Title:
不透明な石英ガラスを製造する方法および該石英ガラスのブランク材
Document Type and Number:
Japanese Patent JP6869168
Kind Code:
B2
Abstract:
In one method for producing opaque quartz glass, a green body is produced from a slip containing fine, amorphous SiO2 particles and coarse SiO2 reinforcement bodies and the green body is sintered by way of a sintering treatment into a blank made from the opaque quartz glass. The reinforcement bodies with a specific density DK1 are here embedded in a SiO2 matrix with a specific glass density DM. Starting from this, in order to provide a blank of opaque quartz glass that is less susceptible to cracking and illustrates homogeneous transmission even in the case of small wall thicknesses, in one aspect sinterable reinforcement bodies are used, the specific density DK0 of which prior to the sintering treatment is lower than the specific glass density DM, and which due to the sintering treatment reach the specific density DK1 which differs from the specific glass density DM by less than 10%.
Inventors:
Christian Schenck
Gerito Schaich
Nadine Choricci
Gerito Schaich
Nadine Choricci
Application Number:
JP2017244314A
Publication Date:
May 12, 2021
Filing Date:
December 20, 2017
Export Citation:
Assignee:
Heraeus Quarzglas GmbH & Co. KG
International Classes:
C03B20/00
Domestic Patent References:
| JP2002362932A | ||||
| JP2004131380A | ||||
| JP2016536254A | ||||
| JP2010508232A |
Foreign References:
| US5389591 |
Other References:
A Statistical Analysis of the Influence of Processing Condition on the Properties of Fused Silica,Journal of the Europen Ceramic Society,1996年,Volume 16,p857-864
Fabrication of transparent SiO2 glass by pressureless sintering and spark plasma sintering,Ceramics Internationsl,2012年,Volume 38,p2676-2678
Fabrication of transparent SiO2 glass by pressureless sintering and spark plasma sintering,Ceramics Internationsl,2012年,Volume 38,p2676-2678
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Morita Taku
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima
Morita Taku
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima