Borosilicate glass containing zinc oxide
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United States of America Patent
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Issued Date -
Apr 22, 2004
app pub date -
Oct 29, 2003
filing date -
Dec 22, 2000
priority date (Note) -
Abandoned
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Abstract
The invention relates to a borosilicate glass containing zinc oxide, which has the following composition (oxide-based in wt. %): 58-67% SiO.sub.2, 1-5% B.sub.2O.sub.3, 0-5% Al.sub.2O.sub.3, 8-17% Na.sub.2O, 0-12% K.sub.2O, 3-12% MgO, 0-12% CaO, 2-8% ZnO, 1-5% TiO.sub.2. The glass is particularly suitable for use as a hard disk substrate.
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