Porous hollow silica-rich fibers and method of producing same

Details Porous hollow silica-rich fibers and method of producing same Porous hollow silica-rich fibers and method of producing same

C - Chemistry, Metallurgy

03

C

49/8

C03C 13/00 (2006.01) C03B 37/075 (2006.01) C03C 25/68 (2006.01)

Patent

CA 1290572

Abstract of the Disclosure 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.

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