Electromagnetic wave absorbers of silicon carbide fibers
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United States of America Patent
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Feb 23, 1988
Grant Date -
N/A
app pub date -
Mar 6, 1987
filing date -
Mar 18, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electromagnetic wave absorber comprising a surface layer made of a composite of fibers having an electrical specific resistance of more than 10.sup.4 .OMEGA.cm and a resin, and a wave absorbing layer made of a composite containing silicon carbide fibers having an electrical specific resistance of from 10.sup.-2 to 10.sup.4 .OMEGA.cm. The composite used in the surface layer may be prepared, for example, by impregnating the resin in between the fibers after they have been treated to be a woven cloth, mat or felt or unidirectionally arranged fibers. If a wave absorbing layer is to be made of a composite containing the silicon carbide fibers and a resin, then the composite may be prepared in the same way as above.
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