Patent ID: 9266764
Filing Date: 2016-02-23
CPC Classification: C03B,C03C

Claim Text:
1. A method of forming hollow microspheres comprising dispensing a feed with a dispenser, heating the feed using conditions sufficient to convert at least a portion of the feed into hollow microspheres, wherein the dispensing is conducted using vibratory energy, wherein the feed comprises (a) between 50 wt % and 90 wt % of SiO (b) between 2 wt % and 20 wt % of alkali metal oxides; (c) between 1 wt % and 30 wt % of B (d) between 0 wt % to 0.5 wt % of sulfur; (e) between 0 wt % and 25 wt % divalent metal oxides; (f) between 0 wt % and 10 wt % of tetravalent metal oxides other than SiO (g) between 0 wt % and 20 wt % of trivalent metal oxides; (h) between 0 wt % and 10 wt % of oxides of pentavalent atoms; and (i) between 0 wt % and 5 wt % fluorine.