Electromagnetic Shielding Properties of Woodceramics Made from Wastepaper

被引：82

作者：

Shibata, Kiyotaka ^{[1
]}

Okabe, Toshihiro ^{[2
]}

Saito, Kouji ^{[2
]}

Okayama, Takayuki ^{[3
]}

Shimada, Masahiro ^{[4
]}

Yamamura, Akira ^{[5
]}

Yamamoto, Ryoichi ^{[6
]}

机构：

[1] Aomori Polytech Coll, Iizume, Gosyogawara 037, Japan

[2] Ind Res Inst Aomori Prefecture, Hirosaki, Aomori 036, Japan

[3] Tokyo Univ Agr & Technol, Fuchu, Tokyo 183, Japan

[4] Ind Res Inst Tokyo Prefecture, Kita Ku, Tokyo 115, Japan

[5] Nikkan Sports Logitem, Chuo Ku, Tokyo 104, Japan

[6] Univ Tokyo, Inst Ind Sci, Minato Ku, Tokyo 106, Japan

来源：

JOURNAL OF POROUS MATERIALS | 1997年 / 4卷 / 04期

关键词：

woodceramics; porous carbon; electromagnetic shielding; wastepaper;

D O I：

10.1023/A:1009625322670

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Woodceramics are new porous carbon materials, which are made by impregnating woody materials with phenol resin and then thermoformed in a vacuum furnace and these have been shown to have electromagnetic shielding properties. In the recycling of wastepaper, ways of using the wastepaper other than for paper pulp are needed to be developed. In this study, we made Woodceramics from handbill advertisement paper and telephone directory paper, and measured their electromagnetic shielding properties in order to find new uses for wastepaper. The results showed that the Woodceramics made from wastepaper had an electric shielding effectiveness of 30 dB for 100 MHz and 40 to 43 dB for 300 MHz or higher, and had a magnetic shielding effectiveness of 30 dB for 100 MHz and 37 dB for about 400 MHz. An electric equivalent circuit of the pore model in the Woodceramics is introduced. In addition, it is proposed that the excellent electromagnetic shielding effectiveness of the Woodceramics is caused by dielectric loss.

引用

页码：269 / 275

页数：7

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