Title:
ALKALI-FREE GLASS, ALKALI-FREE GLASS SUBSTRATE, AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/136054
Kind Code:
A1
Abstract:
A glass composition is designed which satisfies various properties required of glasses for liquid-crystal displays, etc., especially satisfies properties such as meltability and unsusceptibility to devitrification, and which is reduced in the content of ingredients harmful to the environment or contains substantially none of such ingredients. A glass substrate less harmful to the environment is obtained therefrom. The alkali-free glass is characterized by having a glass composition which comprises, in terms of oxide amount in wt.%, 50-70% SiO2, 10-20% Al2O3, 8-12% B2O3, 0-3% MgO, 4-15% CaO, 0-10% SrO, 0-1% BaO, and 0-5% ZnO and containing substantially none of the alkali metal oxides and As2O3.
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Inventors:
MIWA SHINKICHI (JP)
YANASE TOMOKI (JP)
YANASE TOMOKI (JP)
Application Number:
PCT/JP2007/060418
Publication Date:
November 29, 2007
Filing Date:
May 22, 2007
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO (JP)
MIWA SHINKICHI (JP)
YANASE TOMOKI (JP)
MIWA SHINKICHI (JP)
YANASE TOMOKI (JP)
International Classes:
C03C3/091; C03B17/06; C03C3/093; G02F1/1333
Domestic Patent References:
| WO1997011919A1 | 1997-04-03 |
Foreign References:
| JPH09169539A | 1997-06-30 | |||
| JP2004189535A | 2004-07-08 | |||
| JP2001151534A | 2001-06-05 | |||
| JP2002531360A | 2002-09-24 |
Attorney, Agent or Firm:
EHARA, Syogo et al. (15-26 Edobori 1-chome,Nishi-ku, Osaka-sh, Osaka 02, JP)
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