Accession Number:

AD0269033

Title:

Research on Binder Techniques for High Temperature Radome Structures

Descriptive Note:

Technical Report,18 Jul 1961,17 Oct 1961

Corporate Author:

GENERAL ELECTRIC CO SCHENECTADY NY SCHENECTADY

Report Date:

1961-10-17

Pagination or Media Count:

54.0

Abstract:

Microwave electrical data on high temperature radome materials, mica laminate and silica fiber-reinforced aluminum phosphate are discussed. Preliminary data has been gathered about silica fiber-reinforced aluminum phosphate laminates containing glass microspheres. Both materials have dielectric characteristics suitable for 1000 F radome applications. Use of inorganic glass microspheres as filler for aluminum phosphate binders results in lower processing viscosity, and the microsphere filler allows about half the water to be removed from the formulations without causing high viscosity or premature gelling. No improvement in electrical characteristics was noted. One formulation presented greater laminate flexural strength. Long-term aging problems exist in the silica fiber-aluminum phosphate laminate system. The laminates lose as much as one-half of their 1000 flexural strength after exposure for 100 hours at 1000 F. Even more drastic loss in strength occurs between initial room temperature strength and room temperature strength after exposure to elevated temperatures. The mica laminate XS-1342 does not exhibit this loss at 800 F.

Subject Categories:

  • Laminates and Composite Materials
  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE