High-intensity discharge lamp with Mo-SiO2 functionally graded material

Ayumu Umemoto, Koichi Hayashi, Kunihiko Nakashima, Noritaka Saito, Kenji Kaneko, Keisaku Ogi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We show the invention of the new type of hermetically sealed high-intensity discharge lamps, made of Mo-SiO2 functionally graded material (FGM) as an electrode and a sealing component. In the case of high-intensity discharge lamps with Mo-SiO2 FGM (FGM lamp), the thermal expansion coefficient between Mo and SiO2 is functionally graded so that it tolerates a large number of heating cycles, with no cooling system required. Furthermore, lamps survive without breakage. The W electrode is totally separated from the lamp envelope by the FGM, so that no leakage of the luminous elements or gases takes place, when a large gas pressure exists inside a lamp.

Original languageEnglish
Pages (from-to)1133-1135
Number of pages3
JournalJournal of the American Ceramic Society
Volume89
Issue number3
DOIs
Publication statusPublished - Mar 1 2006

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Discharge lamps
Functionally graded materials
Electric lamps
Gases
Electrodes
Leakage (fluid)
electrode
Patents and inventions
Cooling systems
Thermal expansion
thermal expansion
breakage
sealing
Heating
gas
leakage
lamp
material
heating
cooling

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

High-intensity discharge lamp with Mo-SiO2 functionally graded material. / Umemoto, Ayumu; Hayashi, Koichi; Nakashima, Kunihiko; Saito, Noritaka; Kaneko, Kenji; Ogi, Keisaku.

In: Journal of the American Ceramic Society, Vol. 89, No. 3, 01.03.2006, p. 1133-1135.

Research output: Contribution to journalArticle

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