Alkali-free glass

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United States of America Patent

PATENT NO 9023744
APP PUB NO 20130244859A1
SERIAL NO

13817196

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Abstract

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Provided is an alkali-free glass, which is substantially free of alkali metal oxides, and has a strain point of more than 680° C., an average coefficient of thermal expansion in the temperature range of 30 to 380° C. of 40 to 55×10−7/° C., and a liquidus temperature of less than 1,200° C. Further, the alkali-free glass comprises, as a glass composition in terms of mass %, 55 to 70% of SiO2, 10 to 20% of Al2O3, 0.1 to 4.5% of B2O3, 0 to 1% of MgO, 5 to 15% of CaO, 0.5 to 5% of SrO, and 5 to 15% of BaO.

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Patent Owner(s)

  • NIPPON ELECTRIC GLASS CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawaguchi, Takahiro Shiga, JP 238 2913
Miwa, Shinkichi Shiga, JP 20 355

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