Lead-free low softening point glass
AssigneeTokan Material Technology Co., Ltd.
InventorHirohisa Masuda
Life of this patent
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Abstract
Disclosed is a lead-free low softening point glass whose composition lies within the system SnO—P2O5 and containing over 5 to 30 mol % of MnO. The addition of MnO allows the water resistance and coefficient of thermal expansion of the glass to be improved without spoiling its feature of a low softening point. The lead-free low softening point glass can be prepared through a simplified production process.
Claims7
1-5. (canceled)
A lead-free low softening point glass consisting of 30 to 70 mol % of SnO 20 to 50 mol % of P2O5, and over 5 to 30 mol % of MnO, and one or more additives selected from the group consisting of an alkali metal compound, an alkaline earth metal compound, a transition metal compound, aluminum oxide (Al2O3, iron oxide (Fe2O3) gallium oxide (GaO3), and antimony oxide (Sb2O3), in a total amount of 10 mol % or less.
7-8. (canceled)
The lead-free low softening as additives Li2O and Na2O.
Dependencies are inferred from the claim text.