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Title:
METHOD FOR PRODUCING GLASS MATERIAL, DEVICE FOR PRODUCING GLASS MATERIAL, AND GLASS MATERIAL
Document Type and Number:
WIPO Patent Application WO/2016/199239
Kind Code:
A1
Abstract:
Provided is a method that makes it possible to stably produce a glass material containing no crystals by containerless levitation. A glass material 30 comprises a first surface 31 facing a molding surface 10a and a second surface 32 positioned on the opposite side from the molding surface 10a. The first surface 31 comprises a central section 31a and a peripheral section 31b positioned on the outside of the central section 31. Gas is jetted out from a gas jetting hole at a flow speed and a flow rate that cause a glass material satisfying R2 < R3 < R1 to be formed when the radius of curvature of the central section 31a is denoted by R1, the radius of curvature of the peripheral section 31b is denoted by R2, and the radius of curvature of the second surface 32 is denoted by R3.

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Inventors:
SATO FUMIO (JP)
YAMADA TOMOKO (JP)
INOUE HIROYUKI (JP)
MASUNO ATSUNOBU (JP)
Application Number:
PCT/JP2015/066710
Publication Date:
December 15, 2016
Filing Date:
June 10, 2015
Export Citation:
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Assignee:
NIPPON ELECTRIC GLASS CO (JP)
UNIV TOKYO (JP)
International Classes:
C03B19/10; C03B5/235
Domestic Patent References:
WO2008032789A12008-03-20
WO2010137276A12010-12-02
Foreign References:
JP2015040145A2015-03-02
JP2006248801A2006-09-21
JP2014196236A2014-10-16
JP2015129061A2015-07-16
Attorney, Agent or Firm:
NAKAYAMA, KAZUTOSHI (JP)
Kazutoshi Nakayama (JP)
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