Title:
GLASS COMPOSITION AND GLASS SUBSTRATE
Document Type and Number:
WIPO Patent Application WO/2007/058205
Kind Code:
A1
Abstract:
A glass composition that can optically replace, for example, conventional cover
glass, and that exhibits high ultraviolet transmission in the region of 250 to
260 nm wavelength. There is provided a glass composition containing, as a fundamental
glass formulation, expressed by mass proportion per hundred or mass proportion
per million, 60 to 79% SiO2, over 0 to 10% Al2O3,
0 to 10% Li2O, 5 to 25% Na2O, 0 to 15% K2O, 0 to 10%
MgO, 0 to 15% CaO, 0 to 15% SrO, 0 to 15% BaO, 0.5 to 20 ppm T-Fe2O3
(provided that T-Fe2O3 is the content of all iron oxides
expressing all iron compounds in terms of Fe2O3) and 0 to
200 ppm TiO2, which glass composition is characterized by having a
refractive index (nd) of 1.519 to 1.530.
Inventors:
NIIDA HARUKI (JP)
KOYAMA AKIHIRO (JP)
KOYAMA AKIHIRO (JP)
Application Number:
PCT/JP2006/322747
Publication Date:
May 24, 2007
Filing Date:
November 15, 2006
Export Citation:
Assignee:
NIPPON SHEET GLASS CO LTD (JP)
NIIDA HARUKI (JP)
KOYAMA AKIHIRO (JP)
NIIDA HARUKI (JP)
KOYAMA AKIHIRO (JP)
International Classes:
C03C3/083; C03C3/085; C03C3/087; C03C3/11; C03C3/112
Foreign References:
| JPS4816911A | ||||
| JPH02252636A | 1990-10-11 | |||
| JPH0656466A | 1994-03-01 | |||
| JP2005162600A | 2005-06-23 | |||
| JP2005053712A | 2005-03-03 | |||
| JP2003279860A | 2003-10-02 | |||
| JPH09292570A | 1997-11-11 |
Attorney, Agent or Firm:
KAMADA, Koichi et al. (TOMOE MARION BLDG. 4-3-1, Nishitenma, Kita-ku, Osaka-sh, Osaka 47, JP)
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