# US 8,541,325 B2 · Low expansivity, high transmission titania doped silica glass > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,325 B2 - Document ID: US8541325B2 - Status: Granted - Kind: B2 - Application number: 13/028,472 - Filed: 2011-02-16 - Published: 2011-08-25 - Granted: 2013-09-24 - Earliest claimed: 2010-02-25 - Assignees: Corning Incorporated - Applicants: Carlos Duran; Kenneth Edward Hrdina; Michael A Mueller - Inventors: Carlos Duran; Kenneth Edward Hrdina; Michael A Mueller - Web page: https://patentgrep.com/patent/US8541325B2 ## CPC - C03C 3/06: with more than 90% silica by weight, e.g. quartz {(C03C3/045 takes precedence)} - B82Y 10/00: Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic - B82Y 40/00: Manufacture or treatment of nanostructures - C03B 19/1407: {Deposition reactors therefor} - C03B 19/1415: {Reactant delivery systems} - C03B 19/1453: {Thermal after-treatment of the shaped article, e.g. dehydrating, consolidating, sintering} - C03C 4/0071: {for laserable glass} - C03C 4/0085: {for UV-transmitting glass} - G03F 1/60: Substrates - G03F 7/0002: {Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping} - G03F 7/70958: {Optical materials or coatings, e.g. with particular transmittance, reflectance or anti-reflection properties} - C03B 2201/21: doped with molecular hydrogen - C03B 2201/23: doped with hydroxyl groups - C03B 2201/42: doped with titanium - C03C 2201/21: containing molecular hydrogen - C03C 2201/23: containing hydroxyl groups - C03C 2201/42: containing titanium - C03C 2203/40: Gas-phase processes - C03C 2203/52: Heat-treatment - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES - G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G) ## Abstract In one embodiment the present disclosure is directed to a silica-titania glass with an internal transmission of >90%/cm at wavelengths from 340 nm to 840 nm. In another embodiment the internal transmission is >93%/cm at wavelengths from 340 nm to 840 nm. In a further embodiment the internal transmission is >95%/cm at wavelengths from 340 nm to 840 nm. In another embodiment the disclosure is directed to a silica-titania glass with an overall transmission through an optic made of the glass is >84% at wavelengths from 340 nm to 840 nm. In another embodiment overall transmission through an optic made of the glass is >86% at wavelengths from 340 nm to 840 nm. In a further embodiment the overall transmission through an optic made of the glass is >88% at wavelengths from 330 nm to 840 nm. In a further embodiment the silica-titania glass has a Ti+3 concentration level [Ti3+] less than 3 ppm by weight. ## Claims ### Claim 1 A silica-titania glass consisting of 7-10 wt. % titania and 90-93 wt. % silica and said glass has an internal transmission of greater than 95%/cm over the wavelength range of 340 nm to 840 nm, a fictive temperature less than 900° C. in combination with greater than 600 ppm [OH] by weight, and said glass having a hydrogen (H2) concentration of less than 2×1017 hydrogen molecules/cm3. ### Claim 2 (depends on 1) The silica-titania glass according to claim 1, wherein said glass consists of 7.5-8.5 wt. % titania and 91.5-92.5 wt. % silica. ### Claim 3 (depends on 1) The silica-titania glass according to claim 1, wherein said glass has an expansivity slope at 20° C. of less than 1.5 ppb/° K2. ### Claim 4 (depends on 2) The silica-titania glass according to claim 2, wherein said glass has an expansivity slope at 20° C. of less than 1.5 ppb/° K2. ### Claim 5 (depends on 1) The silica-titania glass according to claim 1, wherein said glass has an expansivity slope at 20° C. of less than 1.2 ppb/° K2. ### Claim 6 (depends on 2) The silica-titania glass according to claim 2, wherein said glass has an expansivity slope at 20° C. of less than 1.2 ppb/° K2. ### Claim 7 (depends on 1) The silica-titania glass according to claim 1, wherein the silica-titania glass has a Ti+3 concentration level [Ti3+] less than 3 ppm by weight. ### Claim 8 (depends on 2) The silica-titania glass according to claim 2, wherein the silica-titania glass has a Ti+3 concentration level [Ti3+] less than 3 ppm by weight. ### Claim 9 (depends on 1) The silica-titania glass according to claim 1, wherein said glass has an internal transmission of greater than 95%/cm in the wavelength range of 330 nm to 840 nm. ### Claim 10 (depends on 2) The silica-titania glass according to claim 2, wherein said glass has an internal transmission of greater than 95%/cm in the wavelength range of 330 nm to 840 nm. ### Claim 11 (depends on 2) The silica-titania glass according to claim 2, wherein said glass has a fictive temperature of less than 890° C. in combination with greater than 600 ppm [OH] by weight. ### Claim 12 (depends on 2) The silica-titania glass according to claim 2, wherein said glass has a fictive temperature of less than 880° C. in combination with greater than 600 ppm [OH] by weight. ### Claim 13 A silica-titania glass consisting of 7-10 wt. % titania and 90-93 wt. % silica and said glass has an internal transmission of greater than 95%/cm in the wavelength range of 340 nm to 840 nm, a fictive temperature less than 900° C. in combination with greater than 600 ppm a [OH] by weight, and said glass having a hydrogen (H2) concentration of less than 2×1016 hydrogen molecules/cm3. ### Claim 14 A silica-titania glass consisting of 7-10 wt. % titania and 90-93 wt. % silica and said glass has an internal transmission of greater than 95%/cm in the wavelength range of 340 nm to 840 nm, a fictive temperature less than 900° C. in combination with greater than 600 ppm [OH] by weight, and said glass having a hydrogen (H2) concentration of less than 0.1×1017 hydrogen molecules/cm3. ### Claim 15 (depends on 1) An optic comprising the glass of claim 1.