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1. (WO1997011919) ALKALI-FREE GLASS SUBSTRATE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1997/011919    International Application No.:    PCT/JP1996/002750
Publication Date: 03.04.1997 International Filing Date: 25.09.1996
IPC:
C03C 3/091 (2006.01), C03C 3/093 (2006.01)
Applicants: NIPPON ELECTRIC GLASS CO., LTD. [JP/JP]; 7-1, Seiran 2-chome, Otsu-shi, Shiga 520 (JP) (For All Designated States Except US).
MIWA, Shinkichi [JP/JP]; (JP) (For US Only)
Inventors: MIWA, Shinkichi; (JP)
Agent: GOTO, Yosuke; The Third Mori Building, 4-10, Nishishinbashi 1-chome, Minato-ku, Tokyo 105 (JP)
Priority Data:
7/276759 28.09.1995 JP
Title (EN) ALKALI-FREE GLASS SUBSTRATE
(FR) SUBSTRAT DE VERRE EXEMPT D'ALCALIS
Abstract: front page image
(EN)An alkali-free glass substrate that is substantially free from any alkali metal oxide, has a chemical resistance and a high strain point, is excellent in meltability and moldability, has a density of at most 2.6 g/cm?3¿, and comprises on the weight basis 50.0 to 57.9 % SiO¿2?, 10.0 to 25.0 % Al¿2?O¿3?, 3.0 to 12.0 % B¿2?O¿3?, 0 to 2.0 % MgO, 0 to 10.0 % CaO, 0.1 to 5.0 % BaO, 0.1 to 15.0 % SrO, 0 to 5.0 % ZnO, 0 to 5.0 % ZrO¿2?, and 0 to 5.0 % TiO¿2?.
(FR)Ce substrat de verre exempt d'alcalis, pratiquement exempt de tout oxyde métallique alcalin, présente une résistance chimique et un point de déformation élevés, ainsi qu'une excellente aptitude à la fusion et au moulage et une densité de 2,6 g/cm?3¿ au plus. Il comprend les pourcentages de poids suivants: SiO¿2?: 50-57,9; Al¿2?O¿3?: 10-25; B¿2?O¿3?: 3-12; MgO: 0-2; CaO: 0-10; BaO: 0,1-5; SrO: 0,1-15; ZnO: 0-5; ZrO¿2?: 0-5 et TiO¿2?: 0-5.
Designated States: DE, JP, KR, US.
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)