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US 2003/0125185 A1Published application
Glass composition and glass forming material comprising said composition
AssigneeNoritake Co., Limited
InventorJun Hirose
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AssigneeNoritake Co., Limited
InventorJun Hirose
Estimating the term…
The present invention provides glass compositions that can be used instead of known glass compositions containing a large amount of PbO in applications such as coating ceramic substrates, e.g., alumina, or sealing fluorescent tubes or the like. The invention also provides glass forming materials containing the glass compositions as a primary component for glass formation. Glass compositions provided by the present invention are comprises essentially of primary oxide components. The primary oxide components include ZnO, B2O3 and P2O5 as essential components and Al2O3, MgO, CaO and BaO as optional components. The amount of the primary oxide components is 85 wt % or more (preferably 90 wt % or more) of the total weight of the glass composition. Typically, the primary oxide components include 45 to 80% of ZnO, 5 to 45% of B2O3, 1 to 35% of P2O5, 0 to 10% of Al2O3, 0 to 15% of MgO, 0 to 10% of CaO, and 0 to 5% of BaO.
A glass composition comprising primary oxide components in an amount of 85% or more of the total weight of the composition, the primary oxide components including ZnO, B2O3 and P2O5 as essential components, the primary oxide components comprising the following oxides in the following proportions by weight:
A glass composition, which is substantially free of lead oxides and comprises primary oxide components in an amount of 90% or more of the total weight of the composition, the primary oxide components including ZnO, B2O3 and P2O5 as essential components, the primary oxide components comprising the following oxides in the following proportions by weight:
A glass forming material comprising a glass composition as a glass forming component,
A glass forming material comprising a glass composition as a glass forming component,
Dependencies are inferred from the claim text.