公开(公告)号：US20220250964A1

公开(公告)日：2022-08-11

申请号：US17591916

申请日：2022-02-03

Applicant: CORNING INCORPORATED

Inventor： Michael John Campion ,  Kenneth Edward Hrdina ,  John Edward Maxon

IPC: C03C3/06 ,  C03B19/06 ,  C03B19/09

Abstract: A silica-titania glass substrate comprising: (i) a composition comprising 5 weight percent to 10 weight percent TiO2; (ii) a coefficient of thermal expansion (CTE) at 20° C. in a range from −45 ppb/K to +20 ppb/K; (iii) a crossover temperature (Tzc) in a range from 10° C. to 50° C.; (iv) a slope of CTE at 20° C. in a range from 1.20 ppb/K2 to 1.75 ppb/K2; (v) a refractive index variation of less than 140 ppm; and (vi) 600 ppm OH group concentration or greater. The substrate can have a mass of 1 kg or greater and less than 0.05 gas inclusions per cubic inch via a method comprising (i) forming the substrate from soot particles comprising SiO2 and TiO2, and (ii) subjecting the substrate to an environment having an elevated temperature and an elevated pressure for a period of time until the substrate comprises less than 0.05 gas inclusions per cubic inch.

公开(公告)号：US20240400441A1

公开(公告)日：2024-12-05

申请号：US18659512

申请日：2024-05-09

Applicant: CORNING INCORPORATED

Inventor： Michael John Campion ,  Ying Liu ,  Johannes Moll

IPC: C03C23/00 ,  C03C3/06 ,  C03C3/078

Abstract: A method of modifying the CTE of a glass body is described, the method including determining a spatial CTE distribution of a ULE glass body including SiO2 in a range from about 80 wt. % to about 99 wt. % and TiO2 in a range from about 4 wt. % to about 11 wt. %, the glass body further including at least a first region and a second region, and directing a pulsed laser beam to at least one of the first region or the second region to modify at least one of a first CTE of the first region or a second CTE of the second region.

公开(公告)号：US20240246850A1

公开(公告)日：2024-07-25

申请号：US18411231

申请日：2024-01-12

Applicant: CORNING INCORPORATED

Inventor： Michael John Campion ,  Sergey Nikolaevich Shubin ,  Pushkar Tandon

IPC: C03B19/14

CPC classification number: C03B19/1453 ,  C03B2201/075

Abstract: A process of forming a titania-silica glass body, the process including exposing a titania-doped silica soot body to a first thermal treatment by heating the body to a first temperature T1 between about 800° C. and about 1100° C. for a first time duration t1 calculated using the equation:






t
⁢
1

>


L
c
2


4
⁢
α



,




wherein Lc is the characteristic length (cm) of the body and α is the thermal diffusivity (cm2/sec) of the body. The process further including exposing the body to a second thermal treatment by heating the body to a second temperature T2 between about 1050° C. and about 1250° C. wherein, after the second thermal treatment, a peak-to-valley difference of hydroxyl concentration amongst a plurality of segments of the body is about 70 ppm or less.

公开(公告)号：US20240067558A1

公开(公告)日：2024-02-29

申请号：US18235934

申请日：2023-08-21

Applicant: CORNING INCORPORATED

Inventor： Michael John Campion ,  Alex Gabriel Duran Buchsbaum ,  John Edward Maxon

IPC: C03C3/076 ,  G03F1/00

CPC classification number: C03C3/076 ,  G03F1/00

Abstract: A glass comprising titania and silica is disclosed. A plot of average hydroxyl concentration of each segment of a plurality of segments vs. distance along the glass is provided by: y=Ax2+Bx+C, wherein A (in ppm/mm2) is in a range from about 0.0 to about −0.1, B (in ppm/mm) is in a range from about −10 to about 10, C (in ppm) is about 450 or less, y is the average hydroxyl concentration (in ppm), and x is distance (in mm) such that the hydroxyl concentration of each segment is measured using a Fourier transform infrared spectroscopy in transmission and the plot extends a distance of about 50 mm or more along the glass.

公开(公告)号：US20240417306A1

公开(公告)日：2024-12-19

申请号：US18673843

申请日：2024-05-24

Applicant: CORNING INCORPORATED

Inventor： Michael John Campion ,  Richard Michael Fiacco ,  Kenneth Edward Hrdina ,  Nicolas LeBlond ,  Dale Robert Powers

IPC: C03C3/06

Abstract: A glass body that includes titania and silica, wherein an average hydroxyl concentration amongst a plurality of segments of the glass body is from about 0 ppm to about 100 ppm and a peak-to-valley of hydroxyl concentration amongst the plurality of segments is about 60 ppm or less, the hydroxyl concentration being measured using a Fourier transform infrared spectroscopy in transmission, and the plurality of segments including every adjacent segment across a length and a width of the glass body, the length being about 25 mm or more and the width being about 25 mm or more, and the glass body comprising a chlorine concentration of about 100 ppm or less.

公开(公告)号：US20240069429A1

公开(公告)日：2024-02-29

申请号：US18235951

申请日：2023-08-21

Applicant: CORNING INCORPORATED

Inventor： Michael John Campion ,  Kenneth Edward Hrdina ,  Nicolas LeBlond ,  John Edward Maxon

IPC: G03F1/24 ,  C03C3/06 ,  C03C3/076 ,  C03C4/08

CPC classification number: G03F1/24 ,  C03C3/06 ,  C03C3/076 ,  C03C4/085 ,  C03C2204/00

Abstract: A glass including silica and titania is disclosed. An average hydroxyl concentration of a plurality segments of the glass is in a range from about 20 ppm to about 450 ppm, an average titania concentration of the plurality of segments is in a range from about 6 wt. % to about 12 wt. %, and each segment of the plurality of segments has a length of about 12.7 mm, a width of about 12.7 mm, and a height of about 7.62 mm. The hydroxyl concentration of each segment is measured using a Fourier transform infrared spectroscopy in transmission, the refractive index is measured using an optical interferometer with a 633 nm operating wavelength and a resolution of 270 microns×270 microns pixel size, and the average titania concentration is determined based upon the measured refractive index.