National Institute of Advanced Industrial Science and Technology

Junko Abe

Tomoko Akai

Masaru Yamashita

Ryousuke Sawa

Tomoko Atagi

Masanobu Itou

A glass composition for lamps includes the following by weight percent: SiO: 60-75 wt %; CeO+CeO: 0.01-5.2 wt %; SnO+SnO: 0.01-5.2 wt %; AlO: 0.5-6 wt %; BO: 0-5 wt %; LiO+NaO+KO: 13-20 wt %; MgO: 0.5-5 wt %; CaO: 1-10 wt %; SrO: 0-10 wt %; BaO: 0-10 wt %; ZnO: 0-10 wt %; FeO+FeO: 0-0.2 wt %; and TiO: 0-1 wt %. The glass composition for lamps that contains no lead or antimony achieves high ultraviolet screening capacity, ensuring fewer occurrences of initial coloring and ultraviolet ray caused coloring of glass.

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Osaka, Japan

Junko Abe