Electromagnetic wave absorbing material containing carbon micros

Details Electromagnetic wave absorbing material containing carbon micros Electromagnetic wave absorbing material containing carbon micros

1974-02-28

1976-04-20

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25EP, 260 37EP, 260 4246, C08L 6700

Patent

active

039519040

ABSTRACT:
An electromagnetic wave absorbing material comprising as a conductive material hollow carbon microspheres which are prepared by the use of a coal-base or petroleum-base pitch material and which have a non-cohesive property with one another, and as a matrix a non-conductive material having a specific resistance of greater than 10.sup.3 .OMEGA. cm, the conductive material being mixed with the non-conductive material and the mixture being formed into moldings. The resultant composite moldings exhibit a satisfactory complex dielectric constant, so that the composite material is applicable, for example, as a waveguide microwave absorber, a microwave pollution preventive microwave absorber, a microwave absorber for microwave heating range, or a microwave absorber for an antenna.

REFERENCES:
patent: 3786134 (1974-01-01), Amagi et al.
patent: 3830740 (1974-08-01), Amagi et al.
patent: 3832426 (1974-08-01), Malthouse et al.

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