US 11,724,955 B2
Superomniphobic bulk optical glass
John T. Simpson, Sahuarita, AZ (US)
Assigned to Waymo LLC, Mountain View, CA (US)
Filed by Waymo LLC, Mountain View, CA (US)
Filed on Jul. 29, 2020, as Appl. No. 16/942,632.
Prior Publication US 2022/0033295 A1, Feb. 3, 2022
Int. Cl. C03C 3/06 (2006.01); C03C 15/00 (2006.01); C03C 17/30 (2006.01); C03C 3/089 (2006.01); C03C 4/00 (2006.01); C03C 23/00 (2006.01)
CPC C03C 3/061 (2013.01) [C03C 3/089 (2013.01); C03C 4/00 (2013.01); C03C 15/00 (2013.01); C03C 17/30 (2013.01); C03C 23/0095 (2013.01); C03C 2204/00 (2013.01); C03C 2217/76 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for preparing a glass composition, comprising
heating a borosilicate glass comprising 45-85 wt. % silicon oxide and 10-40 wt. % boron oxide to form a phase-separated glass comprising an interpenetrating network of silicon oxide domains and boron oxide domains;
removing at least a portion of the boron oxide domains from the phase-separated glass and depositing a hydrophobic silane to provide a porous glass having
a hydrophobic silane layer disposed on a portion of the surface thereof;
a total pore volume of 15-50 vol. %; and
an average pore diameter of 20-300 nm;
within at least a portion of the pore volume of the porous glass, forming an aerogel precursor; and
converting at least a portion of the aerogel precursor to an aerogel.
 
13. A glass composition prepared according to a method comprising:
heating a borosilicate glass comprising 45-85 wt. % silicon oxide and 10-40 wt. % boron oxide to form a phase-separated glass comprising an interpenetrating network of silicon oxide domains and boron oxide domains;
removing at least a portion of the boron oxide domains from the phase-separated glass and depositing a hydrophobic silane to provide a porous glass having
a hydrophobic silane layer disposed on a portion of the surface thereof;
a total pore volume of 15-50 vol. %; and
an average pore diameter of 20-300 nm;
within at least a portion of the pore volume of the porous glass, forming an aerogel precursor; and
converting at least a portion of the aerogel precursor to an aerogel.
 
14. A glass composition comprising an interpenetrating network of silicon oxide domains and aerogel domains, wherein
the aerogel comprises 15-50 vol. % of the composition;
the silicon oxide comprises 45-85 vol. % of the composition; and
the average size of the aerogel domains is 20-300 nm.