Chemically durable nitrogen containing phosphate glasses useful for sealing to metals
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United States of America Patent
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Jun 19, 1984
Grant Date -
N/A
app pub date -
Dec 8, 1982
filing date -
Dec 8, 1982
priority date (Note) -
Expired
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Abstract
The chemical durability of alkali phosphate glasses is improved by incorporation of up to 23 weight percent of nitrogen. A typical phosphate glass contains: 10 to 60 mole % of Li.sub.2 O, Na.sub.2 O or K.sub.2 O; 5-40 mole % of BaO or CAO; 0-1 to 10 mole % of Al.sub.2 O.sub.3 ; and 40-70 mole % of P.sub.2 O.sub.5. Nitrides, such as AlN, are the favored additives.
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