JP2001214202A - Granulating method and compacting method for magnetic powder - Google Patents
Granulating method and compacting method for magnetic powderInfo
- Publication number
- JP2001214202A JP2001214202A JP2000021255A JP2000021255A JP2001214202A JP 2001214202 A JP2001214202 A JP 2001214202A JP 2000021255 A JP2000021255 A JP 2000021255A JP 2000021255 A JP2000021255 A JP 2000021255A JP 2001214202 A JP2001214202 A JP 2001214202A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- insulating
- insulating coating
- powder
- average particle
- 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
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000000576 coating method Methods 0.000 claims abstract description 59
- 239000011248 coating agent Substances 0.000 claims abstract description 58
- 239000000843 powder Substances 0.000 claims abstract description 41
- 239000002245 particle Substances 0.000 claims abstract description 36
- 239000011230 binding agent Substances 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 15
- 238000005469 granulation Methods 0.000 claims description 11
- 230000003179 granulation Effects 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 abstract description 6
- 235000019353 potassium silicate Nutrition 0.000 description 10
- 229920002050 silicone resin Polymers 0.000 description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は磁性粉末の造粒方法
及び成形方法に関する。磁性粉末を絶縁コーティング
し、その絶縁コーティング物を成形して、その成形物を
焼成したものが、ノイズフィルタや電子回路用基板等に
使用されている。本発明は上記のような磁性粉末の造粒
方法及び成形方法の改良に関する。The present invention relates to a method for granulating and molding magnetic powder. A magnetic powder is subjected to insulation coating, the insulation coating is molded, and the molded product is baked to be used for a noise filter, a substrate for an electronic circuit, or the like. The present invention relates to an improvement in a method for granulating and molding a magnetic powder as described above.
【０００２】[0002]
【従来の技術】従来、磁性粉末、例えば軟磁性粉末に絶
縁材をコーティングし、その絶縁コーティング物を所定
形状にプレス成形し、その成形物を焼成して、ノイズフ
ィルタや電子回路用基板等を制作する場合、軟磁性粉末
にバインダとしてシリコーン樹脂や水ガラス等を塗布
し、通常は併せて造粒したものをプレス成形に供してい
る。これらのバインダはそれ自体が絶縁材となり得るた
め、軟磁性粉末にかかるバインダを塗布したもの、更に
は造粒したものは絶縁コーティング物となるが、かかる
バインダと共に絶縁材としてアルミナやシリカ等を塗布
したものも使用されている。ところが、上記のような従
来法には、磁性粉末の造粒、或はまた成形に際して、シ
リコーン樹脂や水ガラス等のバインダを使用する必要が
あり、かかるバインダに起因して、得られる焼成物の磁
気特性及び電気特性が悪いという問題がある。2. Description of the Related Art Conventionally, an insulating material is coated on a magnetic powder, for example, a soft magnetic powder, the insulating coating is press-molded into a predetermined shape, and the molded product is baked to produce a noise filter or a substrate for an electronic circuit. When producing, soft resin powder is coated with a silicone resin, water glass, or the like as a binder, and usually granulated together is subjected to press molding. Since these binders can themselves be insulating materials, those coated with a binder to soft magnetic powder, and those agglomerated, become insulating coatings, but with such binders coated with alumina or silica as insulating material. Those that have been used. However, in the conventional method as described above, it is necessary to use a binder such as a silicone resin or water glass at the time of granulation or molding of the magnetic powder. There is a problem that magnetic properties and electric properties are poor.
【０００３】[0003]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、従来の磁性粉末の造粒方法及び成形方法で
は、シリコーン樹脂や水ガラス等のバインダを使用する
必要があり、かかるバインダに起因して、得られる焼成
物の磁気特性及び電気特性が悪いという点である。The problem to be solved by the present invention is that the conventional methods for granulating and molding magnetic powder require the use of a binder such as a silicone resin or water glass, and such a binder is difficult to use. For this reason, the obtained sintered product has poor magnetic and electrical properties.
【０００４】[0004]
【課題を解決するための手段】上記の課題を解決する本
発明は、磁性粉末を絶縁コーティングしつつ造粒する方
法であって、絶縁コーティング材兼バインダとして平均
粒径１μｍ以下の絶縁性微粉末を用いることを特徴とす
る磁性粉末の造粒方法に係る。また本発明は、磁性粉末
の絶縁コーティング物を成形する方法であって、絶縁コ
ーティング物が絶縁コーティング材兼バインダとして平
均粒径１μｍ以下の絶縁性微粉末を用いたものであるこ
とを特徴とする磁性粉末の成形方法に係る。SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems is a method of granulating a magnetic powder while insulatingly coating the same, wherein the insulating fine powder having an average particle diameter of 1 μm or less is used as an insulating coating material and a binder. And a method for granulating a magnetic powder. The present invention also relates to a method for forming an insulating coating of a magnetic powder, wherein the insulating coating uses an insulating fine powder having an average particle size of 1 μm or less as an insulating coating material and a binder. The present invention relates to a method for forming a magnetic powder.
【０００５】本発明において肝要な点は、絶縁コーティ
ング材兼バインダとして平均粒径１μｍ以下、好ましく
は平均粒径０．６μｍ以下の絶縁性微粉末を用いる処に
ある。かかる絶縁性微粉末は、絶縁材として機能するだ
けでなく、それ自体が有する凝集力により、バインダと
しても機能する。例えば、軟磁性粉末と、平均粒径１μ
ｍ以下、好ましくは平均粒径０．６μｍ以下の絶縁性微
粉末とを乾式或は湿式で混合すると、別にシリコーン樹
脂や水ガラス等のバインダを使用する必要はなく、該軟
磁性粉末の表面に該絶縁性微粉末がコーティングされた
絶縁コーティング物が得られるのである。平均粒径が１
μｍを超えるような絶縁性粉末、例えば平均粒径数μｍ
乃至数十μｍの絶縁性粉末では、それ自体が有する凝集
力が不足し、バインダとしての機能が不足するため、軟
磁性粉末とかかる絶縁性粉末とを乾式或は湿式で混合し
ても、該軟磁性粉末の表面に該絶縁性粉末がコーティン
グされた絶縁コーティング物は得られず、かかる絶縁コ
ーティング物を得るためには、別にシリコーン樹脂や水
ガラス等のバインダを使用する必要がある。An important point in the present invention is that an insulating fine powder having an average particle diameter of 1 μm or less, preferably 0.6 μm or less is used as an insulating coating material and a binder. Such an insulating fine powder not only functions as an insulating material, but also functions as a binder due to its own cohesive force. For example, soft magnetic powder and an average particle diameter of 1 μm
m or less, preferably an insulating fine powder having an average particle size of 0.6 μm or less, when dry or wet mixed, there is no need to use a binder such as a silicone resin or water glass, and the surface of the soft magnetic powder Thus, an insulating coating material coated with the insulating fine powder is obtained. Average particle size is 1
Insulating powder exceeding μm, for example, average particle size of several μm
In the case of insulating powder having a thickness of from 10 μm to several tens μm, the cohesive force of the insulating powder itself is insufficient and the function as a binder is insufficient, so that even if the soft magnetic powder and the insulating powder are mixed in a dry or wet method, An insulating coating in which the surface of a soft magnetic powder is coated with the insulating powder cannot be obtained. In order to obtain such an insulating coating, it is necessary to use a binder such as a silicone resin or water glass.
【０００６】本発明に係る磁性粉末の造粒方法では、絶
縁コーティング材兼バインダとして平均粒径１μｍ以
下、好ましくは平均粒径０．６μｍ以下の絶縁性微粉末
を用い、磁性粉末とかかる絶縁性微粉末とを混合し、造
粒する。また本発明に係る磁性粉末の成形方法では、絶
縁コーティング材兼バインダとして上記と同様の絶縁性
微粉末を用い、磁性粉末とかかる絶縁性微粉末とを混合
し、得られた絶縁コーティング物を成形する。この場
合、磁性粉末と絶縁性微粉末とを混合して得た絶縁コー
ティング物をそのまま成形に供することもできるが、成
形時における作業性及び作業環境を改善するため、磁性
粉末と絶縁性微粉末とを混合し、造粒して得た絶縁コー
ティング物を成形に供するのが好ましい。In the method of granulating a magnetic powder according to the present invention, an insulating fine powder having an average particle diameter of 1 μm or less, preferably 0.6 μm or less is used as an insulating coating material and a binder. Mix with fine powder and granulate. Further, in the method for forming a magnetic powder according to the present invention, the same insulating fine powder as described above is used as an insulating coating material and a binder, and the magnetic powder and the insulating fine powder are mixed to form the obtained insulating coating. I do. In this case, the insulating coating obtained by mixing the magnetic powder and the insulating fine powder can be directly used for molding.However, in order to improve workability and working environment during molding, the magnetic powder and the insulating fine powder are used. Is mixed and granulated, and the resulting insulating coating is preferably subjected to molding.
【０００７】本発明に係る磁性粉末の造粒方法及び成形
方法を利用してノイズフィルタや電子回路用基板等を制
作する場合、具体的には例えば、軟磁性粉末と、平均粒
径１μｍ以下、好ましくは平均粒径０．６μｍ以下の絶
縁性微粉末とを混合し、造粒して得た絶縁コーティング
物を所定形状にプレス成形して、その成形物を焼成し、
通常はその焼成物を焼鈍する。この場合、軟磁性粉末と
しては、公知のアモルファス合金粉末、パーマロイ合金
粉末、モリブデンパーマロイ合金粉末、センダスト合金
粉末等を使用できる。When a noise filter, a substrate for an electronic circuit, or the like is manufactured using the method for granulating and molding a magnetic powder according to the present invention, specifically, for example, a soft magnetic powder and an average particle diameter of 1 μm or less are used. Preferably mixed with an insulating fine powder having an average particle size of 0.6 μm or less, the insulating coating obtained by granulation is press-formed into a predetermined shape, and the formed product is fired,
Usually, the fired product is annealed. In this case, as the soft magnetic powder, known amorphous alloy powder, permalloy alloy powder, molybdenum permalloy alloy powder, sendust alloy powder, or the like can be used.
【０００８】本発明において、磁性粉末と絶縁性微粉末
との混合、更に造粒、及び得られた絶縁コーティング物
の成形には、公知の混合機、造粒機、成形機を使用でき
る。磁性粉末と絶縁性微粉末との混合、更に造粒は、乾
式で行なうことができるが、湿式で行なうこともでき
る。湿式で行なう場合、媒体としては水、低級アルコー
ル類、これらの混合液を使用できる。また本発明におい
て、絶縁性微粉末としては、アルミナ、シリカ、マグネ
シア等を使用できるが、アルミナ及び／又はシリカを使
用するのが好ましい。In the present invention, known mixers, granulators, and molding machines can be used for mixing the magnetic powder and the insulating fine powder, further granulating, and molding the obtained insulating coating. The mixing of the magnetic powder and the insulating fine powder and the granulation can be performed by a dry method, but can also be performed by a wet method. In the case of the wet method, water, lower alcohols, and a mixture thereof can be used as the medium. In the present invention, alumina, silica, magnesia and the like can be used as the insulating fine powder, but it is preferable to use alumina and / or silica.
【０００９】更に本発明において、磁性粉末に対する絶
縁性微粉末の使用割合は、最終的に得られる焼成物に求
められる磁気特性及び電気特性に応じて任意であるが、
磁性粉末１００重量部当たり、絶縁性微粉末を５〜３０
重量部とするのが好ましく、絶縁性微粉末を１０〜２０
重量部とするのがより好ましい。磁性粉末と絶縁性微粉
末との混合時、更に造粒時、及び得られた絶縁コーティ
ング物の成形時において、該絶縁性微粉末に絶縁コーテ
ィング材兼バインダとしての機能を充分に発揮させ、併
せて最終的に得られる焼成物に所望通りの磁気特性及び
電気特性を持たせるためである。Further, in the present invention, the ratio of the insulating fine powder to the magnetic powder is optional depending on the magnetic and electrical properties required of the finally obtained fired product.
5 to 30 parts of insulating fine powder per 100 parts by weight of magnetic powder
Parts by weight, preferably 10 to 20 parts by weight of insulating fine powder.
It is more preferred to be parts by weight. At the time of mixing the magnetic powder and the insulating fine powder, further granulating, and at the time of molding the obtained insulating coating, the insulating fine powder sufficiently exerts its function as an insulating coating material and also as a binder. This is to give the finally obtained fired product the desired magnetic and electrical properties.
【００１０】本発明に係る磁性粉末の造粒方法による
と、別にシリコーン樹脂や水ガラス等のバインダを使用
しなくても、磁性粉末を絶縁コーティングしつつ造粒す
ることができる。また本発明に係る磁性粉末の成形方法
によると、別にシリコーン樹脂や水ガラス等のバインダ
を使用しなくても、得られた絶縁コーティング物を成形
することができる。そして本発明に係る磁性粉末の造粒
方法及び成形方法を利用してノイズフィルタや電子回路
用基板等を制作すると、別にシリコーン樹脂や水ガラス
等のバインダを使用しないため、磁気特性及び電気特性
に優れた焼成物を得ることができる。According to the method for granulating magnetic powder of the present invention, granulation can be performed while insulating coating the magnetic powder without using a binder such as silicone resin or water glass. Further, according to the magnetic powder molding method of the present invention, the obtained insulating coating can be molded without using a binder such as a silicone resin or water glass. When a noise filter or a substrate for an electronic circuit is manufactured using the magnetic powder granulation method and the molding method according to the present invention, the magnetic properties and the electrical properties are reduced because a binder such as silicone resin or water glass is not separately used. An excellent fired product can be obtained.
【００１１】[0011]
【発明の実施の形態】本発明に係る磁性粉末の造粒方法
及び成形方法の実施形態としては、下記の１）〜４）が
挙げられる。 １）絶縁コーティング材兼バインダとして平均粒径０．
６μｍのアルミナを用い、９．６重量％のＳｉ、３．５
重量％のＡｌ、残部がＦｅ及び不可避不純物からなる平
均粒径１０μｍの軟磁性粉末１００重量部と、上記のア
ルミナ１２重量部とを、ヘンシェル型ミキサに供して、
混合し、造粒する、軟磁性粉末を絶縁コーティングしつ
つ造粒する方法。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for granulating and molding a magnetic powder according to the present invention include the following 1) to 4). 1) The average particle size is 0.
Using 6 μm alumina, 9.6 wt% of Si, 3.5
100 parts by weight of a soft magnetic powder having an average particle size of 10 μm consisting of Al (wt%), the balance being Fe and unavoidable impurities, and 12 parts by weight of the above alumina were subjected to a Henschel mixer,
A method of mixing and granulating, and granulating the soft magnetic powder while insulating coating.
【００１２】２）絶縁コーティング材兼バインダとして
平均粒径０．６μｍのシリカを用い、９．６重量％のＳ
ｉ、３．５重量％のＡｌ、残部がＦｅ及び不可避不純物
からなる平均粒径１０μｍの軟磁性粉末１００重量部
と、上記のシリカ１２重量部とを、ヘンシェル型ミキサ
に供して、混合し、造粒する、軟磁性粉末を絶縁コーテ
ィングしつつ造粒する方法。2) Silica having an average particle diameter of 0.6 μm is used as an insulating coating material and a binder, and 9.6% by weight of S is used.
i, 100 parts by weight of a soft magnetic powder having an average particle diameter of 10 μm composed of 3.5% by weight of Al, the balance being Fe and unavoidable impurities, and 12 parts by weight of the above silica were supplied to a Henschel mixer, and mixed. Granulation, a method of granulating a soft magnetic powder while insulating coating.
【００１３】３）前記の１）で造粒して得た絶縁コーテ
ィング物をプレス成形に供し、１２０ＭＰａでプレス成
形する、軟磁性粉末の絶縁コーティング物を成形する方
法。3) A method of forming an insulating coating of soft magnetic powder by subjecting the insulating coating obtained by granulation in the above 1) to press molding and press molding at 120 MPa.
【００１４】４）前記の２）で造粒して得た絶縁コーテ
ィング物をプレス成形に供し、１１０ＭＰａでプレス成
形する、軟磁性粉末の絶縁コーティング物を成形する方
法。4) A method of forming an insulating coating of a soft magnetic powder by subjecting the insulating coating obtained by granulation in the above 2) to press molding and pressing at 110 MPa.
【００１５】[0015]
【実施例】実施例１ ９．６重量％のＳｉ、３．５重量％のＡｌ、残部がＦｅ
及び不可避不純物からなる平均粒径１０μｍの軟磁性粉
末１００重量部と、平均粒径０．６μｍのアルミナ１２
重量部とを、ヘンシェル型ミキサに供して（回転時間１
５分、回転数１５０回／分）、混合及び造粒し、平均粒
径７０μｍの、軟磁性粉末の絶縁コーティング物を得
た。この絶縁コーティング物をプレス成形に供し、１２
０ＭＰａでプレス成形して、外径２８mm×内径２０mm×
高さ５mmのリング状の成形物を得た。別に、同様にし
て、直径５mm×長さ１０mmの柱状の成形物を得た。EXAMPLE 1 9.6% by weight of Si, 3.5% by weight of Al and the balance of Fe
And 100 parts by weight of a soft magnetic powder having an average particle size of 10 μm and alumina 12 having an average particle size of 0.6 μm.
Parts by weight to a Henschel mixer (rotation time 1
The mixture was mixed and granulated for 5 minutes at a rotation speed of 150 times / minute) to obtain an insulating coating of a soft magnetic powder having an average particle size of 70 μm. This insulating coating was subjected to press molding, and 12
Press molding at 0MPa, outer diameter 28mm x inner diameter 20mm x
A ring-shaped molded product having a height of 5 mm was obtained. Separately, similarly, a columnar molded product having a diameter of 5 mm and a length of 10 mm was obtained.
【００１６】実施例２ 実施例１と同じ軟磁性粉末１００重量部と、平均粒径
０．８μｍのアルミナ１４重量部とを、ヘンシェル型ミ
キサに供して（回転時間１５分、回転数１５０回／
分）、混合及び造粒し、平均粒径７０μｍの、軟磁性粉
末の絶縁コーティング物を得た。この絶縁コーティング
物をプレス成形に供し、１２０ＭＰａでプレス成形し
て、外径２８mm×内径２０mm×高さ５mmのリング状の成
形物を得た。別に、同様にして、直径５mm×長さ１０mm
の柱状の成形物を得た。Example 2 100 parts by weight of the same soft magnetic powder as in Example 1 and 14 parts by weight of alumina having an average particle diameter of 0.8 μm were supplied to a Henschel mixer (rotation time: 15 minutes, rotation number: 150 times /
Minutes), mixed and granulated to obtain a soft magnetic powder insulating coating having an average particle diameter of 70 μm. This insulating coating was subjected to press molding and press-molded at 120 MPa to obtain a ring-shaped molded product having an outer diameter of 28 mm, an inner diameter of 20 mm, and a height of 5 mm. Separately, in the same way, diameter 5mm × length 10mm
Was obtained.
【００１７】比較例１ 実施例１と同じ軟磁性粉末１００重量部と、平均粒径３
μｍのアルミナ１０重量部と、水ガラス２重量部とを、
ヘンシェル型ミキサに供して（回転時間１５分、回転数
１５０回／分）、混合及び造粒し、平均粒径７０μｍ
の、軟磁性粉末の絶縁コーティング物を得た。この絶縁
コーティング物をプレス成形に供し、１２０ＭＰａでプ
レス成形して、外径２８mm×内径２０mm×高さ５mmのリ
ング状の成形物を得た。別に、同様にして、直径５mm×
長さ１０mmの柱状の成形物を得た。Comparative Example 1 100 parts by weight of the same soft magnetic powder as in Example 1 and an average particle size of 3
10 parts by weight of μm alumina and 2 parts by weight of water glass,
The mixture was subjected to a Henschel mixer (rotation time: 15 minutes, rotation number: 150 times / minute), mixed and granulated, and the average particle diameter was 70 μm.
Of a soft magnetic powder was obtained. This insulating coating was subjected to press molding and press-molded at 120 MPa to obtain a ring-shaped molded product having an outer diameter of 28 mm, an inner diameter of 20 mm, and a height of 5 mm. Separately, in the same way, diameter 5mm ×
A columnar molded product having a length of 10 mm was obtained.
【００１８】比較例２ 実施例１と同じ軟磁性粉末１００重量部と、シリコーン
樹脂２重量部とを、ヘンシェル型ミキサに供して（回転
時間１５分、回転数１５０回／分）、混合及び造粒し、
平均粒径７０μｍの、軟磁性粉末の絶縁コーティング物
を得た。この絶縁コーティング物をプレス成形に供し、
１３０ＭＰａでプレス成形して、外径２８mm×内径２０
mm×高さ５mmのリング状の成形物を得た。別に、同様に
して、直径５mm×長さ１０mmの柱状の成形物を得た。Comparative Example 2 100 parts by weight of the same soft magnetic powder as in Example 1 and 2 parts by weight of a silicone resin were supplied to a Henschel mixer (rotation time: 15 minutes, number of rotations: 150 times / minute) to mix and mix. Granulate,
An insulating coating of a soft magnetic powder having an average particle size of 70 μm was obtained. This insulation coating is subjected to press molding,
Press molding at 130MPa, outer diameter 28mm x inner diameter 20
A ring-shaped molded product of mm × 5 mm in height was obtained. Separately, similarly, a columnar molded product having a diameter of 5 mm and a length of 10 mm was obtained.
【００１９】実施例３ ６．５重量％のＳｉ、残部がＦｅ及び不可避不純物から
なる平均粒径１０μｍの軟磁性粉末１００重量部と、平
均粒径０．６μｍのシリカ１２重量部とを、ヘンシェル
型ミキサに供して（回転時間１５分、回転数１５０回／
分）、混合及び造粒し、平均粒径７０μｍの、軟磁性粉
末の絶縁コーティング物を得た。この絶縁コーティング
物をプレス成形に供し、１２０ＭＰａでプレス成形し
て、外径２８mm×内径２０mm×高さ５mmのリング状の成
形物を得た。別に、同様にして、直径５mm×長さ１０mm
の柱状の成形物を得た。Example 3 100 parts by weight of a soft magnetic powder having an average particle diameter of 10 μm consisting of 6.5% by weight of Si, the balance being Fe and unavoidable impurities, and 12 parts by weight of silica having an average particle diameter of 0.6 μm were mixed with Henschel. (15 rotations, 150 rotations /
Minutes), mixed and granulated to obtain a soft magnetic powder insulating coating having an average particle diameter of 70 μm. This insulating coating was subjected to press molding and press-molded at 120 MPa to obtain a ring-shaped molded product having an outer diameter of 28 mm, an inner diameter of 20 mm, and a height of 5 mm. Separately, in the same way, diameter 5mm × length 10mm
Was obtained.
【００２０】実施例４ 実施例３と同じ軟磁性粉末１００重量部と、平均粒径
０．８μｍのシリカ１４重量部とを、ヘンシェル型ミキ
サに供して（回転時間１５分、回転数１５０回／分）、
混合及び造粒し、平均粒径７０μｍの、軟磁性粉末の絶
縁コーティング物を得た。この絶縁コーティング物をプ
レス成形に供し、１２０ＭＰａでプレス成形して、外径
２８mm×内径２０mm×高さ５mmのリング状の成形物を得
た。別に、同様にして、直径５mm×長さ１０mmの柱状の
成形物を得た。Example 4 100 parts by weight of the same soft magnetic powder as in Example 3 and 14 parts by weight of silica having an average particle diameter of 0.8 μm were supplied to a Henschel mixer (rotation time 15 minutes, rotation number 150 times / Minutes),
After mixing and granulation, an insulating coating of a soft magnetic powder having an average particle size of 70 μm was obtained. This insulating coating was subjected to press molding and press-molded at 120 MPa to obtain a ring-shaped molded product having an outer diameter of 28 mm, an inner diameter of 20 mm, and a height of 5 mm. Separately, similarly, a columnar molded product having a diameter of 5 mm and a length of 10 mm was obtained.
【００２１】比較例３ 実施例３と同じ軟磁性粉末１００重量部と、平均粒径３
μｍのシリカ１０重量部と、水ガラス２重量部とを、ヘ
ンシェル型ミキサに供して（回転時間１５分、回転数１
５０回／分）、混合及び造粒し、平均粒径７０μｍの、
軟磁性粉末の絶縁コーティング物を得た。この絶縁コー
ティング物をプレス成形に供し、１２０ＭＰａでプレス
成形して、外径２８mm×内径２０mm×高さ５mmのリング
状の成形物を得た。別に、同様にして、直径５mm×長さ
１０mmの柱状の成形物を得た。Comparative Example 3 The same soft magnetic powder as in Example 3 (100 parts by weight)
10 parts by weight of silica having a particle diameter of 2 μm and 2 parts by weight of water glass are supplied to a Henschel mixer (rotation time: 15 minutes, rotation number: 1).
50 times / min), mixed and granulated, with an average particle size of 70 μm,
An insulating coating of soft magnetic powder was obtained. This insulating coating was subjected to press molding and press-molded at 120 MPa to obtain a ring-shaped molded product having an outer diameter of 28 mm, an inner diameter of 20 mm, and a height of 5 mm. Separately, similarly, a columnar molded product having a diameter of 5 mm and a length of 10 mm was obtained.
【００２２】比較例４ 実施例３と同じ軟磁性粉末１００重量部と、シリコーン
樹脂２重量部とを、ヘンシェル型ミキサに供して（回転
時間１５分、回転数１５０回／分）、混合及び造粒し、
平均粒径７０μｍの、軟磁性粉末の絶縁コーティング物
を得た。この絶縁コーティング物をプレス成形に供し、
１３０ＭＰａでプレス成形して、外径２８mm×内径２０
mm×高さ５mmのリング状の成形物を得た。別に、同様に
して、直径５mm×長さ１０mmの柱状の成形物を得た。Comparative Example 4 100 parts by weight of the same soft magnetic powder as in Example 3 and 2 parts by weight of a silicone resin were supplied to a Henschel mixer (rotation time: 15 minutes, rotation number: 150 times / minute) to mix and produce. Granulate,
An insulating coating of a soft magnetic powder having an average particle size of 70 μm was obtained. This insulation coating is subjected to press molding,
Press molding at 130MPa, outer diameter 28mm x inner diameter 20
A ring-shaped molded product of mm × 5 mm in height was obtained. Separately, similarly, a columnar molded product having a diameter of 5 mm and a length of 10 mm was obtained.
【００２３】評価 各例で得たそれぞれ２種類の成形物を７００℃で焼鈍し
て、試験片とした。リング状の試験片をＬＣＲメータに
供し（巻線数Ｎ＝４０）、透磁率を測定した。また焼鈍
した棒状の試験片をＬＣＲメータに供し、電気抵抗率
（Ωｍ）を測定した。結果を表１にまとめて示した。Evaluation Two types of molded products obtained in each example were annealed at 700 ° C. to obtain test pieces. The ring-shaped test piece was subjected to an LCR meter (number of windings N = 40), and the magnetic permeability was measured. The annealed rod-shaped test piece was subjected to an LCR meter to measure the electrical resistivity (Ωm). The results are summarized in Table 1.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【発明の効果】既に明らかなように、以上説明した本発
明には、別にバインダを使用しなくても、磁性粉末を絶
縁コーティングしつつ造粒することができ、また更に成
形することができ、結果として磁気特性及び電気特性に
優れた焼成物を得ることができるという効果がある。As is clear from the above, according to the present invention described above, it is possible to granulate the magnetic powder while insulatingly coating it, and to further mold it without using a separate binder. As a result, there is an effect that a fired product having excellent magnetic properties and electric properties can be obtained.
Claims (9)
する方法であって、絶縁コーティング材兼バインダとし
て平均粒径１μｍ以下の絶縁性微粉末を用いることを特
徴とする磁性粉末の造粒方法。1. A method of granulating a magnetic powder while insulatingly coating the magnetic powder, wherein an insulating fine powder having an average particle diameter of 1 μm or less is used as an insulating coating material and a binder.
均粒径０．６μｍ以下の絶縁性微粉末を用いる請求項１
記載の磁性粉末の造粒方法。2. An insulating fine powder having an average particle size of 0.6 μm or less is used as an insulating coating material and a binder.
A granulation method for the magnetic powder according to the above.
カである請求項１又は２記載の磁性粉末の造粒方法。3. The method for granulating magnetic powder according to claim 1, wherein the insulating fine powder is alumina and / or silica.
末を５〜３０重量部の割合で用いる請求項１、２又は３
記載の磁性粉末の造粒方法。4. The method according to claim 1, wherein the insulating fine powder is used in an amount of 5 to 30 parts by weight per 100 parts by weight of the magnetic powder.
A granulation method for the magnetic powder according to the above.
る方法であって、絶縁コーティング物が絶縁コーティン
グ材兼バインダとして平均粒径１μｍ以下の絶縁性微粉
末を用いたものであることを特徴とする磁性粉末の成形
方法。5. A method for forming an insulating coating of magnetic powder, characterized in that the insulating coating uses an insulating fine powder having an average particle diameter of 1 μm or less as an insulating coating material and a binder. Method for molding magnetic powder.
材兼バインダとして平均粒径１μｍ以下の絶縁性微粉末
を用いて造粒したものである請求項５記載の磁性粉末の
成形方法。6. The method for forming a magnetic powder according to claim 5, wherein the insulating coating material is granulated by using an insulating fine powder having an average particle diameter of 1 μm or less as an insulating coating material and a binder.
均粒径０．６μｍ以下の絶縁性微粉末を用いる請求項５
又は６記載の磁性粉末の成形方法。7. An insulating fine powder having an average particle diameter of 0.6 μm or less is used as an insulating coating material and a binder.
Or a method for molding a magnetic powder according to item 6.
カである請求項５、６又は７記載の磁性粉末の成形方
法。8. The method according to claim 5, wherein the insulating fine powder is alumina and / or silica.
量部当たり絶縁性微粉末を５〜３０重量部の割合で用い
たものである請求項５、６、７又は８記載の磁性粉末の
成形方法。9. The method of molding a magnetic powder according to claim 5, wherein the insulating coating material uses 5 to 30 parts by weight of an insulating fine powder per 100 parts by weight of the magnetic powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000021255A JP2001214202A (en) | 2000-01-31 | 2000-01-31 | Granulating method and compacting method for magnetic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000021255A JP2001214202A (en) | 2000-01-31 | 2000-01-31 | Granulating method and compacting method for magnetic powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001214202A true JP2001214202A (en) | 2001-08-07 |
Family
ID=18547690
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000021255A Pending JP2001214202A (en) | 2000-01-31 | 2000-01-31 | Granulating method and compacting method for magnetic powder |
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| Country | Link |
|---|---|
| JP (1) | JP2001214202A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150120405A (en) * | 2013-02-20 | 2015-10-27 | 오를리콘 메트코 (유에스) 아이엔씨. | Electrically insulating material for thermal sprayed coatings |
-
2000
- 2000-01-31 JP JP2000021255A patent/JP2001214202A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150120405A (en) * | 2013-02-20 | 2015-10-27 | 오를리콘 메트코 (유에스) 아이엔씨. | Electrically insulating material for thermal sprayed coatings |
| JP2016508548A (en) * | 2013-02-20 | 2016-03-22 | エリコン メトコ（ユーエス）インコーポレイテッド | Electrical insulating materials for thermal spray coatings |
| US10311996B2 (en) | 2013-02-20 | 2019-06-04 | Oerlikon Metco (Us) Inc. | Electrically insulating material for thermal sprayed coatings matching the coefficient of thermal expansion of the underlying body |
| KR102195620B1 (en) * | 2013-02-20 | 2020-12-29 | 오를리콘 메트코 (유에스) 아이엔씨. | Electrically insulating material for thermal sprayed coatings |
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