Sealing composition for sealing aluminum nitride and aluminum oxynitride ceramics
AssigneeOsram Sylvania Inc.
InventorsYi Zheng, Richard C. Marlor, George C. Wei
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Abstract
There is described a sealing composition for sealing aluminum nitride and aluminum oxynitride ceramics comprising: a mixture of SiO2, at least one other metal oxide, and a silicon additive comprising at least one of silicon metal or a silicide. The silicon additive acts to suppress the formation of nitrogen bubbles during the sealing of articles comprised of aluminum nitride or aluminum oxynitride ceramics, e.g., as in the case of a ceramic discharge vessel for a high intensity discharge lamp.
Claims15
A ceramic discharge vessel, comprising:
- a hollow ceramic body comprised of an aluminum nitride or an aluminum oxynitride ceramic, the discharge vessel being sealed with a sealing composition comprising:
- a mixture of SiO2, at least one other metal oxide, and a silicon additive comprising at least one of silicon metal or a silicide.
A ceramic discharge vessel, comprising a hollow ceramic body comprised of an aluminum nitride or an aluminum oxynitride ceramic, the discharge vessel being sealed with a sealing composition comprising:
- a mixture of SiO2, at least one other metal oxide selected from Al2O3, Dy2O3, CeO2, Gd2O3, Y2O3, Eu2O3, Tm2O3, Ho2O3, CaO, MgO, BaO, La2O3, V2O5, WO3, MoO3 and ZrO2, and a silicon additive comprising at least one of silicon metal or a silicide of W, Mo, Ta, Nb, Pd, Re, Pt, or Rh, the mixture containing at least 1 percent SiO2 by weight.
Dependencies are inferred from the claim text.