Accession Number:

ADD014277

Title:

Porous Ceramic Bodies.

Descriptive Note:

Patent, Filed 5 Feb 87, patented 9 May 89,

Corporate Author:

DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Report Date:

1989-05-09

Pagination or Media Count:

4.0

Abstract:

This invention relates to porous ceramic bodies. Renewed interest in lightweight porous ceramics has been stimulated by the need for materials having low thermal expansion, low dielectric constant, andor low density for certain high-tech applications. It is an object of the present invention to provide an improved method for fabricating porous ceramic bodies. In accordance with the present invention there is provided an improved method for making a lightweight porous ceramic body which comprises the steps of providing a ceramic polymer solution blending high-strength fibers with the polymer solution to provide a mixture felting the mixture drying the resulting felt and firing the dried felt. Alternatively, the fibers may be felted, then impregnated with the ceramic polymer solution, then dried and fired. The polymer solution is an inorganic oxide network containing glass-forming elements such as Si, Al, Ti, Zr and the like and optionally, modifying elements such as Mg, B and the like. The oxide network is formed by controlled hydrolysis of an organo-metallic compound such as a metal alkoxide. Keywords Patents. aw

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE