Discharge lamp having a yttrium aluminum garnet discharge envelo

Details Discharge lamp having a yttrium aluminum garnet discharge envelo Discharge lamp having a yttrium aluminum garnet discharge envelo

1984-04-11

1989-06-20

Schor, Kenneth M.

Electric lamp and discharge devices

With gas or vapor

Envelope composition

501152, H01J 1716, H01J 6130

Patent

active

048411957

ABSTRACT:
The invention relates to a high-pressure discharage lamp comprising a discharge envelope having a wall of ceramic translucent material consisting mainly of densely sintered polycrystalline yttrium aluminium garnet (YAG). According to the invention, the material of the wall of the discharge envelope contains a single phase of YAG and at least one of the substances MgO and SiO.sub.2 in at total quantity of at least 50 ppm by weight, the absolute value of the difference between the SiO.sub.2 and MgO contents being at least 50 ppm by weight, and an excess of MgO at most 1000 ppm by weight. It has been found that the material can be sintered without external pressure, and a lamp according to the invention can then be obtained comprising a discharge envelope having a satisfactory transluecence and a high resistance to attacks of filling constituents.

REFERENCES:
patent: 3767745 (1973-10-01), Gazza et al.
patent: 4174973 (1979-11-01), Rhodes et al.
patent: 4182972 (1980-01-01), Kaneno et al.
patent: 4331627 (1982-05-01), Yamamoto et al.
patent: 4373030 (1983-02-01), Kaneno et al.
Donoghue, "A Guide to Man-Made Gem Stones", pp. 163-165, 1982.
Phase Diagrams for Ceramists, 1969, Supplement FIGS. 2344, 2586.

Affiliated with

Also associated with

Rating

Discharge lamp having a yttrium aluminum garnet discharge envelo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Discharge lamp having a yttrium aluminum garnet discharge envelo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discharge lamp having a yttrium aluminum garnet discharge envelo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-527230