Method of producing porous hollow silica-rich fibers

Details Method of producing porous hollow silica-rich fibers Method of producing porous hollow silica-rich fibers

1986-06-19

1988-10-18

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 31, 501 38, 501 54, C03C 2506

Patent

active

047784997

ABSTRACT:
Porous, hollow, silica-rich fibers with good alkaline tolerance are produced from hollow glass fibers of an alkali metal borosilicate glass having one or more oxides of a metal of Group IV of the Periodic Table in an amount of about 1 to about 20 weight percent of the glass composition. The hollow porous silica-rich fibers are produced by acid leaching where the hollow glass fibers have greater than 25 weight percent extractable components, less than 25 weight percent extractable components but a wall thickness of less than 15 microns, or less than 25 weight percent extractable components and a fiber diameter of less than 25 microns. In addition, heat treating can be used for hollow glass fibers having greater than 25 weight percent extractable components to enlarge the pores.

REFERENCES:
patent: 2494259 (1950-01-01), Nordberg
patent: 3268313 (1966-08-01), Burgman et al.
patent: 4042359 (1977-08-01), Schnaebel et al.

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