Radio wave absorbing material
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMinoru Yoshinaka, Eizo Asakura, Mitsumasa Oku, Kouziro Matsuo, Hidenosuke Nakamura
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Abstract
A radio wave absorbing material comprising zinc oxide whiskers. In a preferred embodiment, the zinc oxide whiskers are comprised of a central part and needle crystal projections extending from said central part in plural different axial directions.
Claims9
A radio wave absorbing material comprising not less than 1 wt. % of zinc oxide whiskers held with or dispersed in a radio-wave-absorptive or radio-wave-transmissive holding material, wherein each of the zinc oxide whiskers has at least one needle crystal projection which includes a basal part and a tip opposite the basal part, wherein the length of the projection from the basal part to the tip is not less than 3 .mu.m.
A radio wave absorbing material comprising i) particles or fibers of ferrite, carbon, conductive potassium titanate, silicon carbide, a metal, or mixtures thereof, and ii) not less than 1 wt. % of zinc oxide whiskers as a radio wave absorbing element, both of which are held with or dispersed in a radio-wave-absorptive or radio-wave-transmissive holding material, wherein each of the zinc oxide whiskers has at least one needle crystal projection which includes a basal part and a tip opposite the basal part, wherein the length of the projection from the basal part to the tip is not less than 3 .mu.m .
Dependencies are inferred from the claim text.