Sealing materials and glasses

Details Sealing materials and glasses Sealing materials and glasses

1990-10-09

1992-02-18

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 17, 501 19, 501 32, 501 43, C03C 814, C03C 818, C03C 824, C03C 1400

Patent

active

050894463

ABSTRACT:
Mill additions are disclosed which lower the CTE of, and are compatible with, tin-phosphorus oxyfluoride glasses. The sealing materials provide fusion-type seals having a CTE not over about 110.times.10.sup.-7 /.degree.C. and a sealing temperature not over about 350.degree. C.
Also disclosed is a family of glass compositions in the tin-phosphorus oxyfluoride system that exhibit very low glass transition temperatures and coefficients of thermal expansion not over about 160.times.10-7/.degree.C. (25.degree.-150.degree. C.). In addition to the four basic elements, the glasses contain up to 11% Nb, and may additionally contain up to 10%, taken individually or in combination, of V, Fe and/or Mo to further decrease the Tg and CTE values.

REFERENCES:
patent: 3258350 (1966-06-01), Martin
patent: 3907535 (1975-09-01), Muller
patent: 3951669 (1976-04-01), Malmendier et al.
patent: 4186023 (1980-01-01), Dumesnil
patent: 4238704 (1980-12-01), Bonk et al.
patent: 4314031 (1982-02-01), Sanford et al.

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