Back to results
US 2004/0239227 A1Published application
Joined bodies, luminous containers and assemblies for high pressure discharge lamps
AssigneeNGK Insulators, Ltd.
InventorNorikazu Niimi
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNGK Insulators, Ltd.
InventorNorikazu Niimi
Estimating the term…
An object of the present invention is to provide a joined body of a first member comprising a first joining face and sapphire exposed at the first joining face and a second member comprising a second joining face and sapphire or polycrystalline alumina exposed at the second joining face, so that the joining strength can be improved and crack formation along the joining interface can be prevented. The first member 2 and second members 4A, 4B are joined with each other by providing a raw material for the joining material between the first and second members and heat treating the raw material at a temperature of 1730° C. or lower. Alternatively, The joining materials 5A, 5B comprise an oxide or an oxynitride containing a rare earth element, aluminum and silicon, and wherein the oxide or oxynitride has a silicon content of 3 mole percent or higher and 10 mole percent or lower calculated as silicon dioxide.
A joined body comprising a first member comprising a first joining face and sapphire exposed at said first joining face, a second member comprising a second joining face and sapphire or polycrystalline alumina exposed at said second joining face, and a joining material joining said first and second members;
A joined body comprising a first member comprising a first joining face and sapphire exposed at said first joining face, a second member comprising a second joining face and sapphire or polycrystalline alumina exposed at said second joining face, and a joining material joining said first and second members;
A luminous container comprising a discharge vessel comprising sapphire and an end portion with an opening formed therein and a sealing member fixed at said end portion of said vessel, wherein said sealing member comprises a joining face and sapphire or polycrystalline alumina exposed at said joining face, and wherein c-axis of said sapphire constituting said discharge vessel and the central axis of said vessel are intersected at an angle of 10° or lower.
Dependencies are inferred from the claim text.