity suitable for bonding ferrite sintered bodies to each other, and has a high filling rate.
An inexpensive and highly reliable magnetic paste is provided.
【０００８】[0008]
【課題を解決するための手段】本発明は、フェライト粉
末、熱硬化型結合剤を混練分散処理することにより得ら
れる磁性ペーストの、熱硬化型結合剤の一部をグリシジ
ルエーテル系化合物に置き換えることを特徴とする磁性
ペーストである。According to the present invention, a part of a thermosetting binder of a magnetic paste obtained by kneading and dispersing a ferrite powder and a thermosetting binder is replaced with a glycidyl ether compound. Is a magnetic paste.
【０００９】すなわち本発明は、Ｎｉ，Ｃｕ，Ｚｎ，Ｆ
ｅを主成分とするスピネル系軟磁性フェライト粉末、及
び熱硬化型結合剤を主成分とする組成要素を、混練分散
することにより得られる磁性ペーストにおいて、前記熱
硬化型結合剤の１〜４０wt％をグリシジルエーテル系化
合物に置き換えることを特徴とする磁性ペーストであ
る。That is, according to the present invention, Ni, Cu, Zn, F
In a magnetic paste obtained by kneading and dispersing a spinel soft magnetic ferrite powder containing e as a main component and a composition element containing a thermosetting binder as a main component, 1 to 40 wt% of the thermosetting binder is used. Is a glycidyl ether-based compound, which is a magnetic paste.
【００１０】[0010]
【作用】本発明の効果について次のように考えている。
即ち、グリシジルエーテル系化合物は低分子量のエポキ
シ化合物であるが、フェライト焼結体間のギャップに充
填した後加熱すれば、グリシジルエーテル系化合物は他
の結合剤と一緒に硬化し、結合剤の役割を有するものと
なる。またグリシジルエーテル系化合物は、一般に用い
られているエポキシ樹脂等の熱硬化型結合剤と比べて分
子量が小さく、はるかに低粘度であるため、磁性ペース
トをフェライト焼結体同士の接着に適した流動性にした
ときには、フェライト粉末と結合剤のみを混合した場合
に比べてフェライト粉末の充填率を向上させることがで
きる。したがって、従来の熱硬化型結合剤の一部をグリ
シジルエーテル系化合物で置き換えることより、フェラ
イト焼結体同士の接着に適した優れた流動性を有し、か
つフェライト粉末充填率の高い磁性ペーストを得ること
ができる。The effect of the present invention is considered as follows.
That is, the glycidyl ether-based compound is a low molecular weight epoxy compound, but if the gap between the ferrite sintered bodies is filled and then heated, the glycidyl ether-based compound cures together with other binders, and functions as a binder. Will have. In addition, glycidyl ether compounds have a smaller molecular weight and a much lower viscosity than thermosetting binders such as commonly used epoxy resins, so magnetic paste is suitable for adhesion between ferrite sintered bodies. When it is made to have the property, the filling rate of the ferrite powder can be improved as compared with the case where only the ferrite powder and the binder are mixed. Therefore, by replacing a part of the conventional thermosetting binder with a glycidyl ether-based compound, a magnetic paste having excellent fluidity suitable for bonding ferrite sintered bodies to each other and having a high ferrite powder filling rate can be obtained. Obtainable.
【００１１】ここで、本発明で用いるグリシジルエーテ
ル系化合物としては、低毒性かつ低粘度であることか
ら、モノグリシジルエーテル、ポリグリコールジグリシ
ジルエーテル、３級カルボン酸モノグリシジルエーテル
などが好適である。As the glycidyl ether compound used in the present invention, monoglycidyl ether, polyglycol diglycidyl ether, tertiary carboxylic acid monoglycidyl ether and the like are preferable because of their low toxicity and low viscosity.
【００１２】また、熱硬化型結合剤のグリシジルエーテ
ル系化合物での置換量であるが、１wt％未満ではフェラ
イト粉末の充填率を充分に上げることが出来ないため
に、インダクタンスの回復率向上に効果がなく、４０wt
％を越えた場合には、熱硬化型結合剤およびグリシジル
エーテル系化合物からなる結合剤成分中の熱硬化型結合
剤の量が減少するために接着強度が低下してしまう。The amount of substitution of the glycidyl ether type compound of the thermosetting binder is less than 1 wt%, but the filling rate of the ferrite powder cannot be increased sufficiently, which is effective in improving the recovery rate of the inductance. 40wt without
When it exceeds%, the amount of the thermosetting binder in the binder component composed of the thermosetting binder and the glycidyl ether compound decreases, so that the adhesive strength decreases.
【００１３】[0013]
【実施例】次に本発明を実施例にて詳細に説明する。EXAMPLES The present invention will now be described in detail with reference to Examples.
【００１４】 スピネル系軟磁性フェライト粉末（平均粒径１μｍ） １００重量部 結合剤（エポキシ樹脂） （１００−ｘ）重量部 モノグリシジルエーテル ｘ重量部 を加えスパイラルミキサーにて１時間混練分散したペー
ストに、結合剤（エポキシ樹脂）とモノグリシジルエー
テルを重量比で（１００−ｘ）：ｘに混合したものを加
えていき、一定の粘度（３００ｐ）になるように粘度調
整して磁性ペーストを得た。ただし、ｘ＝０，０.５，
１，５，１０，２０，４０，４５Spinel soft magnetic ferrite powder (average particle size 1 μm) 100 parts by weight Binder (epoxy resin) (100-x) parts by weight Monoglycidyl ether x parts by weight was added to a paste that was kneaded and dispersed for 1 hour in a spiral mixer. Then, a binder (epoxy resin) and monoglycidyl ether were mixed in a weight ratio of (100-x): x, and the viscosity was adjusted to a constant viscosity (300 p) to obtain a magnetic paste. . However, x = 0, 0.5,
1, 5, 10, 20, 40, 45
【００１５】比較例としてスピネル系軟磁性フェライト
粉末を加えず、結合剤であるエポキシ樹脂のみをそのま
ま用いた。As a comparative example, the spinel soft magnetic ferrite powder was not added, and only the epoxy resin as the binder was used as it was.
【００１６】（評価）これらの試料に関し、以下に述べ
る評価を行った。(Evaluation) These samples were evaluated as described below.
【００１７】接着強度 得られた磁性ペーストをディスペンサーを用いて１.５
×２.０×１.５ｍｍ（接合部面積１.５ｍｍ2）のＵ型コ
アの端面に０.１ｇ塗布し、Ｉ型コアを接着して１ｋｇ
ｆの荷重を１０秒間かけた後１２０℃で３分間硬化させ
た試料について、接着面に対し垂直に引っ張ったときの
引っ張り力の測定値から強度を求めた。これはその数値
が大きいほど良いが、コアの強度が２ｋｇｆ（１.３ｋ
ｇｆ／ｍｍ2）程度なのでそれ以上であれば充分であ
り、またそれ以上の測定は出来なかった。Adhesive Strength The magnetic paste obtained was used for 1.5 times with a dispenser.
0.1g was applied on the end surface of a U-shaped core of × 2.0 × 1.5mm (joint area 1.5mm 2 ), and the I-shaped core was adhered to 1kg.
With respect to the sample which was applied with the load f for 10 seconds and then cured at 120 ° C. for 3 minutes, the strength was obtained from the measured value of the tensile force when the sample was pulled perpendicularly to the adhesive surface. The higher the value, the better, but the strength of the core is 2kgf (1.3k).
Since it is about gf / mm 2 ), it is sufficient if it is more than that, and further measurement cannot be performed.
【００１８】インダクタンス回復率 得られた磁性ペーストをディスペンサーを用いて巻線を
施したＵ型コアの端面に０.１ｇ付け、Ｉ型コアを接着
して１ｋｇｆの荷重を１０秒間かけた後１２０℃で３分
間硬化させた試料について、１００ｋＨｚ，１ｍＡのイ
ンダクタンスを、インピーダンス測定機を用いて測定
し、Ｕ型・Ｉ型コアを接着したときのコアと同形状の閉
磁路型ロ字コアの場合のインダクタンスを１００％とし
たときの回復率で示した。インダクタンス回復率も高け
れば高い方がよいが、８０％以上であればインダクタン
ス素子として充分実用化することができる。Inductance recovery rate The obtained magnetic paste was attached to an end surface of a wound U-shaped core by a dispenser in an amount of 0.1 g, an I-shaped core was adhered thereto, a load of 1 kgf was applied for 10 seconds, and then 120 ° C. In the case of a closed magnetic circuit type square-shaped core having the same shape as the core when the U-shaped and I-shaped cores are bonded, the inductance of 100 kHz and 1 mA is measured for the sample cured at The recovery rate is shown when the inductance is 100%. The higher the inductance recovery rate, the better. However, if it is 80% or more, it can be sufficiently put into practical use as an inductance element.
【００１９】図１において、●印でプロットした１は、
磁性ペースト中の結合剤量を示し、○印でプロットした
２は、接着強度を示す。図２において、●印でプロット
した３は、磁性ペースト中のフェライト粉末充填率を示
し、○印でプロットした４は、インダクタンス回復率を
示す。図１の比較例の●印は結合剤量（エポキシ樹脂）
１００wt％の場合を示し、図１の比較例の○印は結合剤
量１００wt％の場合の接着強度を示す。図２の比較例の
○印は、図１の比較例のインダクタンスの回復率を示す
ものである。In FIG. 1, 1 plotted with a black circle is
The amount of the binder in the magnetic paste is shown, and the number 2 plotted with a circle indicates the adhesive strength. In FIG. 2, 3 plotted with a black circle indicates the filling rate of ferrite powder in the magnetic paste, and 4 plotted with a white circle indicates the inductance recovery rate. In the comparative example of FIG. 1, the ● mark indicates the amount of binder (epoxy resin).
The case of 100 wt% is shown, and the mark ◯ of the comparative example in FIG. 1 shows the adhesive strength when the amount of the binder is 100 wt%. 2 indicates the recovery rate of the inductance of the comparative example of FIG.
【００２０】実施例のｘ＝１〜４０wt％では、接着強度
に於いてはｘ＝０wt％及び比較例と遜色なく、またイン
ダクタンス回復率に関してはｘ＝０wt％の場合と比べて
改善されており、実用上充分な値となっている。When x = 1 to 40 wt% in the embodiment, x = 0 wt% in adhesive strength and comparable to the comparative example, and the inductance recovery rate is improved as compared with the case where x = 0 wt%. , Which is a practically sufficient value.
【００２１】一方、実施例のｘ＝０，０.５wt％及び比
較例は、接着強度は充分であるがインダクタンス回復率
は実用に耐えない値となっている。また、実施例のｘ＝
４５wt％では、インダクタンス回復率は充分であるが接
着強度は劣っている。これは実施例のｘ＝１〜４５wt％
では、ｘ＝０.５wt％および比較例と比べてフェライト
粉末の充填率が高いことから、閉磁路型のロ字コアによ
り近づいたためであり、ｘ＝４５wt％でみられる接着強
度の低下は、モノグリシジルエーテルよりも接着力の強
い熱硬化型結合剤（エポキシ樹脂）の量が減ったために
起こったと考えられる。On the other hand, in the case of x = 0.0.5 wt% of the example and the comparative example, the adhesive strength is sufficient, but the inductance recovery rate is a value that cannot be practically used. In addition, x = in the embodiment
At 45 wt%, the inductance recovery rate is sufficient but the adhesive strength is poor. This is x = 1 to 45 wt% of the embodiment
In the case of x = 0.5 wt% and the filling rate of the ferrite powder is higher than that of the comparative example, it is closer to the closed magnetic circuit type square core, and the decrease in the adhesive strength observed at x = 45 wt% is It is considered that this occurred because the amount of the thermosetting binder (epoxy resin) having a stronger adhesive force than that of monoglycidyl ether was reduced.
【００２２】なお、ここではグリシジルエーテル系化合
物としてモノグリシジルエーテルを用いた場合を例にあ
げたが、ポリグリコールジグリシジルエーテル、３級カ
ルボン酸モノグリシジルエーテルなどでも同様の結果が
得られる。Here, the case where monoglycidyl ether was used as the glycidyl ether compound was given as an example, but similar results can be obtained with polyglycol diglycidyl ether, tertiary carboxylic acid monoglycidyl ether and the like.
【００２３】[0023]
【発明の効果】上述から明らかなように、本発明の磁性
ペーストは従来のものと比較して、接着強度は確保さ
れ、インダクタンス回復率も向上している。従って本発
明によれば、流動性がよく、粉末充填率の高い、接着性
・磁気特性に優れた、磁性ペーストを提供することが出
来るので、各種電子部品の低コスト化・高信頼性化への
寄与は大きい。As is apparent from the above, the magnetic paste of the present invention ensures the adhesive strength and improves the inductance recovery rate as compared with the conventional one. Therefore, according to the present invention, since it is possible to provide a magnetic paste having good fluidity, a high powder filling rate, and excellent adhesiveness and magnetic characteristics, it is possible to achieve cost reduction and high reliability of various electronic components. Has a large contribution.
【図１】磁性ペースト中の結合剤中のモノグリシジルエ
ーテルでの置換量に対する接着強度及び磁性ペースト中
の結合剤量の関係を示す図。FIG. 1 is a diagram showing a relationship between an adhesive strength and an amount of a binder in a magnetic paste with respect to a substitution amount of monoglycidyl ether in a binder in a magnetic paste.
【図２】磁性ペースト中の結合剤中のモノグリシジルエ
ーテルでの置換量に対するインダクタンス回復率及びフ
ェライト粉末充填率の関係を示す図。FIG. 2 is a diagram showing a relationship between an inductance recovery rate and a ferrite powder filling rate with respect to a substitution amount of monoglycidyl ether in a binder in a magnetic paste.
１ モノグリシジルエーテルの置換量と磁性ペースト
中の結合剤量の関係を示す曲線 ２ モノグリシジルエーテルの置換量と接着強度の関
係を示す曲線 ３ モノグリシジルエーテルの置換量とフェライト粉
末充填率の関係を示す曲線 ４ モノグリシジルエーテルの置換量とインダクタン
ス回復率の関係を示す曲線1 curve showing the relationship between the amount of monoglycidyl ether substitution and the amount of binder in the magnetic paste 2 curve showing the relationship between monoglycidyl ether substitution and the adhesive strength 3 relationship between monoglycidyl ether substitution and ferrite powder filling rate Shown curve 4 Curve showing the relationship between the substitution amount of monoglycidyl ether and the inductance recovery rate
Claims (1)
スピネル系軟磁性フェライト粉末、及び熱硬化型結合剤
を主成分とする組成要素を、混練分散することにより得
られる磁性ペーストにおいて、前記熱硬化型結合剤の１
〜４０wt％をグリシジルエーテル系化合物に置き換える
ことを特徴とする磁性ペースト。1. A magnetic paste obtained by kneading and dispersing spinel soft magnetic ferrite powder containing Ni, Cu, Zn and Fe as main components and a composition element containing thermosetting binder as main components, One of the thermosetting binders
A magnetic paste characterized in that ˜40 wt% is replaced with a glycidyl ether compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28591594A JPH08124735A (en) | 1994-10-25 | 1994-10-25 | Magnetic paste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28591594A JPH08124735A (en) | 1994-10-25 | 1994-10-25 | Magnetic paste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08124735A true JPH08124735A (en) | 1996-05-17 |
Family
ID=17697668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28591594A Pending JPH08124735A (en) | 1994-10-25 | 1994-10-25 | Magnetic paste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08124735A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100487625B1 (en) * | 2002-06-12 | 2005-05-03 | 정환명 | Manufacture method for making Magnetic Paste |
| US7695580B2 (en) * | 2006-01-17 | 2010-04-13 | Air Products And Chemicals, Inc. | Method of forming a ceramic to ceramic joint |
| WO2022190647A1 (en) * | 2021-03-10 | 2022-09-15 | 日清紡ホールディングス株式会社 | Magnetic paste |
-
1994
- 1994-10-25 JP JP28591594A patent/JPH08124735A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100487625B1 (en) * | 2002-06-12 | 2005-05-03 | 정환명 | Manufacture method for making Magnetic Paste |
| US7695580B2 (en) * | 2006-01-17 | 2010-04-13 | Air Products And Chemicals, Inc. | Method of forming a ceramic to ceramic joint |
| WO2022190647A1 (en) * | 2021-03-10 | 2022-09-15 | 日清紡ホールディングス株式会社 | Magnetic paste |
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