Alkali-free sealing glasses for molybdenum

Details Alkali-free sealing glasses for molybdenum Alkali-free sealing glasses for molybdenum

1980-10-08

1981-11-03

Vertiz, O. R.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 21, 501 64, 501 70, C03C 304

Patent

active

042983886

ABSTRACT:
SiO.sub.2 -Al.sub.2 O.sub.3 -alkaline earth oxides glass compositions suitable for glass/molybdenum sealings with high thermal load capability, having coefficients of thermal expansion in the temperature range of 20.degree.-300.degree. C. of 4.6-5.1.times.10.sup.-6 /.degree. C., glass transformation temperatures (Tg) of 775.degree.-810.degree. C., softening temperatures (Ew) greater than 930.degree. C., processing temperatures (V.sub.A) of 1232.degree.-1273.degree. C. and at length of V.sub.A -Ew greater than 300.degree. C. as regards processing technology of these glasses in the mixture, which consist essentially of the following components, computed as percent by oxide weight:

REFERENCES:
patent: 3496401 (1970-02-01), Dumbaugh
patent: 3978362 (1976-08-01), Dumbaugh et al.
patent: 4105826 (1978-08-01), Thomas
patent: 4238705 (1980-12-01), Thomas

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