Title:
ULTRAVIOLET-ABSORBING GLASS TUBE FOR FLUORESCENT LAMP AND GLASS TUBE COMPRISING THE SAME FOR FLUORESCENT LAMP
Document Type and Number:
WIPO Patent Application WO/2008/029518
Kind Code:
A1
Abstract:
An ultraviolet-absorbing glass for fluorescent lamps which comprises a borosilicate glass comprising, in terms of mass%, 60-80% SiO2, 1-7% Al2O3, 10-25% B2O3, 3-15% Li2O+Na2O+K2O, 0-5% CaO+MgO+BaO+SrO+ZnO, 0.1-5% CeO2, 0.005-0.1% Fe2O3, 0.01-5% SnO+SnO2, and 0.1-10% ZrO2+ZnO. The proportion of Ce4+ ions to all Ce ions in the borosilicate glass is 10% or lower, and the glass has an average coefficient of linear expansion in a 0-300°C range defined in JIS R3102 of 36-57×10-7 /°C.
Inventors:
SHIRATORI, Makoto (SHIZUOKA PLANT 3583-5, Kawashiri, Yoshida-ch, Haibara-gun Shizuoka 02, 4210302, JP)
Application Number:
JP2007/051582
Publication Date:
March 13, 2008
Filing Date:
January 31, 2007
Export Citation:
Assignee:
ASAHI TECHNO GLASS CORPORATION (1-50-1, Gyoda Funabashi-shi Chiba, 44, 2730044, JP)
旭テクノグラス株式会社 (〒44 千葉県船橋市行田一丁目５０番１号 Chiba, 2730044, JP)
旭テクノグラス株式会社 (〒44 千葉県船橋市行田一丁目５０番１号 Chiba, 2730044, JP)
International Classes:
C03C3/093; C03C3/076
Attorney, Agent or Firm:
SUYAMA, Saichi (Kanda Higashiyama Bldg, 1 Kandata-cho 2-chom, Chiyoda-ku Tokyo 46, 1010046, JP)
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