Accession Number : ADD018307

Title :   Electromagnetic Window.

Descriptive Note : Patent, Filed 13 Mar 96, patented 12 Nov 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Talmy, Inna G ; Martin, Curtis A ; Haught, Deborah A ; Le, Anh H

Report Date : Nov 1996

Pagination or Media Count : 5

Abstract : A ceramic electromagnetic window made of Si3N4 particles which are bonded together by a metal phosphate binder that is an AlPO4 binder, a ZrP2O7 binder, or mixtures thereof, wherein the Si3N4 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 Si3N4 whiskers for some of the Si3N4 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.

Descriptors :   *CERAMIC MATERIALS, *WINDOWS, *ELECTROMAGNETISM, *SILICON NITRIDES, METALS, FIBERS, SHAPE, MIXTURES, CHEMICAL BONDS, CURVATURE, ALUMINUM, SHEETS, ZIRCONIUM, BINDERS, RADOMES, PHOSPHATES, PATENTS, WHISKER COMPOSITES

Subject Categories : Electricity and Magnetism
      Inorganic Chemistry
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE