JPH0388766A - Cu-zn ferrite material for radio wave absorber - Google Patents
Cu-zn ferrite material for radio wave absorberInfo
- Publication number
- JPH0388766A JPH0388766A JP1223583A JP22358389A JPH0388766A JP H0388766 A JPH0388766 A JP H0388766A JP 1223583 A JP1223583 A JP 1223583A JP 22358389 A JP22358389 A JP 22358389A JP H0388766 A JPH0388766 A JP H0388766A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite material
- ferrite
- radio wave
- mol
- cuo
- 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 34
- 239000000463 material Substances 0.000 title claims abstract description 32
- 239000006096 absorbing agent Substances 0.000 title claims description 5
- 229910017518 Cu Zn Inorganic materials 0.000 claims abstract description 6
- 229910017752 Cu-Zn Inorganic materials 0.000 claims abstract description 6
- 229910017943 Cu—Zn Inorganic materials 0.000 claims abstract description 6
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical class [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims abstract description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 3
- 238000005245 sintering Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- 241000985694 Polypodiopsida Species 0.000 description 1
- 229910007541 Zn O Inorganic materials 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は電波吸収体用のフェライト材に関し、特にテ
レビ電波の反射障害を功止する目的で用い得るＣｕ−Ｚ
ｎ系フェライト材に間する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a ferrite material for a radio wave absorber, and in particular to a Cu-Z ferrite material that can be used for the purpose of effectively eliminating interference with the reflection of television radio waves.
Used in n-type ferrite material.
（従来の技術及び発明が解決しようとする課８）近年、
都市の高層化が進むのに伴なってビルによるテレビ電波
の反射障害、即ちビルによる反射電波がテレビ放送電波
と重合して画面にゴーストを生ぜしめる問題がクローズ
アップされており、その対策としてフェライト板を高層
建築物の壁面に取り付ける試みがなされている。(Question 8 to be solved by conventional technology and invention) In recent years,
As cities become more and more high-rise, the problem of interference with the reflection of TV radio waves by buildings, in which the radio waves reflected by buildings overlap with TV broadcast radio waves and cause ghosts on the screen, has become a focus of attention. Attempts have been made to attach boards to the walls of high-rise buildings.
ところでかかるテレビ電波の反射障害防止用として従来
用いられているフェライト材は、主にＮ１−Ｚ＋系フェ
ライト材であるが、このフェライト材においては原料の
一部であるニッケルの価格が高いこと、また焼成に際し
て１３００℃前後の高い温度で焼成しなけらばならない
ことから、製品価格が高価である問題があった。By the way, the ferrite materials conventionally used for preventing reflection interference of TV radio waves are mainly N1-Z+ type ferrite materials, but in this ferrite material, the price of nickel, which is a part of the raw material, is high, and Since the firing must be performed at a high temperature of around 1300° C., there is a problem in that the product price is high.
（Ｈ題を解決するための手段）
本発明はこのような事情に鑑みてなされたもので、その
要旨はフェライト材の組成を、Ｆｅ２Ｏ３ＣｕＯ，Ｚｎ
Ｏを主成分とし丘つそれらを夫々（イ）ＦＩ！ｚＯｔ
： ４５モル％より多い量で６０モル％未満（ｏ） Ｃ
ｕＯ： １５モル％よす多い量で３５モル％未満（ハ）
ＺｎＯ： １５モル％よす多い量で３５モル％未満の
各範囲で含有するように處したことにある。(Means for solving problem H) The present invention was made in view of the above circumstances, and the gist thereof is to change the composition of the ferrite material to Fe2O3CuO, Zn
O is the main component and each of them is (a) FI! zOt
: More than 45 mol% but less than 60 mol% (o) C
uO: 15 mol% more but less than 35 mol% (c)
ZnO: The content was set to be in the range of more than 15 mol% and less than 35 mol%.
（作用及び発明の効果）
磁性材料としてのフェライト材は、従来より種々組成の
ものが知られている。Ｎｉ−Ｚｎ系フェライト材、Ｍｎ
−＝Ｚｎ系フェライト材等の複合系フェライト材はその
代表的なものであり、その他にもＭｎフェライト、Ｎｉ
フェライト、Ｇｏフェライト。(Function and Effects of the Invention) Ferrite materials as magnetic materials have been known in various compositions. Ni-Zn ferrite material, Mn
Composite ferrite materials such as −=Zn ferrite materials are typical, and there are also Mn ferrite, Ni
Ferrite, Go ferrite.
Ｃｕフェライト、Ｚｎフェライト等のものが知られてい
る。Things such as Cu ferrite and Zn ferrite are known.
Ｃｕ−Ｚｎ系フェライト材もこの種磁性材の一種として
既に知られたものである。Cu--Zn-based ferrite material is also already known as a type of this type of magnetic material.
しかしながらテレビ電波の反射障害防止目的のために用
い得るフェライト材となると、吸収すべき周波数帯が限
定されてくることから、その種類も自ずと限られてし、
まい、前述したようにそれらのうちで主に用いられてい
るのは旧−ハ系フェライト材である。而してこのＸｌ−
Ｚｎ系フェライト材は価格が高い欠点があり、そこで本
発明者はその他のフェライト材をテレビ電波の反射ＩＩ
Ｉ害防止用として用いることの可能性を検討し、そして
各種実験を試みたｔころ、この種目的のために従来は用
いられていない上記Ｃｕ−Ｚｎ系フェライト材が。However, when it comes to ferrite materials that can be used for the purpose of preventing reflection interference of TV radio waves, the frequency band that must be absorbed is limited, so the types of ferrite materials are naturally limited.
However, as mentioned above, among these materials, the one that is mainly used is the old-V series ferrite material. Then this Xl-
Zn-based ferrite materials have the disadvantage of being expensive, so the inventors developed other ferrite materials to reflect TV radio waves II.
After considering the possibility of using the Cu-Zn-based ferrite material for prevention of I damage, and conducting various experiments, we discovered the above-mentioned Cu-Zn-based ferrite material, which has not been previously used for this purpose.
その成分の組成範囲を特定範囲に抑えるならば。If the composition range of the components is kept within a specific range.
テレビ電波を有効に吸収し得ることを見出し１本発明を
完成させた。The present invention was completed by discovering that television waves can be effectively absorbed.
即ちテレビ電波の反射障害を防止する目的で用いるため
には、約９０〜２２ＯＭＨｚの周波数帯で良好な電波吸
収特性を示すことが要求されるが、上記のように各成分
が特定範囲に調整されで威るＣｕ−Ｚｎ系フェライト材
は、この要求を十分満足し得ることが判明したのである
。In other words, in order to use it for the purpose of preventing reflection disturbances of television radio waves, it is required to exhibit good radio wave absorption characteristics in the frequency band of about 90 to 22 MHz, but as mentioned above, each component is adjusted to a specific range. It has been found that the Cu-Zn ferrite material, which is popular in the industry, satisfies this requirement.
而してかかるＣｕ−Ｚｎ系フェライト材の場合、上記Ｘ
１−Ｚｎ系フェライト材と異なって原料の価格が安いこ
と、加えてこのＣｕ−Ｚｎ系フェライト材の場合、低い
焼成温度で焼成可能なことから、製品の価格が安価とな
る利点が生ずる。In the case of such a Cu-Zn ferrite material, the above X
Unlike the 1-Zn-based ferrite material, the raw material cost is low, and in addition, the Cu--Zn-based ferrite material can be fired at a low firing temperature, resulting in an advantage that the product price is low.
（実施例）
次に本発明の特徴をより明確にすべく、以下にその実施
例を詳述する。(Example) Next, in order to clarify the characteristics of the present invention, examples thereof will be described in detail below.
Ｃｕ、Ｏ、ＺｕＯ、Ｆｅｒｎｓの含有量を第！表に示す
種々の割合で変化させて夫々を同表に示す温度で焼成し
、得られた焼成品の電波吸収特性を測定した。結果が同
じく第１表に併せて示しである。The content of Cu, O, ZuO, Ferns! The various ratios shown in the table were changed and each was fired at the temperature shown in the table, and the radio wave absorption characteristics of the obtained fired products were measured. The results are also shown in Table 1.
第１表：Ｃ：ｕ−Ｚｎ系フェライト材の組成と測定結果
尚表中の評価で○、○、Δ、×とあるのは、夫々
■＝テレビのＶＨＦ帯の吸収羽として性能が非常に良好
（２ＯｄＢ以上）。Table 1: C: Composition and measurement results of u-Zn ferrite material In the evaluations in the table, ○, ○, Δ, and × indicate that the performance as an absorption blade for the VHF band of TV is very high. Good (2OdB or more).
Ｏ：テレビのＶＨＦ帯の吸収材として性能が良好（１８
ｄＢ以上）。O: Good performance as a TV VHF band absorber (18
dB or more).
Δ：テレビのＶＨＦ帯の吸収材として適度な性能（１５
ｄＢ以上）。Δ: Moderate performance as a TV VHF band absorber (15
dB or more).
×：テレビのＶＨＦ帯の吸収材としては適さない。×: Not suitable as an absorbent material for VHF band of television.
ことを意味している。It means that.
第１図はこのうちＮｏ、 ５ （Ａ）とＮｏ、 ｌ １
（Ｂ） （７）みをピックアップして、その電波吸収
特性を、横軸に周波数を、縦紬に反射減衰量（ｄＢ）を
とって示したものである。但し図中Ｃは従来のＮｉ−Ｚ
ｎ系フェライト材の電波吸収特性を示している。Figure 1 shows No. 5 (A) and No. l 1 of these.
(B) (7) is picked up, and its radio wave absorption characteristics are shown with frequency on the horizontal axis and return loss (dB) on the vertical axis. However, C in the figure is the conventional Ni-Z
It shows the radio wave absorption characteristics of n-based ferrite material.
この結果に見られるように、ＣｕＯ、Ｚ！１０Ｆｅ２Ｏ
ｚを夫々本発明の範囲に抑えることによって、ＶＨＦ帯
（９０〜２２ＯＭＨｚ） で良好な電波吸収特性を示す
ことが確認された。As seen in this result, CuO, Z! 10Fe2O
It was confirmed that by keeping z within the range of the present invention, good radio wave absorption characteristics were exhibited in the VHF band (90 to 22 OMHz).
以上本発明の実施例を詳述したが、本発明はその主旨を
逸脱しない範囲において、当業者の知識に基づき様々な
変更を加えた態様において実施可能である。Although the embodiments of the present invention have been described in detail above, the present invention can be implemented in various modifications based on the knowledge of those skilled in the art without departing from the spirit thereof.
第１図は本発明の実施例に係るＣｕ−Ｚｎ系フェライト
材の電波吸収特性の測定結果を示す特性図である。FIG. 1 is a characteristic diagram showing the measurement results of the radio wave absorption characteristics of a Cu--Zn-based ferrite material according to an example of the present invention.
Claims (1)
々を（イ）Ｆｅ＿２＿Ｏ＿３：４５モル％より多い量で
６０モル％未満（ロ）ＣｕＯ：１５モル％より多い量で
３５モル％未満（ハ）ＺｎＯ：１５モル％より多い量で
３５モル％未満の各量範囲で含有することを特徴とする
電波吸収体用Ｃｕ−Ｚｎ系フェライト材。The main components are Fe_2O_3, CuO, and ZnO, each of which is (a) Fe_2_O_3: more than 45 mol% and less than 60 mol% (b) CuO: more than 15 mol% and less than 35 mol% (c) ZnO: 15 A Cu-Zn-based ferrite material for a radio wave absorber, characterized in that the content ranges from more than 35 mol% to less than 35 mol%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1223583A JPH0388766A (en) | 1989-08-30 | 1989-08-30 | Cu-zn ferrite material for radio wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1223583A JPH0388766A (en) | 1989-08-30 | 1989-08-30 | Cu-zn ferrite material for radio wave absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0388766A true JPH0388766A (en) | 1991-04-15 |
Family
ID=16800442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1223583A Pending JPH0388766A (en) | 1989-08-30 | 1989-08-30 | Cu-zn ferrite material for radio wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0388766A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05206728A (en) * | 1991-08-13 | 1993-08-13 | Korea Advanced Inst Of Sci Technol | Ferrite-based wave absorber |
| JPH05259732A (en) * | 1991-08-13 | 1993-10-08 | Korea Advanced Inst Of Sci Technol | Manufacture of radio wave absorber |
-
1989
- 1989-08-30 JP JP1223583A patent/JPH0388766A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05206728A (en) * | 1991-08-13 | 1993-08-13 | Korea Advanced Inst Of Sci Technol | Ferrite-based wave absorber |
| JPH05259732A (en) * | 1991-08-13 | 1993-10-08 | Korea Advanced Inst Of Sci Technol | Manufacture of radio wave absorber |
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