JP7238511B2 - Ni-based ferrite and coil parts using the same - Google Patents
Ni-based ferrite and coil parts using the same Download PDFInfo
- Publication number
- JP7238511B2 JP7238511B2 JP2019051780A JP2019051780A JP7238511B2 JP 7238511 B2 JP7238511 B2 JP 7238511B2 JP 2019051780 A JP2019051780 A JP 2019051780A JP 2019051780 A JP2019051780 A JP 2019051780A JP 7238511 B2 JP7238511 B2 JP 7238511B2
- Authority
- JP
- Japan
- Prior art keywords
- mol
- based ferrite
- less
- magnetic
- mno
- 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.)
- Active
Links
Images
Description
本発明は、コイル部品等に使用されるＮｉ系フェライトとそれを用いたコイル部品に関するものである。 TECHNICAL FIELD The present invention relates to a Ni-based ferrite used for coil components and the like, and coil components using the same.
磁性フェライトはスピネル型結晶構造を有し、その化学量論組成は３価化合物と２価化合物が等モルに配合されることが知られている。例えばＮｉ系フェライトのスピネル型結晶（一般式Ｆｅ２Ｏ３・ＭｅＯ）は、Ｆｅ２Ｏ３とＭｅＯ（Ｍｅ：Ｎｉ，Ｚｎ）が５０：５０の比率で化学量論組成となる。 Magnetic ferrite has a spinel-type crystal structure, and its stoichiometric composition is known to contain equimolar amounts of a trivalent compound and a divalent compound. For example, spinel-type crystals of Ni-based ferrite (general formula: Fe 2 O 3 ·MeO) have a stoichiometric composition of Fe 2 O 3 and MeO (Me:Ni, Zn) at a ratio of 50:50.
このような磁性フェライトの一般的な製造方法では、磁性フェライトを構成する元素の酸化物等を素原料として準備し、それを所定の組成となるように配合し焼成してスピネル化する。均一なスピネル化反応を得る観点から、素原料を本焼成よりも低温度で焼成してスピネル化する仮焼成を経て得られた仮焼粉を所定の形状に固めて成形して成形体とし、それを焼結して磁心とする製法を採用する場合が多い。 In a general manufacturing method of such a magnetic ferrite, oxides of elements constituting the magnetic ferrite are prepared as raw materials, blended so as to have a predetermined composition, and fired to form a spinel. From the viewpoint of obtaining a uniform spinelization reaction, the raw material is fired at a temperature lower than that of the main firing to form a spinel. In many cases, a method of sintering it to make a magnetic core is adopted.
磁性フェライトの磁気特性は組成に強く依存することが知られている。コイル部品等に用いられる磁性フェライトとして要求される特性としては、例えば小型化のためには、使用される周波数、温度領域において初透磁率μｉが高くて、所定の印加磁界での磁束密度が大きく、保磁力が小さいことが挙げられる。 It is known that the magnetic properties of magnetic ferrite strongly depend on the composition. The characteristics required for magnetic ferrite used in coil parts and the like include, for example, a high initial magnetic permeability μi in the frequency and temperature range used and a large magnetic flux density in a predetermined applied magnetic field for miniaturization. , and low coercive force.
特許文献１には、Ｆｅ２Ｏ３を４０～５０ｍｏｌ％、ＺｎＯを２０～３３ｍｏｌ％、ＣｕＯを２～１０ｍｏｌ％、ＭｎＯ２を０．１～１ｍｏｌ％含有し、残部がＮｉＯの、磁気損失が低減されたＮｉ系フェライト材料が記載されている。 Patent Document 1 describes a magnetic loss sensor containing 40 to 50 mol% of Fe 2 O 3 , 20 to 33 mol% of ZnO, 2 to 10 mol% of CuO, 0.1 to 1 mol% of MnO 2 , and the balance being NiO. A reduced Ni-based ferrite material is described.
特許文献１ではＭｎＯ２を使用し、Ｍｎ４＋のイオンをスピネル結晶のイオン結晶間へ侵入させ、各イオン間の距離を大きくすることで、結晶の歪や結晶中の応力を減少させて保磁力を小さくしてＮｉ系フェライト材料のヒステリシス損失を低減する。しかし、所定の印加磁界での磁束密度が大きく、初透磁率μｉが高いとの記載は見られない。 In Patent Document 1, MnO 2 is used, Mn 4+ ions are allowed to penetrate between the ion crystals of the spinel crystal, and the distance between each ion is increased to reduce the strain of the crystal and the stress in the crystal, thereby reducing the coercive force. is reduced to reduce the hysteresis loss of the Ni-based ferrite material. However, there is no description that the magnetic flux density in a predetermined applied magnetic field is large and the initial magnetic permeability μi is high.
そこで本発明は、保磁力が小さく、初透磁率μｉが大きく、かつ所定の印加磁界での磁束密度が大きいＮｉ系フェライトと、それを用いたコイル部品を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a Ni-based ferrite having a small coercive force, a large initial permeability μi, and a large magnetic flux density in a predetermined applied magnetic field, and a coil component using the same.
第１の発明は、２０℃での初透磁率μｉ が６００以上で、保磁力Ｈｃが５０Ａ／ｍ未満で、印加磁界４ｋＡ／ｍ における磁束密度Ｂ４ｋが３６０ｍＴ以上のＮｉ系フェライトであって、前記Ｎｉ系フェライトの成分組成が、４５．５ｍｏｌ％以上４７．０ｍｏｌ％以下のＦｅ２Ｏ３、２８．０ｍｏｌ％以上３０．０ｍｏｌ％以下のＺｎＯ、７．５ｍｏｌ％以上９．０ｍｏｌ％以下のＣｕＯ、１．２ｍｏｌ％超４．２ｍｏｌ％以下のＭｎＯ、及び残部ＮｉＯとして表され、Ｆｅ２Ｏ３とＭｎＯとの合計量が、４８．２ｍｏｌ％超４９．８ｍｏｌ％以下のＮｉ系フェライトである。 A first invention is a Ni-based ferrite having an initial magnetic permeability μi of 600 or more at 20° C., a coercive force Hc of less than 50 A/m, and a magnetic flux density B4k of 360 mT or more in an applied magnetic field of 4 kA/m , The component composition of the Ni-based ferrite is 45.5 mol% or more and 47.0 mol% or less of Fe 2 O 3 , 28.0 mol% or more and 30.0 mol% or less of ZnO, 7.5 mol% or more and 9.0 mol% or less of CuO, It is a Ni-based ferrite in which the total amount of Fe 2 O 3 and MnO is expressed as more than 1.2 mol % and 4.2 mol % or less of MnO and the balance is NiO, and the total amount of Fe 2 O 3 and MnO is more than 48.2 mol % and 49.8 mol % or less.
本発明のＮｉ系フェライトは、Ｆｅ２Ｏ３とＭｎＯとの合計量が４８．５ｍｏｌ％以上で、２０℃での初透磁率μｉが６５０以上であり、密度が５．２０×１０３ｋｇ／ｍ３超であるのが好ましい。 The Ni-based ferrite of the present invention has a total amount of Fe 2 O 3 and MnO of 48.5 mol % or more, an initial magnetic permeability μi at 20° C. of 650 or more, and a density of 5.20×10 3 kg/ m 3 is preferred.
第２の発明は、第１の発明のＮｉ系フェライトを用いたコイル部品であって、前記コイル部品は、コイルと、前記コイルの磁路に配置される第１の発明のＮｉ系フェライトで構成された磁心とを含むコイル部品である。 A second invention is a coil component using the Ni-based ferrite of the first invention, wherein the coil component comprises a coil and the Ni-based ferrite of the first invention arranged in the magnetic path of the coil. and a coil component including a magnetic core.
本発明によれば、保磁力が小さく、初透磁率μｉが大きく、かつ所定の印加磁界での磁束密度が大きいＮｉ系フェライトと、それを用いたコイル部品を提供することができる。 According to the present invention, it is possible to provide a Ni-based ferrite having a small coercive force, a large initial permeability μi, and a large magnetic flux density in a predetermined applied magnetic field, and a coil component using the same.
以下、本発明の実施形態に係るＮｉ系フェライトとそれを用いたコイル部品について具体的に説明する。ただし、本発明はこれに限定されるものではなく、技術的思想の範囲内で適宜変更可能である。 Hereinafter, a Ni-based ferrite and a coil component using the same according to embodiments of the present invention will be specifically described. However, the present invention is not limited to this, and can be modified as appropriate within the scope of the technical idea.
（Ａ）組成
本実施形態のＮｉ系フェライトは、Ｆｅ２Ｏ３、ＺｎＯ、ＣｕＯ、ＭｎＯ、ＮｉＯの総量を１００ｍｏｌ％とし、４５．５ｍｏｌ％以上４７．０ｍｏｌ％以下のＦｅ２Ｏ３、２８．０ｍｏｌ％以上３０．０ｍｏｌ％以下のＺｎＯ、７．５ｍｏｌ％以上９．０ｍｏｌ％以下のＣｕＯ、１．２ｍｏｌ％超４．２ｍｏｌ％以下のＭｎＯ、及び残部ＮｉＯとし、Ｆｅ２Ｏ３とＭｎＯとの合計量が、４８．２ｍｏｌ％超４９．８ｍｏｌ％以下で表される組成で構成される。各素原料中には数ｐｐｍ～数百ｐｐｍ程度の不可避的不純物元素が含まれ得る。具体的な不可避的不純物元素としては、Ｓｉ、Ｃａ、Ｂ、Ｃ、Ｓ、Ｃｌ、Ｓｅ、Ｂｒ、Ｔｅ、Ｉ、Ｌｉ、Ｎａ、Ｍｇ、Ａｌ、Ｋ、Ｇａ、Ｇｅ、Ｓｒ、Ｉｎ、Ｓｎ、Ｓｂ、Ｂａ、Ｂｉ、Ｓｃ、Ｔｉ、Ｖ、Ｃｒ、Ｙ、Ｎｂ、Ｍｏ、Ｐｄ、Ａｇ、Ｈｆ、Ｔａ等が挙げられるが、Ｎｉ系フェライト中の不可避的不純物はＦｅ２Ｏ３、ＺｎＯ、ＣｕＯ、ＮｉＯの総量１００質量部に対して総量で１質量部以下とし、極力少なく抑えるのが好ましい。不可避的不純物の中でもＮａ、Ｓ、Ｃｌ、Ｐ、Ｃｒ、Ｂはできるだけ少ない方が好ましく、工業的な許容範囲は合計で０．１質量部以下が好ましく、更に０．０５質量部以下であることが好ましい。
(A) Composition In the Ni-based ferrite of the present embodiment, the total amount of Fe 2 O 3 , ZnO, CuO, MnO, and NiO is 100 mol %, and Fe 2 O 3 is 45.5 mol % or more and 47.0 mol % or less. 0 mol% or more and 30.0 mol% or less of ZnO, 7.5 mol% or more and 9.0 mol% or less of CuO, 1.2 mol% or more and 4.2 mol% or less of MnO, and the balance of NiO, and Fe 2 O 3 and MnO The total amount is composed of a composition represented by more than 48.2 mol % and 49.8 mol % or less. Each raw material may contain unavoidable impurity elements of several ppm to several hundred ppm. Specific unavoidable impurity elements include Si, Ca, B, C, S, Cl, Se, Br, Te, I, Li, Na, Mg, Al, K, Ga, Ge, Sr, In, Sn, Sb, Ba, Bi, Sc, Ti, V, Cr, Y, Nb, Mo, Pd, Ag, Hf, Ta, etc., but unavoidable impurities in Ni-based ferrite are Fe 2 O 3 , ZnO, CuO , the total amount is 1 part by mass or less with respect to 100 parts by mass of the total amount of NiO. Among the unavoidable impurities, Na, S, Cl, P, Cr, and B are preferably as small as possible, and the industrial acceptable range is preferably 0.1 parts by mass or less in total, and further 0.05 parts by mass or less. is preferred.
本実施形態の組成について、以下説明する。
Ｆｅ２Ｏ３が４５．５ｍｏｌ％未満、あるいは４７．０ｍｏｌ％超では所望の初透磁率μｉや保磁力Ｈｃが得られない場合がある。また高い飽和磁束密度Ｂ４ｋを得る為、好ましくは、Ｆｅ２Ｏ３は４５．７ｍｏｌ％以上が好ましく、より好ましくは４６．０ｍｏｌ％以上である。
The composition of this embodiment will be described below.
If Fe 2 O 3 is less than 45.5 mol % or more than 47.0 mol %, the desired initial permeability μi and coercive force Hc may not be obtained. In order to obtain a high saturation magnetic flux density B4k, Fe 2 O 3 is preferably 45.7 mol % or more, more preferably 46.0 mol % or more.
ＺｎＯが２８．０ｍｏｌ％未満、あるいは３０．０ｍｏｌ％超では、所望の初透磁率μｉや保磁力が得られない場合がある。ＺｎＯの好ましい含有量は２８．５ｍｏｌ％以上である。また２９．５ｍｏｌ％以下が好ましい。 If the ZnO content is less than 28.0 mol % or more than 30.0 mol %, the desired initial permeability μi and coercive force may not be obtained. A preferable content of ZnO is 28.5 mol % or more. Moreover, 29.5 mol% or less is preferable.
ＣｕＯが７．５ｍｏｌ％未満、あるいは９．０ ｍｏｌ％超であると、所望の初透磁率μｉが得られない場合がある。ＣｕＯの好ましい含有量は７．８ｍｏｌ％以上である。また８．５ｍｏｌ％以下が好ましい。 If CuO is less than 7.5 mol % or more than 9.0 mol %, the desired initial magnetic permeability μi may not be obtained. A preferable content of CuO is 7.8 mol % or more. Moreover, 8.5 mol% or less is preferable.
ＭｎＯが１．２０ｍｏｌ％以下、あるいは４．２０ｍｏｌ％超であると、所望の初透磁率μｉが得られない場合がある。ＭｎはＭｎフェライト［Ｆｅ２Ｏ３・（Ｍｎ，Ｚｎ）Ｏ］を構成し、それを含むＮｉ系フェライトの保磁力Ｈｃの低減、飽和磁束密度Ｂ４ｋの増加、初透磁率μｉの増加に寄与するが、ＭｎＯとＦｅ２Ｏ３との合計量４８．２０ｍｏｌ％未満あるいは４９．８０ｍｏｌ％超であると、所望の初透磁率μｉ、磁束密度Ｂ４ｋ、保磁力Ｈｃが得られない場合がある。 If the MnO content is 1.20 mol % or less, or more than 4.20 mol %, the desired initial magnetic permeability μi may not be obtained. Mn constitutes Mn ferrite [Fe 2 O 3 (Mn, Zn) O], and contributes to reducing the coercive force Hc, increasing the saturation magnetic flux density B4k, and increasing the initial permeability μi of the Ni-based ferrite containing it. However, if the total amount of MnO and Fe 2 O 3 is less than 48.20 mol % or more than 49.80 mol %, desired initial permeability μi, magnetic flux density B4k and coercive force Hc may not be obtained.
またＮｉＯは残部であって、好ましくは１１．０ｍｏｌ％以上１７．８ｍｏｌ％以下である。さらに好ましくは、ＮｉＯは１２．０ｍｏｌ％以上であり、１３．０ｍｏｌ％以上であるのがいっそう好ましい。また１６．０ｍｏｌ％以下が好ましく、さらに好ましくは１５．０ｍｏｌ％以下である。 NiO is the balance, and is preferably 11.0 mol % or more and 17.8 mol % or less. More preferably, NiO is 12.0 mol % or more, and more preferably 13.0 mol % or more. Also, it is preferably 16.0 mol % or less, more preferably 15.0 mol % or less.
各成分の定量は、蛍光Ｘ線分析及びＩＣＰ発光分光分析により行うことができる。予め蛍光Ｘ線分析により含有元素の定性分析を行い、次に含有元素を標準サンプルと比較する検量線法により定量する。 Quantification of each component can be performed by fluorescent X-ray analysis and ICP emission spectroscopic analysis. A qualitative analysis of contained elements is performed in advance by fluorescent X-ray analysis, and then the contained elements are quantified by a calibration curve method in which the contained elements are compared with a standard sample.
（Ｂ）Ｎｉ系フェライトの製造方法
Ｆｅ２Ｏ３、ＺｎＯ、ＣｕＯ、ＭｎＯ及びＮｉＯを所定割合で湿式混合した後、乾燥し、８００～１０００℃で仮焼成してスピネル化した仮焼粉とするのが好ましい。得られた仮焼粉をイオン交換水とともにボールミルに投入し、平均粉砕粒径（空気透過法）が１．７～２．１μｍとなるまで粉砕してスラリーとすれば良い。得られたスラリーにバインダとしてポリビニルアルコールを加え、スプレードライヤーにて顆粒化した後、加圧成形して所定形状の成形体を得ることが出来る。
(B) Method for producing Ni-based ferrite Fe 2 O 3 , ZnO, CuO, MnO and NiO are wet-mixed at a predetermined ratio, dried, and calcined at 800 to 1000° C. to obtain a spinelized calcined powder. is preferred. The calcined powder thus obtained is put into a ball mill together with ion-exchanged water, and pulverized to an average pulverized particle size (by air permeation method) of 1.7 to 2.1 μm to form a slurry. Polyvinyl alcohol is added as a binder to the obtained slurry, granulated with a spray dryer, and then pressure-molded to obtain a molded body having a predetermined shape.
得られた成形体を焼成炉にて焼結してＮｉ系フェライト（磁心）を得る。焼成工程は昇温工程と、高温保持工程と、降温工程とを有する。焼成工程における雰囲気は、不活性ガス雰囲気でも良いし大気雰囲気でも構わない。ここで、成形体は昇温工程を経て、高温保持工程の設定された高温温度に到達し、焼結される。この高温保持工程において、焼成炉の設定温度は１０５０～１２００℃とするのが好ましい。温度が１０５０℃未満であると焼結が不十分で、初透磁率μｉが小さく、磁心の強度が得られない場合がある。また温度が１２００℃超であると焼結が過剰となり、また焼成炉のエネルギー消費も多くなって製造コストの上昇を招くため好ましくない。 The molded body thus obtained is sintered in a sintering furnace to obtain a Ni-based ferrite (magnetic core). The firing process includes a temperature raising process, a high temperature holding process, and a temperature lowering process. The atmosphere in the firing step may be an inert gas atmosphere or an air atmosphere. Here, the compact is sintered after reaching the high temperature set in the high temperature holding step through the temperature raising step. In this high-temperature holding step, the set temperature of the firing furnace is preferably 1050 to 1200.degree. If the temperature is less than 1050° C., the sintering may be insufficient, the initial magnetic permeability μi may be small, and the strength of the magnetic core may not be obtained. On the other hand, if the temperature exceeds 1200° C., the sintering will be excessive, and the energy consumption of the firing furnace will increase, resulting in an increase in manufacturing cost, which is not preferable.
本発明を以下の実施例によりさらに詳細に説明するが、本発明はそれらに限定されるものではない。 The present invention will be explained in more detail by the following examples, but the invention is not limited thereto.
本実施形態のＮｉ系フェライトの磁心を製造する場合、Ｆｅ２Ｏ３、ＺｎＯ、ＣｕＯ、ＭｎＯびＮｉＯの各成分が表１に示す割合となるように、素原料を湿式混合した後、乾燥し９００℃で１時間仮焼成した。得られた仮焼粉をイオン交換水とともにボールミルに投入し、平均粉砕粒径が１．９μｍとなるまで粉砕してスラリーとした。得られたスラリーにバインダとしてポリビニルアルコールを加え、スプレードライヤーにて顆粒化した後、加圧成形してリング状の成形体を得た。 When manufacturing the Ni-based ferrite magnetic core of the present embodiment, the raw materials are wet-mixed so that the respective components of Fe 2 O 3 , ZnO, CuO, MnO, and NiO have the proportions shown in Table 1, and then dried. Temporarily calcined at 900° C. for 1 hour. The obtained calcined powder was put into a ball mill together with ion-exchanged water, and pulverized to an average pulverized particle diameter of 1.9 μm to obtain a slurry. Polyvinyl alcohol was added as a binder to the resulting slurry, which was then granulated with a spray dryer and pressure-molded to obtain a ring-shaped compact.
得られた成形体を焼成炉にて大気中、１１２０℃で２時間保持して焼結し、外径３０ｍｍ×内径２０ｍｍ×高さ１０ｍｍの円環状の磁心を得た。 The compact thus obtained was sintered in a sintering furnace in the air at 1120° C. for 2 hours to obtain an annular magnetic core with an outer diameter of 30 mm×an inner diameter of 20 mm×height of 10 mm.
各磁心の初透磁率μｉ、磁束密度Ｂ４ｋ、保磁力Ｈｃ、焼結体密度ｄｓを、下記の方法により測定した。
（１）初透磁率μｉ
磁心を被測定物とし、導線を２０ターン巻回して測定試料（コイル部品）とし、ＬＣＲメータ（アジレント・テクノロジー株式会社製４２８５Ａ）により、恒温槽内にて温度２０℃、周波数１００ｋＨｚ、１ｍＡの電流で測定したインダクタンスから次式により求めた。
初透磁率μｉ＝（ｌｅ×Ｌ）／（μ０×Ａｅ×Ｎ２）
（ｌｅ：磁路長、Ｌ：試料のインダクタンス（Ｈ）、μ０：真空の透磁率＝４π×１０－７（Ｈ／ｍ）、Ａｅ：磁心の断面積、Ｎ：導線の巻数）
The initial magnetic permeability μi, magnetic flux density B4k, coercive force Hc, and sintered body density ds of each magnetic core were measured by the following methods.
(1) Initial permeability μi
A magnetic core is used as an object to be measured, and a conducting wire is wound for 20 turns to obtain a measurement sample (coil component). It was obtained from the inductance measured by the following equation.
Initial permeability μi = (le × L) / (μ 0 × Ae × N 2 )
(le: magnetic path length, L: sample inductance (H), μ 0 : magnetic permeability in vacuum = 4π × 10 -7 (H/m), Ae: cross-sectional area of magnetic core, N: number of turns of conducting wire)
（２）磁束密度Ｂ４ｋ、保磁力Ｈｃ
磁束密度（Ｂ４ｋ）および保磁力（Ｈｃ）は、一次側巻線と二次側巻線とをそれぞれ４０回巻回した磁心に、４ｋＡ／ｍの磁界を印加し、直流磁化測定試験装置（メトロン技研株式会社製ＳＫ－１１０型）を用いて２０℃、１００℃において測定した。
(2) Magnetic flux density B4k, coercive force Hc
Magnetic flux density (B4k) and coercive force (Hc) were measured by applying a magnetic field of 4 kA/m to a magnetic core with 40 turns of primary winding and secondary winding, and using a DC magnetization measurement tester (Metron It was measured at 20° C. and 100° C. using SK-110 type manufactured by Giken Co., Ltd.).
（３）焼結体密度ｄｓ
アルキメデスの原理を利用し、水中置換法により焼結体密度を算出した。
(3) Sintered compact density ds
The density of the sintered body was calculated by the water substitution method using Archimedes' principle.
得られた結果を表２に纏めて示す。また図１にＦｅ２Ｏ３のモル量とＭｎＯのモル量との合計量と２０℃及び１００℃における保磁力Ｈｃとの関係を示し、図２にＦｅ２Ｏ３のモル量とＭｎＯのモル量との合計量と印加磁界４ｋＡ／ｍで２０℃における磁束密度Ｂ４ｋとの関係を示し、図３にＦｅ２Ｏ３のモル量とＭｎＯのモル量との合計量と印加磁界４ｋＡ／ｍで１００℃における磁束密度Ｂ４ｋとの関係を示し、図４にＦｅ２Ｏ３のモル量とＭｎＯのモル量との合計量と初透磁率μｉとの関係を示す。
The obtained results are summarized in Table 2. FIG. 1 shows the relationship between the total amount of Fe 2 O 3 and MnO and the
Ｎｏ．１＊～７の磁心を使用した試料では、密度ｄｓが何れも５．２０×１０３ｋｇ／ｍ３を超えていた。実施例のＮｏ．４～７の磁心では、初透磁率μｉが６００以上で、保磁力Ｈｃが５０Ａ／ｍ未満で、印加磁界４ｋＡ／ｍ における磁束密度Ｂ４ｋが３６０ｍＴ以上であった。このような本発明のＮｉ系フェライトを使用したコイル部品は、小型を図ることが出来る。
No. All the samples using magnetic cores of 1* to 7 had a density ds exceeding 5.20×10 3 kg/m 3 . Example No. The magnetic cores of No. 4 to No. 7 had an initial permeability μi of 600 or more, a coercive force Hc of less than 50 A/m, and a magnetic flux density B4k of 360 mT or more in an applied magnetic field of 4 kA/m 2 . A coil component using such a Ni-based ferrite of the present invention can be miniaturized.
Claims (3)
前記Ｎｉ系フェライトの成分組成が、４５．５ｍｏｌ％以上４７．０ｍｏｌ％以下のＦｅ２Ｏ３、２８．０ｍｏｌ％以上３０．０ｍｏｌ％以下のＺｎＯ、７．５ｍｏｌ％以上９．０ｍｏｌ％以下のＣｕＯ、１．２ｍｏｌ％超４．２ｍｏｌ％以下のＭｎＯ、及び残部ＮｉＯとして表され、Ｆｅ２Ｏ３とＭｎＯとの合計量が、４８．２ｍｏｌ％超４９．８ｍｏｌ％以下であるＮｉ系フェライト。 A Ni-based ferrite having an initial magnetic permeability μi at 20° C. of 600 or more, a coercive force Hc of less than 50 A/m, and a magnetic flux density B4k of 360 mT or more in an applied magnetic field of 4 kA/m,
The component composition of the Ni-based ferrite is 45.5 mol% or more and 47.0 mol% or less of Fe 2 O 3 , 28.0 mol% or more and 30.0 mol% or less of ZnO, and 7.5 mol% or more and 9.0 mol% or less of CuO. , more than 1.2 mol % and less than or equal to 4.2 mol % MnO, and the balance NiO, wherein the total amount of Fe 2 O 3 and MnO is more than 48.2 mol % and less than or equal to 49.8 mol %.
Ｆｅ２Ｏ３とＭｎＯとの合計量が４８．５ｍｏｌ％以上で、２０℃での初透磁率μｉが６５０以上であり、密度が５．２０×１０３ｋｇ／ｍ３超のＮｉ系フェライト。 The Ni-based ferrite according to claim 1,
Ni-based ferrite having a total content of Fe 2 O 3 and MnO of 48.5 mol % or more, an initial magnetic permeability μi at 20° C. of 650 or more, and a density of more than 5.20×10 3 kg/m 3 .
前記コイル部品は、コイルと、前記コイルの磁路に配置される前記Ｎｉ系フェライトで構成された磁心とを含むコイル部品。
A coil component using the Ni-based ferrite according to claim 1 or 2,
The coil component includes a coil and a magnetic core made of the Ni-based ferrite arranged in the magnetic path of the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019051780A JP7238511B2 (en) | 2019-03-19 | 2019-03-19 | Ni-based ferrite and coil parts using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019051780A JP7238511B2 (en) | 2019-03-19 | 2019-03-19 | Ni-based ferrite and coil parts using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2020152603A JP2020152603A (en) | 2020-09-24 |
| JP7238511B2 true JP7238511B2 (en) | 2023-03-14 |
Family
ID=72557692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019051780A Active JP7238511B2 (en) | 2019-03-19 | 2019-03-19 | Ni-based ferrite and coil parts using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP7238511B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7259822B2 (en) * | 2020-09-29 | 2023-04-18 | 株式会社村田製作所 | Ferrite sintered body and coil parts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587193A (en) | 2004-08-19 | 2005-03-02 | 浙江大学 | Low temperature coefficient, low loss and high saturated flux density ferrite material and preparing method |
| JP2006151743A (en) | 2004-11-29 | 2006-06-15 | Tdk Corp | Ferrite material and electronic component using it |
| JP2006193343A (en) | 2005-01-11 | 2006-07-27 | Hitachi Metals Ltd | Ferrite sintered body and electronic component using the same |
| JP2006282437A (en) | 2005-03-31 | 2006-10-19 | Tdk Corp | Ferrite sintered compact, method for manufacturing the same, and coil component |
| JP2014169194A (en) | 2013-03-01 | 2014-09-18 | Hitachi Metals Ltd | Mn-Zn FERRITE AND COIL COMPONENT USING THE SAME |
| JP2015043459A (en) | 2011-06-15 | 2015-03-05 | 株式会社村田製作所 | Multilayer coil component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2550639B2 (en) * | 1988-02-17 | 1996-11-06 | 三菱電機株式会社 | High resistivity low loss oxide magnetic material |
-
2019
- 2019-03-19 JP JP2019051780A patent/JP7238511B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587193A (en) | 2004-08-19 | 2005-03-02 | 浙江大学 | Low temperature coefficient, low loss and high saturated flux density ferrite material and preparing method |
| JP2006151743A (en) | 2004-11-29 | 2006-06-15 | Tdk Corp | Ferrite material and electronic component using it |
| JP2006193343A (en) | 2005-01-11 | 2006-07-27 | Hitachi Metals Ltd | Ferrite sintered body and electronic component using the same |
| JP2006282437A (en) | 2005-03-31 | 2006-10-19 | Tdk Corp | Ferrite sintered compact, method for manufacturing the same, and coil component |
| JP2015043459A (en) | 2011-06-15 | 2015-03-05 | 株式会社村田製作所 | Multilayer coil component |
| JP2014169194A (en) | 2013-03-01 | 2014-09-18 | Hitachi Metals Ltd | Mn-Zn FERRITE AND COIL COMPONENT USING THE SAME |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020152603A (en) | 2020-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102155356B1 (en) | Ferrite composition and electronic device | |
| TW504712B (en) | Manganese-zinc (Mn-Zn) based ferrite | |
| JP6740817B2 (en) | Ferrite composition, ferrite sintered body, electronic component and chip coil | |
| JP5880517B2 (en) | Ferrite composition and electronic component | |
| US11373789B2 (en) | Ferrite sintered body and electronic component using thereof | |
| JP3584439B2 (en) | Mn-Zn ferrite and method for producing the same | |
| JP3588693B2 (en) | Mn-Zn ferrite and method for producing the same | |
| JP7238511B2 (en) | Ni-based ferrite and coil parts using the same | |
| JP2005132715A (en) | Ni-Cu-Zn SYSTEM FERRITE MATERIAL AND ITS MANUFACTURING METHOD | |
| JP5871017B2 (en) | Wire-wound coil component having a magnetic material and a core formed using the same | |
| JP7219875B2 (en) | NiZn ferrite | |
| JP2022145508A (en) | NiZn-BASED FERRITE | |
| JP7045636B2 (en) | Magnetic core using NiZn-based ferrite | |
| JP5882811B2 (en) | Ferrite sintered body and pulse transformer core comprising the same | |
| JP7262372B2 (en) | Granulated powder for NiCuZn ferrite and NiCuZn ferrite | |
| JP2006232647A (en) | Ni-Cu-Zn-BASED FERRITE MATERIAL AND ITS PRODUCTION METHOD | |
| WO2002054419A1 (en) | Oxide magnetic material exhibiting low magnetic loss | |
| JP6322987B2 (en) | Ferrite composition, ferrite core and electronic component | |
| JP7338183B2 (en) | Ni-based ferrite and coil parts using the same | |
| JP4799808B2 (en) | Ferrite composition, magnetic core and electronic component | |
| JP7117447B1 (en) | Method for producing zirconia setter and MnZn ferrite | |
| JP2002246222A (en) | Oxide magnetic material and coil part using the same | |
| WO2023182133A1 (en) | MnZn-BASED FERRITE | |
| JP5212305B2 (en) | Magnetic material and coil parts using it | |
| JP5580961B2 (en) | Oxidized magnetic material and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20220214 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20221216 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20230131 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20230213 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 7238511 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |