公开(公告)号：CA2037102A1

公开(公告)日：1992-02-17

申请号：CA2037102

申请日：1991-02-26

Applicant: CORNING INC

Inventor： DOBBINS MICHAEL S ,  MCLAY ROBERT E

IPC: C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  G02B6/00

公开(公告)号：CA2062882A1

公开(公告)日：1993-02-27

申请号：CA2062882

申请日：1992-03-12

Applicant: CORNING INC

Inventor： BLACKWELL JEFFERY L ,  DOBBINS MICHAEL S ,  MCLAY ROBERT E ,  TRUESDALE CARLTON M

IPC: C03B37/018 ,  C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03C3/06 ,  C07F7/08 ,  C07F7/10 ,  G02B6/00 ,  C03C17/30 ,  C09D1/00 ,  C03C13/04 ,  G02B6/10 ,  C03C17/245

Abstract: This invention relates to the production of high purity fused silica glass through oxidation and/or flame hydrolysis of a halide-free, organosilicon-R compound in vapor form having the following properties: (a) producing a gas stream of a halide-free siliconcontaining compound in vapor form capable of being converted through thermal decomposition with oxidation or flame hydrolysis to SiO2; (b) passing said gas stream into the flame of a combustion burner to form amorphous particles of fused SiO2; (c) depositing said amorphous particles onto a support; and (d) either essentially simultaneously with said deposition or subsequently thereto consolidating said deposit of amorphous particles into a virtually nonporous body; the improvement comprising utilizing a halide-free, organosilicon-R compound in vapor form having the following properties: (1) a Si-R bond dissociation energy that is no higher than the dissociation energy of the Si-O bond; (2) a boiling point no higher than 350.degree.C; and (3) which, upon pyrolysis and/or hydrolysis, will produce decomposition products beside SiO2 which are deemed to be environmentally safe or the emissions are below acceptable governmental standards.

公开(公告)号：EP1296899A4

公开(公告)日：2004-11-17

申请号：EP01928353

申请日：2001-04-03

Applicant: CORNING INC

Inventor： ARAUJO ROGER J ,  BORRELLI NICHOLAS F ,  MCLAY ROBERT E ,  SEMPOLINSKI DANIEL R ,  SMITH CHARLENE M

IPC: G02B1/00 ,  C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  C03C3/06 ,  G03F7/20

CPC classification number: G03F7/70958 ,  C03B19/1407 ,  C03B19/1423 ,  C03B2201/21 ,  C03B2207/06 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/32 ,  C03B2207/36 ,  C03B2207/50 ,  C03C3/06 ,  C03C2201/21 ,  C03C2203/40

Abstract: An optical member includes a fused silica glass having a concentration of =SiH moiety below detection limit as measured by Raman spectroscopy and a concentration of molecular hydrogen of at least 1x1017 molecules/cm3. The fused silica glass exhibits an induced absorption level which quickly attains an initial peak upon exposure to irradiation and rapidly decays to a low value. The induced absorption level after decaying to the low value remains substantially unchanged by further irradiation.

公开(公告)号：EP1332116A4

公开(公告)日：2005-04-13

申请号：EP01968806

申请日：2001-09-12

Applicant: CORNING INC

Inventor： BROWN JOHN T ,  DOBBINS MICHAEL S ,  HECKLE CHRISTINE E ,  MCLAY ROBERT E ,  MISRA MAHENDRA K ,  POWERS DALE R ,  WASILEWSKI MICHAEL H

IPC: C03B8/04 ,  C03B19/14 ,  C03B20/00

CPC classification number: C03B19/1423 ,  C03B19/1415 ,  C03B2201/03 ,  C03B2201/07 ,  C03B2201/21 ,  C03B2201/23 ,  C03B2207/06 ,  C03B2207/12 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/32 ,  C03B2207/36

Abstract: A method for preparing high-purity, bulk fused silica includes supplying silane gas (11), a gaseous fuel (8), and oxygen gas (10B) to a combustion burner (14). A fuel and oxygen mixture (13) is produces when fuel (8) and oxygen gas (10A) in a premixing chamber (12). Nitrogen gas (17A) may also be supplied to the burner (14) which is located in the crown (16) of a furnace (15). Silica particles are formed by passing the silane gas into a flame formed by the combustion reaction of the gaseous fuel with the oxygen gas while maintaining the ratio of the flow rate of the gaseous fuel to the flow rate of the silane gas no less than twelve and the ratio of the flow rate of the gaseous fuel to the flow rate of the oxygen gas no less than three. Silane flow rates are controlled with a mass flow controller (51) and the flow of other gasses is monitored with flow meters (49). The silica particles formed are immediately deposited onto a hot bait (18) inside a containment vessel (21) to form a boule (19).