Arc tube composed of yttrium aluminum garnet ceramic material

Details Arc tube composed of yttrium aluminum garnet ceramic material Arc tube composed of yttrium aluminum garnet ceramic material

2011-02-08

2011-02-08

Ton, Toan (Department: 2889)

Electric lamp and discharge devices

With gas or vapor

Envelope composition

C313S493000, C501S152000, C501S153000

Reexamination Certificate

active

07884550

ABSTRACT:
A transparent sintered yttrium aluminum garnet ceramic material formed from a solid-state reaction of a mixture of yttrium oxide powder and aluminum oxide powder during sintering. The ceramic material preferably has an in-line transmission of greater than 75% so it may used to fabricate arc tubes for high intensity discharge lamps used in automotive headlamps.

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Akio Ikesue et al,Fabrication of Polycrystalline, Transparent YAG Ceramics by a Solid-State Reaction Method, J. Am. Ceram. Soc., 78[1] 225-28 (1995).

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