JPS5851600A - Electromagnetic wave absorber - Google Patents
Electromagnetic wave absorberInfo
- Publication number
- JPS5851600A JPS5851600A JP15034381A JP15034381A JPS5851600A JP S5851600 A JPS5851600 A JP S5851600A JP 15034381 A JP15034381 A JP 15034381A JP 15034381 A JP15034381 A JP 15034381A JP S5851600 A JPS5851600 A JP S5851600A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic wave
- wave absorber
- frequency
- sintered body
- noise
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、ｚｎＯ（酸化亜鉛）を主成分、数種の金属酸
化物を添加成分とする焼結体を用いた電磁波吸収体に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic wave absorber using a sintered body containing znO (zinc oxide) as a main component and several types of metal oxides as additional components.
周知の通り、空中には６禎の電磁波が飛び交っており、
その中には雑音として取扱われるものが含まれている。As we all know, there are six waves of electromagnetic waves flying around in the air.
This includes what is treated as noise.
゛この種の雑音の遮蔽には、カーボン粉末あるいはフェ
ライト粉末等を高分子合成樹脂に分散させて薄膜状の電
磁波吸収体を鞠、抵抗体（カーボン粉末）のオーム損失
あるいは磁性体（７エライト粉末）の磁気損失を利用し
て電１ｓｉｓ。゛To shield this kind of noise, carbon powder or ferrite powder, etc. is dispersed in a polymeric synthetic resin and a thin film-like electromagnetic wave absorber is used. ) using magnetic loss.
ｔＩ＆収させているが、いずれも比較的高い周波数帯（
１０”む前Ｖｋ）の電磁波の吸収を目的としてお９、精
密＃Ｊ足を妨害したシ、精密機械の動作を狂わすおそれ
がある非常に低い周波数帯の雑音（例えば電力線からの
電ａＷｓ導による雑音）の迩散は甚だ困難であった。tI&, but both are in a relatively high frequency band (
The purpose of this product is to absorb electromagnetic waves of 10" Vk), which interfere with precision equipment, and very low frequency noise that may disrupt the operation of precision machinery (e.g. due to electrical conduction from power lines. It was extremely difficult to dissipate the noise.
本発明扛上紀拳悄に籠みてなされたもので、誘電体の紡
電慎失を利用することにより、有効に低周波数の雑音を
吸収することができる電磁波吸収体ｔ−徒供することを
目的とする。The present invention was developed with the aim of developing an electromagnetic wave absorber that can effectively absorb low frequency noise by making use of the spinning properties of a dielectric material. shall be.
本発明では、訪電体としてＺｎＯｔ−主成分、数種の金
属酸化物を添加成分とする焼結体（セライクス半導体）
を薄板状ま九は粉末状の形で用いる。In the present invention, a sintered body (CELAIX semiconductor) containing ZnOt as a main component and several kinds of metal oxides as additive components is used as a current visiting body.
It is used in powdered form.
薄板状の場合には焼成前の成形時に所要形状に成形し、
また粉末状の場合には焼成後焼結体ｔ−粉砕して粉末と
する。薄板は雑音の侵入を防止したい物の周囲に配設す
ることによって、粉末社他の壁面材料Ｃ１６料、コンク
ＩＪ −） 等）に混ぜ込んで壁面に塗布することによ
り雑音遮蔽面を形成する。In the case of a thin plate, it is molded into the desired shape before firing,
In the case of a powder, the sintered body is t-pulverized after firing to form a powder. The thin plate can be placed around an object to prevent noise from entering, and can be mixed with a wall surface material (C16 material manufactured by Powder Co., Ltd., Conc IJ-), etc.) and applied to the wall surface to form a noise shielding surface.
前記焼結体は、ＺｎＯを主成分とし、Ｂｉ、Ｏ，。The sintered body mainly contains ZnO, Bi, O, etc.
ｃｏｉｏ、 、ＳＪＯ＋１ 、Ｍｎ０１．０ｒ１０３
、Ｓｉｎｇ等数棟の金属酸化物を各々０．１〜２．０モ
ル饅の範囲て絵加し、混合、造粒、成形を行った後、１
１００〜１３００℃の温度で焼成して得る。この焼結体
は、構造的には５〜１０ミクロン程度のＺｎＯ結晶微粒
子を０．１ミクロン前後の高抵抗粒界層が取少囲み、こ
の薄層を介してＺｎＯの焼結粒子が互いに接触する形に
なっており、その誘電特性を第１図〜第３図に示す。coio, , SJO+1, Mn01.0r103
, Sing, and other metal oxides in a range of 0.1 to 2.0 mol each, mixed, granulated, and molded, 1
It is obtained by firing at a temperature of 100 to 1300°C. This sintered body has a structure in which ZnO crystal fine particles of about 5 to 10 microns are surrounded by a high-resistance grain boundary layer of about 0.1 micron, and the sintered ZnO particles come into contact with each other through this thin layer. Its dielectric properties are shown in FIGS. 1 to 3.
第１図は周波数と比訪電率の関係、第２図は周波数と誘
電撫率の関係、第３図は周波数と誘電正接（−δ）の関
係をそれぞれ示している。なお、測輩温度は５℃である
。FIG. 1 shows the relationship between frequency and specific electric current constant, FIG. 2 shows the relationship between frequency and dielectric constant, and FIG. 3 shows the relationship between frequency and dielectric loss tangent (-δ). Note that the measured temperature is 5°C.
第１図〜第３図から明らかなように焼結体は周波数ｌＯ
〜ｌＱ Ｈｚ において大きな吸収帯を持っている
。As is clear from Figures 1 to 3, the sintered body has a frequency lO
It has a large absorption band at ~lQ Hz.
この吸収はＺｎＯ焼結体の持つ二層構造（ＺｎＯ粒子と
Ｂｉ！Ｏ，ｔ−主体とする粒界層）の界面において起こ
る分極によるものと考えられ、その部分の損失が低周波
数の電磁波吸収に有効に作用して低周波数の電磁波（雑
音）の逅敞が可能となる。This absorption is thought to be due to polarization that occurs at the interface of the two-layer structure of the ZnO sintered body (grain boundary layer mainly composed of ZnO particles and Bi!O, t-), and the loss in that part is due to the absorption of low-frequency electromagnetic waves. This makes it possible to absorb low-frequency electromagnetic waves (noise).
即ち、前述のように遮蔽面を形成した場合、外部から飛
来する低周波数の電磁波が遮蔽面で吸収されることにな
り、正確な精密測定や精密機械の精度の高い動作が期待
できる。That is, when a shielding surface is formed as described above, low-frequency electromagnetic waves coming from the outside are absorbed by the shielding surface, and accurate precision measurements and highly accurate operation of precision machines can be expected.
以上のように本発明によれは、ｚｎＯを主成分とし、数
種の金属酸化物を添加成分とする焼結体を電磁波吸収体
として用いたので、その吸収帯の作用によシミ磁波、特
に低周波数の電磁波が吸収されるようになり、低周波数
の雑材の遮蔽に有効である。As described above, according to the present invention, since a sintered body containing ZnO as a main component and several kinds of metal oxides as an additive component is used as an electromagnetic wave absorber, stain magnetic waves, especially Low-frequency electromagnetic waves are now absorbed, making it effective for shielding low-frequency miscellaneous materials.
図面は本発明に係る電磁波吸収体の誘電特性を示すもの
で、第１図は周波数と比酵電軍の関係を示す図、第２図
は周波数と篩篭損率の関係を示す図、第３図は周波数と
誘電正接の関係を示す図である。The drawings show the dielectric properties of the electromagnetic wave absorber according to the present invention, and FIG. 1 shows the relationship between frequency and specific fermentation force, FIG. 2 shows the relationship between frequency and sieve loss rate, and FIG. FIG. 3 is a diagram showing the relationship between frequency and dielectric loss tangent.
Claims (1)
３．００１０ｇ、８ｔ１ｔｏｓ、Ｍｎ０１．０ｒ２０１
．５ｉｎｓ 勢数種の金−酸化物を各々０．１〜２．０
モル饅の範囲で添加し、混合、造粒、成形、焼成して得
た焼結体を薄板状または粉末状として用いた電磁波吸収
体。(1) ZnOt is the main component, and this is K B i! 0
3.0010g, 8t1tos, Mn01.0r201
．． 5ins 0.1 to 2.0 each of several kinds of gold-oxides
An electromagnetic wave absorber using a sintered body in the form of a thin plate or powder, which is obtained by adding a molar amount of the mixture, mixing, granulating, molding, and firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15034381A JPS5851600A (en) | 1981-09-22 | 1981-09-22 | Electromagnetic wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15034381A JPS5851600A (en) | 1981-09-22 | 1981-09-22 | Electromagnetic wave absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5851600A true JPS5851600A (en) | 1983-03-26 |
Family
ID=15494916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15034381A Pending JPS5851600A (en) | 1981-09-22 | 1981-09-22 | Electromagnetic wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5851600A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02223106A (en) * | 1989-02-22 | 1990-09-05 | Matsushita Electric Ind Co Ltd | Electric wire |
| JPH0517073U (en) * | 1991-08-16 | 1993-03-05 | 立山アルミニウム工業株式会社 | Refurbished ashishi |
| JPH0913797A (en) * | 1995-06-30 | 1997-01-14 | Ykk Architect Prod Kk | Renovated window |
-
1981
- 1981-09-22 JP JP15034381A patent/JPS5851600A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02223106A (en) * | 1989-02-22 | 1990-09-05 | Matsushita Electric Ind Co Ltd | Electric wire |
| JPH0517073U (en) * | 1991-08-16 | 1993-03-05 | 立山アルミニウム工業株式会社 | Refurbished ashishi |
| JPH0913797A (en) * | 1995-06-30 | 1997-01-14 | Ykk Architect Prod Kk | Renovated window |
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