Compositions: ceramic – Ceramic compositions – Refractory
Patent
1996-03-13
1996-11-12
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501 95, 501103, 501105, C04B 35584
Patent
active
055739865
ABSTRACT:
A ceramic electromagnetic window made of Si.sub.3 N.sub.4 particles which are bonded together by a metal phosphate binder that is an AlPO.sub.4 binder, a ZrP.sub.2 O.sub.7 binder, or mixtures thereof, wherein the Si.sub.3 N.sub.4 particles comprise from 55 to 85 volume percent of the ceramic material of the electromagnetic window with the metal phosphate binder comprising the remainder. By substituting Si.sub.3 N.sub.4 whiskers for some of the Si.sub.3 N.sub.4 particles a discontinuous fiber composite ceramic electromagnetic window is produced. The electromagnetic window may be a simple shape such as a flat or slightly curved sheet or a more complex shape such as a conical or spherical radome.
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Haught Deborah A.
Le Anh H.
Martin Curtis A.
Talmy Inna G.
Bell Mark L.
Forrest John
Johnson Roger D.
The United States of America as represented by the Secretary of
Troilo Louis M.
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