| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively provide a radio wave absorber which is compact and has radio wave absorbing performance to enable the absorber to be used even in a radio-wave dark room, the radio wave absorber being usable over a wide band without spoiling the performance. SOLUTION: The radio wave absorber is made thorough steps of: impregnating a woody material with a thermosetting resin and curing it; carrying out carbonization treatment of the cured one; pulverizing the carbonized one and regulating particle sizes into a carbonized powder 3; dispersing the carbonized powder 3 in an organic binder 2 to form a carbon powder absorber and kneading and dispersing the carbon powder absorber, or coating the organic binder 2 on surfaces of grains of the carbonized powder 3 and ramming down it to make it harden; and molding the previous step one in a predetermined shape. COPYRIGHT: (C)2010,JPO&INPIT |
