JPH03248405A - Low-loss ferrite for power supply - Google Patents
Low-loss ferrite for power supplyInfo
- Publication number
- JPH03248405A JPH03248405A JP2048714A JP4871490A JPH03248405A JP H03248405 A JPH03248405 A JP H03248405A JP 2048714 A JP2048714 A JP 2048714A JP 4871490 A JP4871490 A JP 4871490A JP H03248405 A JPH03248405 A JP H03248405A
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- Prior art keywords
- less
- low
- loss
- mno
- zno
- 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.)
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Links
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 23
- 239000000654 additive Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 4
- 229910052681 coesite Inorganic materials 0.000 abstract description 4
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 4
- 229910052682 stishovite Inorganic materials 0.000 abstract description 4
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052905 tridymite Inorganic materials 0.000 abstract description 4
- 239000011230 binding agent Substances 0.000 abstract description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 2
- 235000010216 calcium carbonate Nutrition 0.000 abstract description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 abstract 6
- 239000000470 constituent Substances 0.000 abstract 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- KOAWAWHSMVKCON-UHFFFAOYSA-N 6-[difluoro-(6-pyridin-4-yl-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methyl]quinoline Chemical compound C=1C=C2N=CC=CC2=CC=1C(F)(F)C(N1N=2)=NN=C1C=CC=2C1=CC=NC=C1 KOAWAWHSMVKCON-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 101100481408 Danio rerio tie2 gene Proteins 0.000 description 1
- 101100481410 Mus musculus Tek gene Proteins 0.000 description 1
- 229910019704 Nb2O Inorganic materials 0.000 description 1
- 229910019714 Nb2O3 Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
Landscapes
- Magnetic Ceramics (AREA)
- 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、スイッチング電源の磁心等に用いるのに適し
たＭｎ−Ｚｎ系の低損失フェライトに関するもので、Ｃ
ａｂ、Ｓｉｎ、 、Ｎｂ、Ｏ３，Ｔａ、Ｏｓもしくは、
Ｃａｂ、５ｉ０２、Ｎｂ、Ｏ３，Ｔａ、Ｏｓ ，Ｔｉ
Ｏ、もしくは、Ｃａｂ、Ｓｉｎ、 、Ｎｂ、０． 。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a Mn-Zn-based low-loss ferrite suitable for use in magnetic cores of switching power supplies, etc.
ab, Sin, , Nb, O3, Ta, Os or
Cab, 5i02, Nb, O3, Ta, Os, Ti
O, or Cab, Sin, , Nb, 0. .
Ｔｉｅ、を微量複合添加することにより２５ｋＨｚ〜Ｉ
ＭＨｚにおける電力損失を著しく低減したものである
。25kHz~I by adding a small amount of Tie.
This significantly reduces power loss at MHz.
（従来の技術）
Ｍｎ−Ｚｎ系の低損失フェライトは、各種通信機器、民
生用機器などのトランス用材料に用いられているが、従
来のスイッチング電源用トランスにおいては、スイッチ
ング周波数として専ら２５〜２００ｋＨｚ程度のものが
使用されている。このスイッチング電源用トランスに用
いられる低損失フェライトとしては、副成分として、Ｃ
ａＯ、Ｓｉｎ、 、 Ｖ２Ｏ，を含む、あるいはＣａＯ
Ｈ５ｉｏ２ｔ Ｎｂｚ Ｏｓを含む所望のＭｎ−Ｚｎ系
フェライトが使用されている。例えば、特開昭５８−１
１４４０１号公報。(Prior art) Mn-Zn-based low-loss ferrites are used as materials for transformers in various communication devices, consumer devices, etc., but in conventional transformers for switching power supplies, the switching frequency is exclusively 25 to 200 kHz. A certain amount is used. The low-loss ferrite used in this switching power supply transformer contains C as a subcomponent.
Contains aO, Sin, , V2O, or CaO
Desired Mn-Zn based ferrites including H5io2tNbzOs are used. For example, JP-A-58-1
Publication No. 14401.
（発明が解決しようとする問題点）
近年−、スイッチング電源をさらに小型・軽量化、高周
波化するため、これに使用するフェライト材料としても
、使用周波数領域において、より低損失で、より高磁束
密度の材料が必要不可欠となっている。(Problem to be solved by the invention) In recent years, in order to make switching power supplies even smaller, lighter, and capable of higher frequencies, ferrite materials used for these power supplies have lower loss and higher magnetic flux density in the operating frequency range. materials are indispensable.
しかし、従来のＭｎ−Ｚｎ系フェライトでは、高磁束密
度で、なおかつ低損失の共有を実現することは容易でな
かった。また、数百ｋＨｚ以上の周波数領域では、電力
損失が増大してしまう欠点があった。 本発明は１周波
数２５〜２００ｋＨｚにおいて、あるいは、周波数２０
０ｋＨｚ〜Ｉ ＭＨｚにおいて、高磁束密度で、なおか
つ充分電力損失の少ない電源用低損失フェライトを提供
しようとするものである。However, with conventional Mn--Zn-based ferrites, it has not been easy to achieve high magnetic flux density and low loss sharing. Furthermore, there is a drawback that power loss increases in a frequency range of several hundred kHz or more. The present invention can be applied at a frequency of 25 to 200kHz or at a frequency of 20kHz.
The present invention aims to provide a low-loss ferrite for power supplies that has a high magnetic flux density and sufficiently low power loss in the range from 0 kHz to I MHz.
（問題点を解決するための手段）
本発明は、 Ｆｅ２Ｏ３，ＭｎＯ，Ｚｒ＋０を主成分と
し、副成分として、
１） ＣａＯ２００〜１１０００ｐｐ、Ｓｉ０□５００
ｐｐｍ以下（０を含まず）、Ｎｂ２０５１５００ｐｐ＋
ｍ以下（０を含まず）ｔＴａｚｏｓ １５００ｐｐｍ以
下（０を含まず）
２） ＣａＯ２００〜１ＯＯＯｐｐ＋ｍ、ＳＬ０．５０
０ｐｐ＋ｉ以下（０を含まず）＋Ｎｂ２Ｏ５１５００ｐ
ｐｍ以下（０を含まず）ｌＴａ、０．１５００ρｐ＠以
下（０を含まず）、Ｔ１０１１０００〜２００００ｐρ
−３） ＣａＯ２００〜１１０００ｐｐ、ＳＳ１０２５
００ｐｐ以下（０を含まず）、Ｎｂ、０．１５００ｐｐ
ｍ以下（０を含まず）、ＴｉＯ□１０００〜２００００
ｐｐｍ
を複合添加、含有することにより、２５ｋＨｚ〜Ｉ Ｍ
Ｈｚにおいて、高磁束密度で、なおかつ、充分電力損失
の少ないフェライトを得るものである。(Means for solving the problems) The present invention has Fe2O3, MnO, and Zr+0 as main components, and as subcomponents: 1) CaO200-11000pp, Si0□500
ppm or less (not including 0), Nb2051500pp+
m or less (not including 0) tTazos 1500 ppm or less (not including 0) 2) CaO200~1OOpp+m, SL0.50
0pp+i or less (not including 0)+Nb2O51500p
pm or less (not including 0) lTa, 0.1500ρp@ or less (not including 0), T1011000~20000pρ
-3) CaO200-11000pp, SS1025
00pp or less (not including 0), Nb, 0.1500pp
m or less (not including 0), TiO□1000-20000
By adding and containing ppm in combination, 25kHz to IM
The present invention aims to obtain a ferrite having a high magnetic flux density and sufficiently low power loss at Hz.
（実施例）
以下本発明に関する電源用低損失フェライトの実施例を
説明する。(Example) An example of a low-loss ferrite for power supply according to the present invention will be described below.
（１） Ｆｓｚ０３（５３ｍｏ１％）、Ｍｎ０（３５，
５ｍｏ１％）、Ｚｎ０（１１，５ｍｏ１％）を主成分と
する原料を９００℃にて仮焼成した後。(1) Fsz03 (53mo1%), Mn0 (35,
5 mo1%) and Zn0 (11.5 mo1%) after pre-calcining at 900°C.
副成分として、ＣａＣＯ３を７５０ｐｐｍ（ＣａＯに換
算すると４２０ｐｐｍ） 、５ｉｎ２を５０ｐｐｍ、Ｎ
ｂ、Ｏ，を７００ｐｐｍ，Ｔａ、Ｏ，を１１００ｐｐ複
合添加し、ボールミルにて２時間粉砕した。As subcomponents, 750 ppm of CaCO3 (420 ppm when converted to CaO), 50 ppm of 5in2, N
700 ppm of b, O, and 1100 ppm of Ta and O were added in combination, and the mixture was ground in a ball mill for 2 hours.
但し、Ｃａｂ、Ｓｉｎ、にょうに原料に予め含有されて
いる副成分については、仮焼成後に添加する量をその分
だけ減じ、全体として上記成分の割合に一致する様にし
た。However, for the subcomponents previously contained in the raw materials such as Cab, Sin, and Nyon, the amounts added after pre-calcination were reduced by that amount, so that the overall proportions matched the above-mentioned component proportions.
この粉砕原料を乾燥後、バインダーを１ｗｔ％添加し、
造粒、成形した。この成形体を焼成温度１３００℃、焼
成雰囲気は酸素分圧１％にて５時間焼成した。なお、焼
成体の形状は、外径３０■、内径２０■。After drying this pulverized raw material, 1 wt% of binder was added,
Granulated and molded. This molded body was fired for 5 hours at a firing temperature of 1300° C. and a firing atmosphere of 1% oxygen partial pressure. The shape of the fired body is 30 cm in outer diameter and 20 cm in inner diameter.
高さ１０ＩＩｍのリング状とした。It was made into a ring shape with a height of 10 IIm.
この実施例１と同様の試料作製工程において。In the sample preparation process similar to this Example 1.
添加物条件を変えて各試料を作製した。この結果を第１
表に示す。Each sample was prepared with different additive conditions. This result is the first
Shown in the table.
第
表
試料１〜６，８〜１１は、周波数２５〜２００ｋＨｚに
おいて、電力損失の少ない本発明の実施例であり、試料
７は、添加物としてＣａｂ、Ｓｉｎ、 、Ｎｂ２Ｏ，を
含む従来材の例である。Samples 1 to 6 and 8 to 11 in the table are examples of the present invention with low power loss at frequencies of 25 to 200 kHz, and sample 7 is an example of a conventional material containing Cab, Sin, , Nb2O, as additives. It is.
実施例６の電力損失の温度特性を第１図に、また、電力
損失の周波数特性を第２図に示した。なお、比較例とし
て従来例の電力損失の温度特性及び周波数特性も第１図
及び第２図に示した。The temperature characteristics of power loss in Example 6 are shown in FIG. 1, and the frequency characteristics of power loss are shown in FIG. As a comparative example, the temperature characteristics and frequency characteristics of the power loss of the conventional example are also shown in FIGS. 1 and 2.
第１図より、実施例６の電源用低損失フェライトは、周
波数ｆ＝１００ｋＨｚ、磁束密度Ｂ＋ｉ＝２００ｍＴに
おいて、２０℃〜１２０℃の広温度範囲で電力損失が従
来材の７割程度と、極めて低いことがわかる。また、第
１表に示した様に各実施例の飽和磁束密度は、５１０ｍ
Ｔ以上と非常に高く、このため、第２図に示した様な優
れた電力損失の周波数特性が得られた。From Figure 1, the low-loss ferrite for power supply of Example 6 has an extremely low power loss of about 70% of that of conventional materials over a wide temperature range of 20°C to 120°C at a frequency f = 100kHz and a magnetic flux density B+i = 200mT. You can see that it is low. In addition, as shown in Table 1, the saturation magnetic flux density of each example was 510 m
This is very high, more than T, and therefore excellent frequency characteristics of power loss as shown in FIG. 2 were obtained.
また、実施例６以外の本発明の電源用低損失フェライト
（実施例１〜１０）においても、第２図に示したものと
同様の傾向が見られた。Furthermore, the same tendency as shown in FIG. 2 was observed in the low-loss ferrites for power supplies of the present invention (Examples 1 to 10) other than Example 6.
（２） Ｆｅ２Ｏ，（５３，５ｍｏ１％）、Ｍｎ０（３
７，５ｍｏ１％）、Ｚｎ０（９，Ｏｍｏ１％）を主成分
とする原料を９００℃にて仮焼成した後、副成分として
、ＣａＣ０，を７５０ｐｐｍ（ＣａＯに換算すると４２
０ｐｐｍ） ＊５ｘ０１を３００ｐｐｍ、ＮｂｚＯｓを
５００ｐｐ■，Ｔａ５Ｏ，を１００ｐｐ■複合添加し、
ボールミルにて１２時間粉砕した。但し、ＣａＯ，Ｓｉ
Ｏ□のように原料に予め含有されている副成分について
は、仮焼成後に添加する量をその分だけ減じ、全体とし
て上記成分の割合に一致する様にした。(2) Fe2O, (53.5mol1%), Mn0 (3
7,5mo1%), Zn0 (9,Omo1%) as the main components is calcined at 900°C, and then CaC0 is added as a subcomponent at 750ppm (42% when converted to CaO).
0ppm) *300ppm of 5x01, 500pp of NbzOs, 100pp of Ta5O were added in combination,
The mixture was ground in a ball mill for 12 hours. However, CaO, Si
Regarding subcomponents such as O□, which were previously contained in the raw materials, the amount added after the pre-calcination was reduced by that amount, so that the overall ratio matched the above-mentioned component ratio.
この粉砕原料を乾燥後、バインダーを１ｗｔ％添加し、
造粒、成形した。この成形体を焼成温度１１５０℃、焼
成雰囲気は酸素分圧０．１％にて５時間焼成した。なお
、焼成体の形状は、外径２５■、内径１５■、高さ７．
５ｍｓのリング状とした。After drying this pulverized raw material, 1 wt% of binder was added,
Granulated and molded. This molded body was fired for 5 hours at a firing temperature of 1150° C. and a firing atmosphere of 0.1% oxygen partial pressure. The shape of the fired body is 25 cm in outer diameter, 15 cm in inner diameter, and 7 cm in height.
It was made into a ring shape with a duration of 5 ms.
この実施例１５と同様の試料作製工程において、添加物
条件を変えて各試料を作製した。この結果を第２表に示
す。In the same sample preparation process as in Example 15, each sample was prepared with different additive conditions. The results are shown in Table 2.
第
表
試料１２〜２２は、周波数２００ｋＨｚ 〜Ｉ ＭＨｚ
において電力損失の少ない本発明の実施例である。Samples 12 to 22 in the table have a frequency of 200kHz to I MHz.
This is an embodiment of the present invention in which power loss is small.
実施例１５の電力損失の温度特性を第３図に、また、電
力損失の周波数特性を第４図に示した。なお、比較とし
て従来例（試料７）の電力損失の温度特性及び周波数特
性も第３図及び第４図に示した。The temperature characteristics of power loss in Example 15 are shown in FIG. 3, and the frequency characteristics of power loss are shown in FIG. For comparison, the temperature characteristics and frequency characteristics of power loss of the conventional example (sample 7) are also shown in FIGS. 3 and 4.
第３図より、実施例１５の電源用低損失フェライトは、
周波数ｆ＝５００ｋＨｚ、磁束密度Ｂｍ：５０＋ｍＴに
おいて、２０℃〜１２０℃の広温度範囲で電力損失が従
来材の１／２〜ｌ／３程度と、極めて低いことがわかる
。From FIG. 3, the low-loss ferrite for power supply of Example 15 is
It can be seen that at a frequency f=500 kHz and a magnetic flux density Bm of 50+mT, the power loss is extremely low at about 1/2 to 1/3 of that of conventional materials over a wide temperature range of 20° C. to 120° C.
また、第４図より、実施例１５の電源用低損失フェライ
トが、従来の電源用フェライトに比べ、損失が１７２と
なるのは、磁束密度５０■Ｔでは２００ｋＨｚ以上１０
０ｍＴでは、 ３００ｋＨｚ以上であり、２００ｍＴで
は、Ｉ Ｎ）Ｉｚ以上であることが予想される。すなわ
ち。Moreover, from FIG. 4, the loss of the low-loss ferrite for power supply of Example 15 is 172 compared to the conventional ferrite for power supply, because the loss is 172 at a magnetic flux density of 50 T and above 200 kHz.
At 0 mT, it is expected to be at least 300 kHz, and at 200 mT, it is expected to be at least IN)Iz. Namely.
実施例１５が高周波低損失という特徴を発揮するのは、
周波数２００ｋＨｚ以上、磁束密度１００■Ｔ以下の動
作条件であると言える。The reason why Embodiment 15 exhibits the characteristic of low loss at high frequencies is because
It can be said that the operating conditions are a frequency of 200kHz or more and a magnetic flux density of 100T or less.
また、実施例１５以外の本発明の電源用低損失フェライ
ト（実施例１１〜２１）においても、第４図に示したも
のと同様の傾向が見られた。Furthermore, the same tendency as shown in FIG. 4 was observed in the low-loss ferrites for power supplies (Examples 11 to 21) of the present invention other than Example 15.
尚、主成分である。 Ｆｅ、Ｏ３，ＭｎＯ，ＺｎＯの割
合は、Ｆｅ、０． ５２．０〜５５．Ｏｍｏ１％、Ｍｎ
０ ３１．０〜４２．０ｍｏ１％、 ＺｎＯ６，０〜
１６．０ｍｏ１％の範囲であれば良い。Note that this is the main component. The proportions of Fe, O3, MnO, and ZnO are as follows: Fe, 0. 52.0-55. Omo1%, Mn
0 31.0~42.0mo1%, ZnO6,0~
It is sufficient if it is within the range of 16.0mo1%.
また、本発明において、副成分の添加量を限定した理由
は、以下の通りである。Further, in the present invention, the reason why the amount of the subcomponents added is limited is as follows.
副成分のＣａＯが１１０００ｐｐより多いと、電力損失
が増大すると共に、透磁率が急激に低下する。また、Ｃ
ａＯが２００ｐｐｍよりも少ないと、電気抵抗が低下す
るため、渦電流損失が増大し、電力損失は大きくなる。If the subcomponent CaO is more than 11,000 pp, power loss increases and magnetic permeability rapidly decreases. Also, C
When aO is less than 200 ppm, electrical resistance decreases, eddy current loss increases, and power loss increases.
副成分のＮｂ２Ｏ３，Ｔａ、０． 、Ｓｉｎ、が本発明
の範囲以上になると、異常焼結し、電力損失が増大する
と共に、透磁率及びＱ値も低下する。尚、高磁束密度・
低損失のフェライト焼結体を得るためには、ＳｉＯ□添
加量は、周波数２５ｋＨｚ 〜２００ｋ）Ｉｚ対応のも
ので２００ｐｐｍ以下、周波数２００ｋＨｚ〜Ｉ ＭＨ
ｚ対応のもので２００〜５００Ｐρ履の範囲で含有され
ることが望ましい。Subcomponents Nb2O3, Ta, 0. , Sin, exceeds the range of the present invention, abnormal sintering occurs, power loss increases, and magnetic permeability and Q value also decrease. In addition, high magnetic flux density
In order to obtain a ferrite sintered body with low loss, the amount of SiO□ added must be 200 ppm or less for frequencies of 25 kHz to 200 kHz, and 200 ppm or less for frequencies of 200 kHz to IMH.
It is desirable that the content is in the range of 200 to 500 Pρ for Z-compatible.
また、副成分のＮｂ、 Ｏ３，Ｔａ２０Ｓ及び５ｕｎ２
が本発明の範囲未満になると、電気抵抗が低下し電力損
失が増大すると共に、焼結が進まず、飽和磁束密度及び
透磁率も低下する。In addition, the subcomponents Nb, O3, Ta20S and 5un2
If it is less than the range of the present invention, electrical resistance decreases, power loss increases, sintering does not proceed, and saturation magnetic flux density and magnetic permeability also decrease.
副成分のＴｉｅ２が本発明の範囲以上になると、電力損
失の温度特性の極小点が低温側にシフトし。When the subcomponent Tie2 exceeds the range of the present invention, the minimum point of the temperature characteristic of power loss shifts to the low temperature side.
使用温度での電力損失が増大するため望ましくない。This is undesirable because it increases power loss at operating temperatures.
また、副成分のＴｉｅ、が本発明の範囲未満になると電
力損失が増大すると共に、飽和磁束密度も低下するため
望ましくない。Furthermore, if the subcomponent Tie falls below the range of the present invention, power loss increases and the saturation magnetic flux density also decreases, which is not desirable.
（発明の効果）
前述の如く、本発明の電源用低損失フェライトは．Ｆｅ
、０３．ＭｎＯ，ＺｎＯを主成分とし、副成分として１
） ＣａＯ２００〜１１０００ｐｐ、ＳＳ１０２５００
ｐｐ以下（０を含まず）ｙＮｂｚｏｓ １５００ＰＰ”
以下（０を含まず），Ｔａ２Ｏ５１５００ｐｐｍ以下（
０を含まず）
２） ＣａＯ２００−１０００ｐｐｍ、ＳＬ０２５００
ｐｐｍ以下（０を含まず）、Ｎｂ２Ｏ５１５００ｐｐ＋
ｍ以下（０を含まず），Ｔａ、０．１５００ｐｐｍ以下
（０を含まず）、ＴｉＯ□１０００〜２００００ｐｐ１
１３） ＣａＯ２００〜１１０００ｐｐｍ，ＳｉＯ２，
５００ｐｐｍ以下（０を含まず）Ｎｂ、Ｏｓ１５００ｐ
ｐｍ以下（０を含まず），ＴｉＯ、 １０００〜２００
００ｐＰ膳
のいずれかを複合添加、含有することにより、２５ｋＨ
ｚ〜Ｉ ＭＨｚにおいて、高磁束密度で、なおかつ充分
電力損失の少ないフェライトを得ることができる。(Effects of the Invention) As mentioned above, the low-loss ferrite for power supplies of the present invention is... Fe
, 03. The main components are MnO and ZnO, and 1 as a subcomponent.
) CaO200-11000pp, SS102500
PP or less (not including 0)yNbzos 1500PP”
Below (not including 0), Ta2O5 below 1500ppm (
0) 2) CaO200-1000ppm, SL02500
ppm or less (not including 0), Nb2O51500pp+
m or less (not including 0), Ta, 0.1500 ppm or less (not including 0), TiO□1000-20000 pp1
13) CaO200-11000ppm, SiO2,
500ppm or less (not including 0) Nb, Os1500p
pm or less (not including 0), TiO, 1000-200
By adding and containing any of the 00pP meals, 25kHz
z~I MHz, it is possible to obtain ferrite with high magnetic flux density and sufficiently low power loss.
第１図は、本発明に係る実施例６の場合の周波数１００
ｋＨｚ、磁束密度２００ｍＴにおける電力損失の温度特
性を従来例の場合と比較して示したものであり、第２図
は、磁束密度２００ｍＴ、周囲温度１００℃における本
発明に係る実施例６の電力損失の周波数特性を従来例の
場合と比較して示したものであり、第３図は、本発明に
係る実施例１５の場合の周波数５００ｋＨｚ、磁束密度
５０ｍＴにおける電力損失の温度特性を従来例の場合と
比較して示したものであり、第４図は、磁束密度５０璽
Ｔ４００ｍＴ・２００鳳Ｔ、周囲温度８０℃における本
発明に係る実施例１５の電力損失の周波数特性を従来例
の場合と比較して示したものである。FIG. 1 shows a frequency of 100 in the case of Example 6 according to the present invention.
The temperature characteristics of power loss at a magnetic flux density of 200 mT and a magnetic flux density of 200 mT are shown in comparison with that of a conventional example. Figure 2 shows the power loss of Example 6 according to the present invention at a magnetic flux density of 200 mT and an ambient temperature of 100°C. Figure 3 shows the frequency characteristics of power loss at a frequency of 500 kHz and magnetic flux density of 50 mT in the case of Example 15 according to the present invention in comparison with that of the conventional example. Figure 4 compares the frequency characteristics of the power loss of Example 15 according to the present invention with the conventional example at a magnetic flux density of 50T, 400mT, 200T and an ambient temperature of 80°C. This is what was shown.
Claims (3)
成分として、ＣａＯ２００〜１０００ｐｐｍ，ＳｉＯ＿
２，５００ｐｐｍ以下（０を含まず），Ｎｂ＿２Ｏ＿５
１５００ｐｐｍ以下（０を含まず），Ｔａ＿２Ｏ＿５１
５００ｐｐｍ以下（０を含まず）を複合添加、含有した
ことを特徴とする電源用低損失フェライト。1. The main components are Fe_2O_3, MnO, and ZnO, and the subcomponents are CaO200-1000ppm, SiO_
2,500 ppm or less (not including 0), Nb_2O_5
1500ppm or less (not including 0), Ta_2O_51
A low-loss ferrite for power supplies characterized by containing 500 ppm or less (excluding 0) in a composite manner.
成分として、ＣａＯ２００〜１０００ｐｐｍ，ＳｉＯ＿
２５００ｐｐｍ以下（０を含まず），Ｎｂ＿２Ｏ＿５１
５００ｐｐｍ以下（０を含まず），Ｔａ＿２Ｏ＿５１５
００ｐｐｍ以下（０を含まず），ＴｉＯ＿２１０００〜
２００００ｐｐｍを複合添加、含有したことを特徴とす
る電源用低損失フェライト。2. The main components are Fe_2O_3, MnO, and ZnO, and the subcomponents are CaO200-1000ppm, SiO_
2500ppm or less (not including 0), Nb_2O_51
500ppm or less (not including 0), Ta_2O_515
00ppm or less (not including 0), TiO_21000~
A low-loss ferrite for power supplies characterized by containing 20,000 ppm of compound additives.
成分として、ＣａＯ２００〜１０００ｐｐｍ，ＳｉＯ＿
２５００ｐｐｍ以下（０を含まず），Ｎｂ＿２Ｏ＿５１
５００ｐｐｍ以下（０を含まず），ＴｉＯ＿２１０００
〜２００００ｐｐｍを複合添加、含有したことを特徴と
する電源用低損失フェライト。3. The main components are Fe_2O_3, MnO, and ZnO, and the subcomponents are CaO200-1000ppm, SiO_
2500ppm or less (not including 0), Nb_2O_51
500ppm or less (not including 0), TiO_21000
A low-loss ferrite for power supplies characterized by containing ~20,000 ppm of composite additives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048714A JP3044666B2 (en) | 1990-02-26 | 1990-02-26 | Low loss ferrite for power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048714A JP3044666B2 (en) | 1990-02-26 | 1990-02-26 | Low loss ferrite for power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03248405A true JPH03248405A (en) | 1991-11-06 |
| JP3044666B2 JP3044666B2 (en) | 2000-05-22 |
Family
ID=12810972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2048714A Expired - Lifetime JP3044666B2 (en) | 1990-02-26 | 1990-02-26 | Low loss ferrite for power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3044666B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6627103B2 (en) | 2000-03-31 | 2003-09-30 | Tdk Corporation | Mn-Zn ferrite production process, Mn-Zn ferrite, and ferrite core for power supplies |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114401A (en) * | 1981-12-28 | 1983-07-07 | Tdk Corp | Superlow loss ferrite for power source |
| JPS60132301A (en) * | 1983-12-20 | 1985-07-15 | Sumitomo Special Metals Co Ltd | Oxide magnetic material |
| JPS60262405A (en) * | 1984-06-11 | 1985-12-25 | Sumitomo Special Metals Co Ltd | Manufacture of mn-zn ferrite |
| JPH03248404A (en) * | 1990-02-26 | 1991-11-06 | Hitachi Ferrite Ltd | Low-loss ferrite |
-
1990
- 1990-02-26 JP JP2048714A patent/JP3044666B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114401A (en) * | 1981-12-28 | 1983-07-07 | Tdk Corp | Superlow loss ferrite for power source |
| JPS60132301A (en) * | 1983-12-20 | 1985-07-15 | Sumitomo Special Metals Co Ltd | Oxide magnetic material |
| JPS60262405A (en) * | 1984-06-11 | 1985-12-25 | Sumitomo Special Metals Co Ltd | Manufacture of mn-zn ferrite |
| JPH03248404A (en) * | 1990-02-26 | 1991-11-06 | Hitachi Ferrite Ltd | Low-loss ferrite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6627103B2 (en) | 2000-03-31 | 2003-09-30 | Tdk Corporation | Mn-Zn ferrite production process, Mn-Zn ferrite, and ferrite core for power supplies |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3044666B2 (en) | 2000-05-22 |
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