JPH03242907A - Ferrite core for deflection yoke and manufacture thereof - Google Patents
Ferrite core for deflection yoke and manufacture thereofInfo
- Publication number
- JPH03242907A JPH03242907A JP9038490A JP3849090A JPH03242907A JP H03242907 A JPH03242907 A JP H03242907A JP 9038490 A JP9038490 A JP 9038490A JP 3849090 A JP3849090 A JP 3849090A JP H03242907 A JPH03242907 A JP H03242907A
- Authority
- JP
- Japan
- Prior art keywords
- core
- ferrite
- deflection yoke
- mol
- layer
- 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
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 abstract description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 230000006866 deterioration Effects 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 239000000843 powder Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- -1 Furthermore Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910020472 SiO7 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は電磁偏向型ブラウン管の偏向コークコアに用い
るフェライト磁心及びその製造方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a ferrite magnetic core used in a deflection coke core of an electromagnetic deflection type cathode ray tube and a method for manufacturing the same.
〈従来の技術〉
従来、ＣＲＴ （ブラウン管）用偏向ヨークコイルのコ
アには、フェライト焼結体が使用されている。磁心に使
用されるフェライト焼結体には、その材質により、高電
気抵抗のものと低電気抵抗のものがあり、ＣＲＴの用途
によって使い分けられている。<Prior Art> Conventionally, a ferrite sintered body has been used for the core of a deflection yoke coil for a CRT (cathode ray tube). Ferrite sintered bodies used for magnetic cores are classified into high electrical resistance and low electrical resistance depending on the material, and are used depending on the purpose of the CRT.
現在、主流となっているのは、高電気抵抗を有するＭｎ
−Ｍｇ−Ｚｎ系フェライトである。この稲のフェライト
は、比誘電率が低く （１０’ −１０” ）かつ高抵
抗（１０６〜１０９Ω・印）であり、垂直巻線をコアに
直接巻くことができるため、民生用テレビ（水平偏向周
波数約１６ｋｌｌｚ）の偏向ヨーク用フェライトとして
広く使用されている。Currently, the mainstream is Mn, which has high electrical resistance.
-Mg-Zn ferrite. This rice ferrite has a low dielectric constant (10' - 10") and high resistance (106 to 109 Ω), and vertical windings can be wound directly on the core, making it suitable for consumer televisions (horizontal polarization). It is widely used as a ferrite for deflection yokes with a frequency of about 16kllz).
ところが、近年ＯＡやＣＡＤ／ＣＡＭ等の普及により、
より高精細なデイスプレィ用のＣＲＴの需要が増加して
いる。それらのＣＲＴは、水平偏向周波数が高い（３２
〜１３０ｋｌｌｚ）ため、この種のフェライトでは、磁
気損失（鉄損）の値が大きくなり発熱が大きくなるとい
う欠点があった。However, with the spread of OA, CAD/CAM, etc. in recent years,
Demand for CRTs for higher definition displays is increasing. Those CRTs have a high horizontal deflection frequency (32
130 kllz), this type of ferrite has the drawback that the value of magnetic loss (iron loss) increases and heat generation increases.
一方、磁気損失に優れたフェライ１−として、ＭｎＺｎ
フェライトが知られている。このＩｔ ’Ｊｆは、鉄損
だけでなく透磁率、飽和磁束密度といった磁気特性全般
に優れており、高周波での使用において発熱の問題は起
こらない。しかし、一方で抵抗が低いため、絶縁を良く
しな番ノればコアに直接巻線を施すことが不可能である
。On the other hand, as a ferrite 1- with excellent magnetic loss, MnZn
Ferrite is known. This It'Jf has excellent overall magnetic properties such as not only iron loss but also magnetic permeability and saturation magnetic flux density, and does not cause heat generation problems when used at high frequencies. However, since the resistance is low, it is impossible to wind the core directly unless the insulation is good.
この対策として、従来、プラスチックの枠を取り付け、
それに巻線を行う方法も採用されている。As a countermeasure to this, conventionally, a plastic frame was attached,
A winding method is also used.
また、高温酸化雰囲気中で酸化し、高電気抵抗層を形成
させる方法（特開昭６１−１５９７７８号公報、特開昭
６１−１９３４０４号公報）も提案されている。Furthermore, a method of forming a high electrical resistance layer by oxidizing in a high temperature oxidizing atmosphere has also been proposed (Japanese Patent Application Laid-open No. 159778/1983 and Japanese Patent Application Laid-open No. 193404/1983).
しかし、前者はプラスチックの枠を新たに作製し、フェ
ライトコアに取り付ける２次的な加工が必要であり、ま
た枠を取り付けるため偏向ヨーク部に、ＳｉＯ７層を設
？Ｊたことを特徴とする偏向ヨーク用フェライトコアで
あり、また主成分として、ＭｎＯ：３１〜３８モル％、
ＺｎＯ： ８〜１５モル％及びＦｅ２Ｏ３： ５２．
５〜５４．０モル％からなるフェライトコアを焼成し、
次いでその表層部にＳｉＯ□層をドライコーティングす
ることを特徴とする偏向ヨーク用フェライトコアの製造
方法である。However, the former method requires the creation of a new plastic frame and secondary processing to attach it to the ferrite core.Also, in order to attach the frame, a SiO7 layer is added to the deflection yoke. This is a ferrite core for a deflection yoke, which is characterized by a J-type ferrite core, and also contains MnO: 31 to 38 mol% as a main component.
ZnO: 8-15 mol% and Fe2O3: 52.
Sintering a ferrite core consisting of 5 to 54.0 mol%,
This method of manufacturing a ferrite core for a deflection yoke is characterized in that the surface layer of the ferrite core is then dry-coated with a SiO□ layer.
〈作 用〉
Ｍｎ−Ｚｎフェライトは、磁気損失の優れたフェライト
としてよく知られている。本発明では偏向ヨークコアに
このＭｎ −Ｚｎフェライトを採用した。この場合、コ
アの発熱を低く抑えるためには、ＭｎＺｎフェライトの
磁気損失はできるだけ低いことが望ましい。第１図は、
副成分として５ｉ０２を０．０１〜０．０３重景％、Ｃ
ａＯを０．０１５〜０．０８重景％添加した種々の組成
のＭｎ−Ｚｎフェライトの＋００“Ｃごの高周波鉄損（
１００ｋＨｚ、２０ｍＴ）をＦｅ２０ｓ、ＭｎＯ，Ｚｎ
Ｏの三元状態図上に図示したものである。各点の数字は
＋ｎＷ／ｃＪの単位で表した鉄損値である。この図から
ＩＯ００ｍＷ／ｃ＋ｆｌ以下の低鉄用を確保するには、
本体が大型となってしまうという欠点がある。<Function> Mn-Zn ferrite is well known as a ferrite with excellent magnetic loss. In the present invention, this Mn-Zn ferrite is used for the deflection yoke core. In this case, in order to suppress heat generation in the core, it is desirable that the magnetic loss of the MnZn ferrite be as low as possible. Figure 1 shows
0.01-0.03 5i02 as a subcomponent, C
High frequency iron loss (
100kHz, 20mT) with Fe20s, MnO, Zn
This is illustrated on the ternary phase diagram of O. The number at each point is the iron loss value expressed in +nW/cJ. From this figure, to ensure low iron use below IO00mW/c+fl,
The disadvantage is that the main body is large.
方、後者の方法によると、２次的な加工は省略できるも
のの、高電気抵抗層を安定に形成することが難しい。即
ち、酸化性雰囲気で酸化する方法では高電気抵抗層の厚
みを一定にすることが難しく、絶縁不良が生し易い。ま
た酸化性雰囲気中で熱処理を行うと、Ｆｅ”が欠乏しが
ちとなり、鉄損値の悪化が容易に起こる。On the other hand, according to the latter method, although secondary processing can be omitted, it is difficult to stably form a high electrical resistance layer. That is, in the method of oxidizing in an oxidizing atmosphere, it is difficult to make the thickness of the high electrical resistance layer constant, and insulation defects are likely to occur. Furthermore, when heat treatment is performed in an oxidizing atmosphere, Fe'' tends to be depleted and the iron loss value easily deteriorates.
〈発明が解決しようとする課題〉
本発明の目的は、
（１）表面抵抗が高く、偏向ヨークコア製造時に直接巻
線ができ、かつ
（２） コアの磁気損失が少なく、偏向ヨークコアと
しての使用時発熱の問題が起こらない、偏向ヨーク用フ
ェライトコア及びその製造方法を提供することである。<Problems to be Solved by the Invention> The objects of the present invention are as follows: (1) The surface resistance is high, allowing direct winding during the manufacture of the deflection yoke core, and (2) The magnetic loss of the core is low, and when used as a deflection yoke core. It is an object of the present invention to provide a ferrite core for a deflection yoke and a method for manufacturing the same, which does not cause the problem of heat generation.
〈課題を解決するための手段〉
本発明は、主成分として、ＭｎＯ： ３１〜３８モル％
、ＺｎＯ： ８−１５モル％及びＦｅｚＯ１： ５２
．５〜５４．０モル％からなる焼成した低鉄損フェライ
トコアの表層ＦｅｚＯ７二５２．５〜５４．０モル％、
ＭｎＯ： ３１〜３８モル％、ＺｎＯ：８〜１５モル
％の範囲に組成を調整することが必要であり、本発明に
おいてはコアとして使用するＭｎ Ｚｎフェライトの
組成を上記範囲に限定する。第１図では副成分としてＳ
ｉＯ２、ＣａＯを添加した材質の例を示したが、これに
加えて低鉄損化に有効とされる公知の添加物、例えばＴ
ｉ、 Ｚｒ、 Ｎｂ、Ｖ、Ｃｏ等の酸化物を添加しても
良い。なお、副成分の好ましい添加量も公知であり、例
えば５ｉ０２は０．０１〜０．０３ｗｔ％、ＣａＯは０
．０１５〜０．０８ｉｖｔ％である。<Means for Solving the Problems> The present invention contains MnO: 31 to 38 mol% as a main component.
, ZnO: 8-15 mol% and FezO1: 52
．． The surface layer FezO7 of the fired low core loss ferrite core consisting of 5 to 54.0 mol%, 52.5 to 54.0 mol%;
It is necessary to adjust the composition to a range of MnO: 31 to 38 mol% and ZnO: 8 to 15 mol%, and in the present invention, the composition of the MnZn ferrite used as the core is limited to the above range. In Figure 1, S is the subcomponent.
Examples of materials added with iO2 and CaO are shown, but in addition to these, known additives that are effective in reducing iron loss, such as T
Oxides such as i, Zr, Nb, V, and Co may be added. Note that the preferable addition amounts of subcomponents are also known, for example, 5i02 is 0.01 to 0.03 wt%, CaO is 0.
．． 015-0.08 ivt%.
本発明は、主成分として鉄損の低いＭｎ−Ｚｎフェライ
トを用い、その表層部に５ｉ０２層を設けた偏向ヨーク
用フ玉ライトコア及びＳｉＯ□層のコーティングにドラ
イコーティング法を採用した製造方法に関するものであ
るが、以下にその作用・効果を説明する。The present invention relates to a flat light core for a deflection yoke that uses Mn-Zn ferrite with low iron loss as the main component and has a 5i02 layer on its surface layer, and a manufacturing method that uses a dry coating method to coat the SiO□ layer. However, its functions and effects will be explained below.
コアを構成するＭｎ −Ｚｎフェライトは、まず従来公
知のフェライト製造方法により、即ち原料の混合、仮焼
、粉砕の工程によって約１．１ｐｍの均質な粉末粒子と
する。次に、これらの粉末粒子にＰ■Ａ（ポリビニルア
ルコール）等のバインダーを加えて造粒後、金型へ充填
した後、プレス底形し、所定寸法のコアを作製する。成
形されたコアは１２００〜１３５０’ｃの温度で焼成し
て、焼結フェライトコアを得る。The Mn-Zn ferrite constituting the core is first made into homogeneous powder particles of about 1.1 pm by a conventionally known ferrite manufacturing method, that is, by mixing raw materials, calcining, and pulverizing steps. Next, a binder such as PA (polyvinyl alcohol) is added to these powder particles, and after granulation, the granules are filled into a mold, which is then press-bottom-shaped to produce a core of a predetermined size. The shaped core is fired at a temperature of 1200-1350'c to obtain a sintered ferrite core.
以上のようにして得られたフェライトコアに５ｉ（ｈｊ
ｔ！Ｊを形成する。ＳｉＯ□の形成方法としては水ガラ
ス等を塗布乾燥して焼付ける方法、あるいはドライコー
ティングする方法等があるが、ＳｉＯ□層を拡散させず
に形成できる点からドライコーティング法が優れている
。ドライコーティング技術には、イオンブレーティング
（ＩＰ）、スパッタリング（ｓｐ）、プラダ７ＣＶＤ
（Ｐ−ＣＶＤ）等があるが、真空度、Ｉｔｉ膜速度等よ
り、ＳｉＯ□のコーティングにはＰ−ＣＶＤが最も適し
ている。いずれの方法においてもＳｉ０１層の膜厚は０
．５ｔｔ１１以上であれば十分絶縁性が確保できる。5i (hj
T! Form J. Methods for forming SiO□ include a method of applying water glass or the like, drying and baking, or a method of dry coating, but the dry coating method is superior in that it can form the SiO□ layer without diffusing it. Dry coating techniques include ion blasting (IP), sputtering (sp), and Prada 7CVD.
(P-CVD), etc., but P-CVD is most suitable for coating SiO□ in terms of vacuum degree, Iti film speed, etc. In either method, the thickness of the Si01 layer is 0.
．． If it is 5tt11 or more, sufficient insulation can be ensured.
このような方法によれば、コアの特性を劣化せずに高抵
抗層を安定に形成することができるため、コアの直接巻
線が可能となる。According to such a method, a high resistance layer can be stably formed without deteriorating the characteristics of the core, so that direct winding of the core becomes possible.
料と、行わない試料の接触電気抵抗を調べたものを示す
。ＳｉＯ□コーティングを行った試料が行わない試料に
比べ約１０７倍もの高い電気絶縁性を示すことがわかる
。なお、ＳｉＯ□コーティングの有無による磁気特性の
差は特になかった。The results are shown below for the contact electrical resistance of samples with and without the test. It can be seen that the sample coated with SiO□ exhibits about 107 times higher electrical insulation than the sample without coating. Note that there was no particular difference in magnetic properties depending on the presence or absence of SiO□ coating.
表１
〈発明の効果〉
以上のように、本発明では、低鉄損フェライトの表層部
に５ｉＯｚＮがコーティングされているため、磁気特性
を低下させることなく表面の電気抵抗の高いフェライト
を得ることができる。このため、コアに直接巻線するこ
とが可能となり、低損失偏向ヨーク用フェライトコアが
容易に得られる。Table 1 <Effects of the Invention> As described above, in the present invention, since the surface layer of the low core loss ferrite is coated with 5iOzN, it is possible to obtain a ferrite with high surface electrical resistance without deteriorating the magnetic properties. can. Therefore, it becomes possible to wind the wire directly on the core, and a ferrite core for a low-loss deflection yoke can be easily obtained.
第１図は種々の組成Ｍｎ −Ｚｎフェライトの１００°
Ｃでの高周波鉄ｔＮ （１００ｋｌｌｚ、 ２００ｍ
Ｔ）をＦｅ、０１、Ｍｎ０１ＺｎＯの三元状態図上に示
したものである。
次に実施例によって本発明をさらに詳細に説明する。
〈実施例〉
ＦｅｚＯ，、４５３モル％、 ＭｎＯ： ３５モル％、
ＺｎＯ： １２モル％粉末を配合して混合したのち、
さらにＣａＯ： ０．０７ｗｔ％、ＳｉＯア： ０．０
１５ｗｔ％粉末を添加混合した原料粉末を仮焼（９００
℃×２Ｈ）後、アトライターにより湿式粉砕を行い、平
均粒径約１．１−の粉末粒子とした。この後、ＰＶＡを
添加し、造粒後成形圧力１．５ｔ／ｃ−で外径８５ｍｍ
、内径４２ｍｍ、厚さ１２ｍｍのトロイダルコアに成形
した。次に１３３０’ＣＸ３ｈｒ、酸素濃度を制御した
窒素中にて焼成した。
焼成した試料にＰ−ＣＶＤ装置にて５ｉＯＪＩ４を０．
５〜１．Ｏｔｔｎとなるように均一にコーティングした
。
このようにして得られた試料のＳｉ０ｇコーテイング膜
は耐摩耗性、耐食性、電気絶縁性とも良好であり、フェ
ライトコアに十分直接巻線が可能であった。
表１に本実施例のＳｉ０ｇコーティングを行った試８−Figure 1 shows 100° of Mn-Zn ferrite with various compositions.
High frequency iron tN (100kllz, 200m
T) is shown on a ternary phase diagram of Fe, 01, Mn01ZnO. Next, the present invention will be explained in more detail with reference to Examples. <Example> FezO, 453 mol%, MnO: 35 mol%,
ZnO: After blending and mixing 12 mol% powder,
Furthermore, CaO: 0.07wt%, SiO: 0.0
The raw material powder mixed with 15 wt% powder was calcined (900
℃ x 2 hours), wet pulverization was performed using an attritor to obtain powder particles with an average particle size of about 1.1-. After that, PVA was added, and after granulation, the outer diameter was 85 mm at a molding pressure of 1.5 t/c-.
, was molded into a toroidal core with an inner diameter of 42 mm and a thickness of 12 mm. Next, it was fired at 1330'CX for 3 hours in nitrogen with controlled oxygen concentration. 0.5iOJI4 was added to the fired sample using a P-CVD device.
5-1. It was coated uniformly so as to give Ottn. The SiOg coating film of the sample thus obtained had good wear resistance, corrosion resistance, and electrical insulation properties, and could be sufficiently directly wound on the ferrite core. Table 1 shows trial 8- with Si0g coating of this example.
Claims (2)
成した低鉄損フェライトコアの表層部に、ＳｉＯ＿２層
を設けたことを特徴とする偏向ヨーク用フェライトコア
。1. A SiO_2 layer was provided on the surface layer of a fired low iron loss ferrite core consisting of MnO: 31 to 38 mol%, ZnO: 8 to 15 mol%, and Fe_2O_3: 52.5 to 54.0 mol% as main components. A ferrite core for a deflection yoke.
ェライトコアを焼成し、次いでその表層部にＳｉＯ＿２
層をドライコーティングすることを特徴とする偏向ヨー
ク用フェライトコアの製造方法。2. A ferrite core consisting of MnO: 31 to 38 mol%, ZnO: 8 to 15 mol%, and Fe_2O_3: 52.5 to 54.0 mol% as main components is fired, and then SiO_2 is added to the surface layer.
A method for manufacturing a ferrite core for a deflection yoke, characterized by dry coating a layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9038490A JPH03242907A (en) | 1990-02-21 | 1990-02-21 | Ferrite core for deflection yoke and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9038490A JPH03242907A (en) | 1990-02-21 | 1990-02-21 | Ferrite core for deflection yoke and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03242907A true JPH03242907A (en) | 1991-10-29 |
Family
ID=12526706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9038490A Pending JPH03242907A (en) | 1990-02-21 | 1990-02-21 | Ferrite core for deflection yoke and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03242907A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998032140A1 (en) * | 1997-01-21 | 1998-07-23 | Fdk Corporation | Ferrite material, method of manufacturing the same and deflection yoke core made from the material |
| JP2011003637A (en) * | 2009-06-17 | 2011-01-06 | Tdk Corp | Coil part |
| JP2011014730A (en) * | 2009-07-02 | 2011-01-20 | Tdk Corp | Coil component |
| US8164409B2 (en) | 2009-07-02 | 2012-04-24 | Tdk Corporation | Coil component |
-
1990
- 1990-02-21 JP JP9038490A patent/JPH03242907A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998032140A1 (en) * | 1997-01-21 | 1998-07-23 | Fdk Corporation | Ferrite material, method of manufacturing the same and deflection yoke core made from the material |
| JP2011003637A (en) * | 2009-06-17 | 2011-01-06 | Tdk Corp | Coil part |
| US8183969B2 (en) | 2009-06-17 | 2012-05-22 | Tdk Corporation | Coil component |
| JP2011014730A (en) * | 2009-07-02 | 2011-01-20 | Tdk Corp | Coil component |
| US8164409B2 (en) | 2009-07-02 | 2012-04-24 | Tdk Corporation | Coil component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107311637B (en) | A kind of method that low-power consumption manganese-zinc ferrite is prepared based on nucleocapsid crystal grain | |
| US2579978A (en) | Soft ferromagnetic material and method of making same | |
| JP3108803B2 (en) | Mn-Zn ferrite | |
| JP2917706B2 (en) | Oxide magnetic material | |
| JP3454316B2 (en) | Manganese zinc based ferrite core and method for producing the same | |
| JP3108804B2 (en) | Mn-Zn ferrite | |
| JPH05335132A (en) | Oxide magnetic body material | |
| JPH06310320A (en) | Oxide magnetic substance material | |
| JPH03242907A (en) | Ferrite core for deflection yoke and manufacture thereof | |
| JP6827584B1 (en) | MnZn-based ferrite and its manufacturing method | |
| JP2005330126A (en) | MnZn FERRITE AND METHOD OF MANUFACTURING THE SAME | |
| JP2855990B2 (en) | Oxide magnetic material | |
| JP2000340419A (en) | Manganese zinc system ferrite core and its manufacture | |
| JP2000044249A (en) | MnMgCuZn FERRITE MATERIAL | |
| JPH08148322A (en) | Oxide magnetic material and switching power supply employing the same | |
| JP2022059859A (en) | MnZn BASED FERRITE AND MANUFACTURING METHOD OF SAME | |
| JPH10340807A (en) | Manganese-cobalt ferrite material | |
| JPH10270229A (en) | Mn-ni ferrite material | |
| JP2515183B2 (en) | Method for producing magnesium-zinc ferrite | |
| JPH10270231A (en) | Mn-ni ferrite material | |
| JP7117447B1 (en) | Method for producing zirconia setter and MnZn ferrite | |
| JPS63242931A (en) | Magnesium-zinc ferrite material | |
| JP2000269019A (en) | Ferrite core, production thereof and inductance part | |
| JPH0371603A (en) | Ferrite core for deflection yoke | |
| JPH1022113A (en) | Method for manufacturing low power loss oxide magnetic material |