| 摘要 |
PROBLEM TO BE SOLVED: To provide radio wave absorbing material having practical radio waves absorbing performance and capable of preventing generation of a harmful gas even in a case of fire. SOLUTION: The radio wave absorbing material contains 20-30 wt.% carbon powder having an average grain size 1-100μm and volatile component of not more than 0.5 wt.%, 15-40 wt.% a hydraulic cement, and the residual portion of a silica material, and has radio wave absorbing performance of not less than 20 dB in frequency bands of S band and C band. COPYRIGHT: (C)2008,JPO&INPIT
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