Patent ID: 6358871
Filing Date: 2002-03-19
Classification: B01D,C03C,Y10T

Abstract:
A low-boron, high-barium filter comprising:glass fibers comprising, about 0 to 1 weight percent boric oxide; from about 6 to about 16 weight percent barium oxide; from about 10 to about 14.5 percent R2O, wherein R2O is a mixture of sodium oxide and potassium oxide; from about 4 to 8 weight percent alumina; from about 1 to about 9 weight percent calcium oxide and magnesium oxide; from about 2 to about 6 weight percent zinc oxide; from about 0.5 to about 1.5 weight percent fluorine; a balance of the glass fibers being silica; and wherein the glass fibers have an average diameter of from about 0.1 &mgr;m to about 8.15 &mgr;m.