High total transmittance alumina discharge vessels having...

Details High total transmittance alumina discharge vessels having... High total transmittance alumina discharge vessels having...

H - Electricity

01

J

H01J 61/30 (2006.01) H01J 5/04 (2006.01) H01J 9/24 (2006.01)

Patent

CA 2531635

The present invention uses a post-sinter-HIP anneal to increase the total transmittance of ceramic discharge vessels comprised of a submicron-grained alumina doped with MgO. After the anneal, the submicron-grained alumina discharge vessels have high values of both total and in-line transmittance, and are thus suitable for use in focused- beam, short-arc lamps. In particular, the total transmittance of the discharge vessel is increased to greater than 92% in the wavelength range from about 400 nm to about 700 nm.

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