Accession Number : ADP007454

Title :   Multifunctional Silica Optics,

Corporate Author : FLORIDA UNIV ALACHUA ADVANCED MATERIALS RESEARCH CENTER

Personal Author(s) : Hench, L.L. ; Fosmoe, A.

Report Date : FEB 1991

Pagination or Media Count : 12

Abstract : The sol-gel chemical processing method of producing fully dense silica optics provides an intermediate product termed Type VI silica ideally suited for use in engineering multifunctional silica optics. This paper reviews the sol-gel process, the Type V dense gel-silica produced by this process and the Type VI ultraporous gel-silica intermediate product. Included is a comparison of two different porous ultrastructures with 1.2 run and 8.0 nm average pore radii. Two uses of the porous gel-silica components as multifunctional optics are described. The first is for use in transpiration cooled windows in highspeed rocket guidance systems. Flow rates of He and N2 through the 1.2 rim and 8. 0 run ultrastructures are as high as 0. 9 m/min at 0. 75 MPa. High temperature UV transmission in contact with an impinging oxy-acetylene flame is demonstrated. Use of Type VI gel-silica as a host matrix for fast radiation-hard scintillating detectors is also reviewed.

Descriptors :   *OPTICS, *TRANSPIRATION, ACETYLENE, CHEMICALS, COMPARISON, DETECTORS, ENGINEERING, FLAMES, FLOW, FLOW RATE, GELS, GUIDANCE, HIGH TEMPERATURE, PAPER, PROCESSING, RATES, ROCKETS, TEMPERATURE, WINDOWS.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE