JPS63248184A - Electromagnetic-wave shielding material - Google Patents
Electromagnetic-wave shielding materialInfo
- Publication number
- JPS63248184A JPS63248184A JP62082511A JP8251187A JPS63248184A JP S63248184 A JPS63248184 A JP S63248184A JP 62082511 A JP62082511 A JP 62082511A JP 8251187 A JP8251187 A JP 8251187A JP S63248184 A JPS63248184 A JP S63248184A
- Authority
- JP
- Japan
- Prior art keywords
- less
- shielding material
- electromagnetic
- magnetic field
- wave shielding
- 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
- 239000000463 material Substances 0.000 title claims abstract description 26
- 239000011224 oxide ceramic Substances 0.000 claims abstract description 10
- 229910052574 oxide ceramic Inorganic materials 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 230000035699 permeability Effects 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 abstract description 2
- 229910009203 Y-Ba-Cu-O Inorganic materials 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電磁波シールド材に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to an electromagnetic shielding material.
従来、この種の材料としては、銅、鉄、アルミニウム、
亜鉛などのバルク材料およびそれらのテープ、箱などや
、金属繊維を混入したり、表面に金属材料をコーティン
グした導電性プラスチックス、又、フェライトなどを用
いてシールド材料が構成されていた。Traditionally, materials of this type include copper, iron, aluminum,
Shield materials have been constructed using bulk materials such as zinc, their tapes, boxes, etc., conductive plastics mixed with metal fibers, conductive plastics whose surfaces are coated with metal materials, ferrite, etc.
か＼るこの種の材料は、導電率を高くすることにより、
電磁波シールド効果を持たせる事に主眼をおいていたが
、銅、鉄、アルミニウム、亜鉛などの導電率には制限が
あり、大きな電磁波シールド効果を期待できなかった。By increasing the conductivity of this type of material,
The main focus was on providing an electromagnetic shielding effect, but due to the limited conductivity of copper, iron, aluminum, zinc, etc., it was not possible to expect a large electromagnetic shielding effect.
又、フェライトなどの材料は透磁率は高いものの導電率
が低くシールド効果を大きくするには、厚みが必要で重
量的、価格的に採用できなかった。In addition, although materials such as ferrite have high magnetic permeability, they have low electrical conductivity, and in order to increase the shielding effect, they must be thick and cannot be used due to weight and cost.
本発明は特許請求の範囲に記載した電磁シールド材で、
酸化物セラミックスからなる超電導材料を用いた電磁波
シールド材料であり、さらに必要に応じ上記シールド材
料は下部臨界磁界以下で用いるとともに上記厚みが１ｍ
ｍ以下にしたシールド材料である。The present invention is an electromagnetic shielding material described in the claims,
It is an electromagnetic wave shielding material using a superconducting material made of oxide ceramics, and if necessary, the above shielding material is used below the lower critical magnetic field and the above thickness is 1 m.
This is a shielding material with a thickness of less than m.
・ここで酸化物セラミックスからなる高温超電導体を用
いることにより、銅に比べて導電率は無限大に大きく、
又透磁率は０に近くなり、特に反射損失を大きくとるこ
とができる。・By using a high-temperature superconductor made of oxide ceramics, the electrical conductivity is infinitely greater than that of copper.
Moreover, the magnetic permeability becomes close to 0, and the reflection loss can be particularly large.
従来の超電導体では液体Ｈｅ を使用するので、コス
トが高く採用できなかったが、Ｙ−Ｂａ−Ｃｕ−０系の
酸化物セラミックスを用いることにより、少なくとも液
体Ｎ２ を用いれば良いので、その冷媒価格は激減す
る。Conventional superconductors use liquid He, which could not be adopted due to the high cost, but by using Y-Ba-Cu-0 based oxide ceramics, at least liquid N2 can be used, reducing the cost of the refrigerant. decreases dramatically.
酸化物セラミックス系の超電導材料は表面近傍での超電
導化が著しく、１ｍｍ以下と薄くすることにより、その
導電率無限大、透磁率零の特性を有効に用いることがで
きる。Oxide ceramic superconducting materials exhibit remarkable superconductivity in the vicinity of their surfaces, and by making them as thin as 1 mm or less, their characteristics of infinite electrical conductivity and zero magnetic permeability can be effectively utilized.
又、下部臨界磁界以下で用いることにより、透磁率０の
特性を最大限発揮できる。Furthermore, by using the magnetic field below the lower critical magnetic field, the characteristic of zero magnetic permeability can be maximized.
で、上記酸化物セラミックスを用いることによ怜、その
効果を最大限に発揮できる。By using the above-mentioned oxide ceramics, the effect can be maximized.
下部臨界磁界以上では透磁率が有限の値をもってくるの
で、その効果は減少されるが、要求される反射損失によ
り使用可能である。Above the lower critical magnetic field, the magnetic permeability has a finite value, so its effectiveness is reduced, but it can still be used depending on the required reflection loss.
導電率が無限大に大きく、透磁率が零である酸化物セラ
ミックスを電磁波シールド材料に用いるので、反射損失
を大きくとれることができ、その効果は大である。又使
用するセラミックス層の厚みを１ｍｍ以下としたため、
材料コストや低減できる。Since oxide ceramics, which have infinitely high electrical conductivity and zero magnetic permeability, are used as the electromagnetic wave shielding material, reflection loss can be increased, and the effect is great. In addition, since the thickness of the ceramic layer used was 1 mm or less,
Material costs can be reduced.
又、吸収損失を併用するため、フェライトとの複合板に
したり、強度やシールド効果の改良のため銅などの金属
板と複合することは本発明の範囲内である。Further, it is within the scope of the present invention to form a composite plate with ferrite to reduce absorption loss, or to combine with a metal plate such as copper to improve strength and shielding effect.
第１図は、本発明のシールド材の断面図、ｌは酸化物セ
ラミックス。
第２図は、本発明の他の実施例を示すシールド材の断面
図。
第３図は、本発明のその他の実施例を示すシールド材の
断面図である。
図中、１は酸化物セラミックス、２は電磁波、３はフェ
ライト、４は銅を示す。FIG. 1 is a cross-sectional view of the shielding material of the present invention, and l is an oxide ceramic. FIG. 2 is a sectional view of a shield material showing another embodiment of the present invention. FIG. 3 is a sectional view of a shield material showing another embodiment of the present invention. In the figure, 1 represents oxide ceramics, 2 represents electromagnetic waves, 3 represents ferrite, and 4 represents copper.
Claims (3)
ことを特徴とする電磁波シールド材料。(1) An electromagnetic shielding material characterized by using a superconducting material made of oxide ceramics.
許請求の範囲第（１）項記載の電磁波シールド材料。(2) The electromagnetic wave shielding material according to claim (1), wherein the shielding material is used below the lower critical magnetic field.
項又は第２項記載の電磁波シールド材料。(3) Claim 1, wherein the thickness is 1 mm or less
The electromagnetic shielding material according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62082511A JPS63248184A (en) | 1987-04-02 | 1987-04-02 | Electromagnetic-wave shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62082511A JPS63248184A (en) | 1987-04-02 | 1987-04-02 | Electromagnetic-wave shielding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63248184A true JPS63248184A (en) | 1988-10-14 |
Family
ID=13776547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62082511A Pending JPS63248184A (en) | 1987-04-02 | 1987-04-02 | Electromagnetic-wave shielding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63248184A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6487664A (en) * | 1987-09-28 | 1989-03-31 | Seiko Epson Corp | Magnetic shielding material |
| JPH02299295A (en) * | 1989-05-15 | 1990-12-11 | Ngk Insulators Ltd | Superconductive magnetic shield plate |
| JPH0368199A (en) * | 1989-08-07 | 1991-03-25 | Dowa Mining Co Ltd | Superconductive magnetic shield material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5145240A (en) * | 1974-10-16 | 1976-04-17 | Tokyo Electric Power Co | Anteiunyosochino seigyosochi |
-
1987
- 1987-04-02 JP JP62082511A patent/JPS63248184A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5145240A (en) * | 1974-10-16 | 1976-04-17 | Tokyo Electric Power Co | Anteiunyosochino seigyosochi |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6487664A (en) * | 1987-09-28 | 1989-03-31 | Seiko Epson Corp | Magnetic shielding material |
| JPH02299295A (en) * | 1989-05-15 | 1990-12-11 | Ngk Insulators Ltd | Superconductive magnetic shield plate |
| JPH0368199A (en) * | 1989-08-07 | 1991-03-25 | Dowa Mining Co Ltd | Superconductive magnetic shield material |
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