Sealing composition and sealing method

Details Sealing composition and sealing method Sealing composition and sealing method

1981-05-11

1982-04-20

Vertiz, O. R.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

427279, C03C 312

Patent

active

043260381

ABSTRACT:
A sealing composition consisting of 35-50% by weight of aluminum oxide, 35-50% by weight of calcium oxide, 1-10% by weight of yttrium oxide and 1-15% by weight of strontium oxide has a high wettability with alumina ceramics and refractory metal, and further has high heat resistance and resistance against sodium vapor. The sealing composition is excellent for sealing alumina arc tubes for high intensity discharge lamps with ceramics or refractory metal. Included within the scope of the invention is a composition consisting of 40-50% by weight of aluminum oxide, 35-43% by weight of calcium oxide, 3-10% by weight of yttrium oxide and 8-15% by weight of strontium oxide, as well as methods for using the compositions.

REFERENCES:
patent: 2876120 (1959-03-01), Machlan
patent: 3441421 (1969-04-01), Sarver et al.
patent: 3448319 (1969-06-01), Louden
patent: 3469729 (1969-09-01), Grekils et al.
patent: 3545639 (1970-12-01), Charles et al.
patent: 3588573 (1971-06-01), Chen et al.
patent: 4076991 (1978-02-01), Datta

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