Abstract
Electromagnetic wave absorption characteristics, electrical resistivity and micro pore structure (specific surface area and micro pore size distribution) of the powder-method woodceramics, which were prepared by carbonizing the compacted mixtures of wood powder and 10- 30mass% of phenolic resin powder, were examined in comparison with those of the conventional MDF-method woodceramics, which were prepared by carbonizing the medium density fiber (MDF) boards impregnated with phenolic resin solution. The powder-method woodceramics carbonized at 650°C showed remarkable electromagnetic absorption characteristics as same as MDF-method woodceramics, namely the absorption values of 10%, 20% and 30% phenolic resin specimens were 35 dB at 11 GHz, 40 dB at 9 GHz and 50 dB at 2 GHz, respectively. These remarkable absorptions were mainly due to the suitably high electrical resistivities (10 1-10 3Ωcm) of these woodceramics. The specific surface area of these woodceramics became to the maximum in the case of the carbonization at 700°C, namely 380m2·g -1 in the 30% phenolic resin powder specimen, 300m 2·g -1 in the MDF specimen and 230m 2 · g -1 in the 10% phenolic resin powder specimen, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 124-130 |
| Number of pages | 7 |
| Journal | Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy |
| Volume | 52 |
| Issue number | 2 |
| Publication status | Published - Feb 2005 |
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Keywords
- Carbon
- Electrical resistivity
- Electromagnetic wave absorption
- Specific surface area
- Woodceramics
ASJC Scopus subject areas
- Mechanical Engineering
- Metals and Alloys
Cite this
Electromagnetic wave absorption characteristics, electrical resistivity and micro pore structure of woodceramics prepared by powder method. / Miki, Masamichi; Kikuchi, Takeyuki; Inada, Shinji; Suzuki, Michitaka; Takada, Jun.
In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 52, No. 2, 02.2005, p. 124-130.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electromagnetic wave absorption characteristics, electrical resistivity and micro pore structure of woodceramics prepared by powder method
AU - Miki, Masamichi
AU - Kikuchi, Takeyuki
AU - Inada, Shinji
AU - Suzuki, Michitaka
AU - Takada, Jun
PY - 2005/2
Y1 - 2005/2
N2 - Electromagnetic wave absorption characteristics, electrical resistivity and micro pore structure (specific surface area and micro pore size distribution) of the powder-method woodceramics, which were prepared by carbonizing the compacted mixtures of wood powder and 10- 30mass% of phenolic resin powder, were examined in comparison with those of the conventional MDF-method woodceramics, which were prepared by carbonizing the medium density fiber (MDF) boards impregnated with phenolic resin solution. The powder-method woodceramics carbonized at 650°C showed remarkable electromagnetic absorption characteristics as same as MDF-method woodceramics, namely the absorption values of 10%, 20% and 30% phenolic resin specimens were 35 dB at 11 GHz, 40 dB at 9 GHz and 50 dB at 2 GHz, respectively. These remarkable absorptions were mainly due to the suitably high electrical resistivities (10 1-10 3Ωcm) of these woodceramics. The specific surface area of these woodceramics became to the maximum in the case of the carbonization at 700°C, namely 380m2·g -1 in the 30% phenolic resin powder specimen, 300m 2·g -1 in the MDF specimen and 230m 2 · g -1 in the 10% phenolic resin powder specimen, respectively.
AB - Electromagnetic wave absorption characteristics, electrical resistivity and micro pore structure (specific surface area and micro pore size distribution) of the powder-method woodceramics, which were prepared by carbonizing the compacted mixtures of wood powder and 10- 30mass% of phenolic resin powder, were examined in comparison with those of the conventional MDF-method woodceramics, which were prepared by carbonizing the medium density fiber (MDF) boards impregnated with phenolic resin solution. The powder-method woodceramics carbonized at 650°C showed remarkable electromagnetic absorption characteristics as same as MDF-method woodceramics, namely the absorption values of 10%, 20% and 30% phenolic resin specimens were 35 dB at 11 GHz, 40 dB at 9 GHz and 50 dB at 2 GHz, respectively. These remarkable absorptions were mainly due to the suitably high electrical resistivities (10 1-10 3Ωcm) of these woodceramics. The specific surface area of these woodceramics became to the maximum in the case of the carbonization at 700°C, namely 380m2·g -1 in the 30% phenolic resin powder specimen, 300m 2·g -1 in the MDF specimen and 230m 2 · g -1 in the 10% phenolic resin powder specimen, respectively.
KW - Carbon
KW - Electrical resistivity
KW - Electromagnetic wave absorption
KW - Specific surface area
KW - Woodceramics
UR - http://www.scopus.com/inward/record.url?scp=18344376189&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=18344376189&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:18344376189
VL - 52
SP - 124
EP - 130
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
SN - 0532-8799
IS - 2
ER -