| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic wave absorbing material, together with its manufacturing method, which comprises an electromagnetic wave absorbing performance with less weight and high manufacturing efficiency. SOLUTION: Water is added to the powder material wherein 20-60 wt.% of ferrite, 5-30 wt.%, with bulk density being 0.15 or less, of calcium silicate hydrate (ultra-light calcium silicate hydrate), cement, siliceous material, and fabric reinforcing material are mixed to provide a kneaded material, which is extrusion-molded or dehydration-molded before hydrothermal process. Thus, an electromagnetic wave absorbing material is provided. Here, since an ultra- light calcium silicate hydrate is used, the increase in weight of electromagnetic wave absorbing material which comprises ferrite is suppressed for lighter electromagnetic wave absorbing material.
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