Joined bodies, high pressure discharge lamps and assemblies therefor
AssigneeNGK Insulators, Ltd.
InventorNorikazu Niimi
Life of this patent
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Abstract
The present invention provides a joined body having a first member 7, a second member 4 and a joining material 14 interposed between the first and second members. The joining material has a porous bone structure 15 with open pores and made of a sintered product of metal powder and impregnated phase 10 impregnated into the open pores. The impregnated phase 10 includes an oxynitride glass. The joined body has improved resistance against fatigue and fracture, even when the body is subjected to thermal cycles between high and room temperatures and held at a high temperature over a long period of time.
Claims30
A joined body comprising a first member, a second member and a joining material between said first and second members, said joining material comprising a porous bone structure with open pores formed therein and made of a sintered product of metal powder and impregnated phase impregnated into said open pores of said structure, said impregnated phase comprising an oxynitride glass.
An assembly for a high pressure discharge lamp comprising:
- a ceramic discharge vessel with an inner space formed therein and end portions, an ionizable light-emitting material and a starter gas being to be contained in said inner space, and an opening being formed in said end portion;
- a sealing member comprising a through hole formed therein, at least a part of said sealing member being fixed in said opening of said ceramic discharge vessel;
- an electrode system provided in said inner space:
- a metal member;
- and
- a joining material for joining said metal member and said sealing member, said joining material comprising at least an oxynitride glass.
An assembly for a high pressure discharge lamp comprising:
- a ceramic discharge vessel with an inner space formed therein and end portions, an ionizable light-emitting material and a starter gas being to be contained in said inner space, and an opening being formed in said end portion;
- an electrode system provided in said inner space,
- a metal member, and
- a joining material for joining said metal member and said sealing member, said joining material comprising at least an oxynitride glass.
A method of producing a joined body of a first and second members comprising a joining material between said first and second members, said joining material containing an oxynitride glass:
- said method comprising the step of subjecting raw material for said oxynitride glass to a heat treatment under atmosphere of hydrogen and nitrogen at a volume ratio of 25:75 to 50:60 to generate said oxynitride glass.
Dependencies are inferred from the claim text.