公开(公告)号：US20230081248A1

公开(公告)日：2023-03-16

申请号：US17940639

申请日：2022-09-08

Applicant: Schott AG

Inventor： Olaf Claußen ,  Steffen Grün ,  Thomas Lifka ,  André Schrepfer

IPC: C03B5/225 ,  C03C10/00 ,  C03C1/00 ,  C03B32/02 ,  C03B5/235

Abstract: A method for producing a glass ceramic includes: providing a batch of raw materials; heating the batch of raw materials until a melt is obtained, the batch of raw materials being heated at least in a plurality of sections to a temperature above T3 which corresponds to a viscosity of a molten glass of 103 dPa*s; refining the melt, the melt being heated at least in a plurality of sections to a temperature above T2.5 which corresponds to a viscosity of the molten glass of 102.5 dPa*s; obtaining a refined glass which is configured for being ceramized to form a glass ceramic material; and ceramizing a glass which is configured for being ceramized to form the glass ceramic material, at least one of the step of heating until the melt is obtained and the step of refining being performed with heating by way of H2 and O2 combustion.

公开(公告)号：US20230074664A1

公开(公告)日：2023-03-09

申请号：US17940432

申请日：2022-09-08

Applicant: Schott AG

Inventor： Olaf Claußen ,  Steffen Grün ,  Thomas Lifka ,  André Schrepfer

IPC: C03C1/00 ,  C03C10/00 ,  C03B32/02 ,  C03B5/235 ,  C03B5/225

Abstract: A method for melting and/or refining glass, glass ceramic or glass which can be ceramized to form glass ceramic includes: providing a batch of raw materials; heating the batch until a melt of molten glass is obtained, the batch being heated at least in sections to a temperature above T3 which corresponds to a viscosity of the molten glass of 103 dPa*s; refining the melt, the melt being heated at least in sections to a temperature above T2.5 which corresponds to a viscosity of the molten glass of 102.5 dPa*s, refining of the melt includes adjusting an oxygen partial pressure p(O2) which is reduced by at least 60% relative to an O2 saturation in the melt at temperature T3; and obtaining a re-fined glass, a refined glass ceramic or a refined glass which can be ceramized to form glass ceramic.

公开(公告)号：US20220298062A1

公开(公告)日：2022-09-22

申请号：US17654822

申请日：2022-03-15

Applicant: SCHOTT AG

Inventor： Ina Mitra ,  Olaf Claußen ,  Clemens Kunisch ,  Antoine Carré

IPC: C03C10/00 ,  C03B27/012

Abstract: The present invention relates to a glass ceramic having improved thermal expansion characteristics and to the use thereof in a precision component.