Ceramic discharge vessel having a sealing composition

Details Ceramic discharge vessel having a sealing composition Ceramic discharge vessel having a sealing composition

2007-02-26

2010-06-22

Ton, Toan (Department: 2889)

Electric lamp and discharge devices

With gas or vapor

Envelope composition

Reexamination Certificate

active

07741780

ABSTRACT:
A sealing composition for ceramic discharge vessels is described. The sealing composition contains about 20 to about 40 mole percent MgO, about 20 to about 45 mole percent Y2O3, and about 20 to about 60 mole percent Al2O3and has a melting point of less than about 1800° C., and preferably from about 1700° C. to about 1800° C. The sealing composition may be used for making ceramic-to-ceramic or ceramic-to-metal seals in ceramic discharge vessels.

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Obtained the ACerS-NIST Phase Equilibria Diagrams, vol. XIII (2001), pp. 290-291of Sigalov et al.

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