Chemically durable nitrogen containing phosphate glasses useful

Details Chemically durable nitrogen containing phosphate glasses useful Chemically durable nitrogen containing phosphate glasses useful

1982-12-08

1984-06-19

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65 32, 65 591, 501 24, 501 42, 501 46, 501 47, 501 48, 501 73, 501 27, C03C 316

Patent

active

044553846

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.

REFERENCES:
patent: 3709723 (1973-01-01), Watanabe et al.
patent: 3856494 (1974-12-01), Kitano et al.
patent: 3930873 (1976-01-01), Kaes et al.
patent: 4070198 (1978-01-01), Chyung et al.
patent: 4123248 (1978-10-01), Drake
patent: 4202700 (1980-05-01), Wilder

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