Ultraviolet absorbing glass, glass tube for fluorescent lamp...

Details Ultraviolet absorbing glass, glass tube for fluorescent lamp... Ultraviolet absorbing glass, glass tube for fluorescent lamp...

2006-03-16

2010-02-23

Nelms, David (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

Reexamination Certificate

active

07667791

ABSTRACT:
Disclosed is an ultraviolet absorbing glass for fluorescent lamps which is composed of a borosilicate glass containing, in mass %, 60 to 80% of SiO2, 1 to 7% of Al2O3, 10 to 25% of B2O3, 3 to 15% of Li2O+Na2O+K2O, 0 to 5% of CaO+MgO+BaO+SrO+ZnO, 0.001 to 0.05% of Fe2O3, 0.1 to 5% of CeO2, 0.01 to 5% of SnO+SnO2and 0.01 to 5% of ZrO2+ZnO+Nb2O5, and having an average linear expansion coefficient in a range of 36 to 57×10−7/° C. at 0 to 300° C. defined in JIS R 3102.

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