GLASS MATERIAL FOR CHEMICAL STRENGTHENING, CHEMICALLY STRENGTHENED GLASS AND COVER GLASS

WIPO Patent Application WO/2014/115789

A1

A glass material for chemical strengthening (11) has a temperature of 1150°C or less at a viscosity of logη=4 and a maximum value of average coefficient of linear expansion (α) of less than 1000×10-7/°C in the temperature range of from the glass transition temperature (Tg) to the yield point (At), and comprises glass components, in mol%, of 50-70% (but not including 70%) of SiO2, 4- 8% (but not including 8%) of Al2O3, 0-4% of B2O3, no Li2O, 10-22% (but not including 10%)of Na2O, 0-2% of K2O, 0-5% of ZnO, 5-15% (but not including 5%)of MgO, 0-3% of CaO, 0-5% of SrO, 0-5% of BaO, 0-10% of TiO2, 1.5-7% of ZrO2, 0-0.5% of Sb2O3, and 0-0.5% of CeO2.

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OOGAKI AKIO (JP)
KINOSHITA MASAYA (JP)

PCT/JP2014/051325

July 31, 2014

January 23, 2014

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KONICA MINOLTA INC (JP)

C03C3/085; C03C3/087; C03C3/093; C03C3/095; C03C21/00

US4119760A	1978-10-10
JP2010168252A	2010-08-05
JP5051329B2	2012-10-17
JP2009057271A	2009-03-19
JP2012214356A	2012-11-08

SANO SHIZUO (JP)
Shizuo Sano (JP)

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