Title:
ULTRAVIOLET LIGHT ABSORBING GLASS
Document Type and Number:
Japanese Patent JPH0656467
Kind Code:
A
Abstract:
PURPOSE: To obtain an ultraviolet light absorbing glass being colorless and transparent because of high light transmittance in a visible range, capable of efficiently absorbing ultraviolet rays of ≤320nm wavelength harmful to human body.
CONSTITUTION: Ultraviolet light absorbing glass has a composition comprising 65-80wt.% SiO2, 5-20wt.% B2O3, 2-8wt.% Al2O3, 1-5wt.% RO (RO is one or more selected from MgO, CaO, BaO, SrO and ZrO), 4-8wt.% R20 (R20 is one or more selected from Na2O, K2O and Li2O), 0.3-4wt.% CeO2, 0.01-0.2wt.% Fe2O3, 0.0005-<0.005 V2O5 and 0-2wt.% TiO2.
Inventors:
YOSHIKAWA KOICHIRO
WAKAGI JUNZO
WAKAGI JUNZO
Application Number:
JP23297292A
Publication Date:
March 01, 1994
Filing Date:
August 07, 1992
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO
International Classes:
C03C3/093; C03C3/095; C03C4/08; (IPC1-7): C03C4/08; C03C3/093
Next Patent: LASER GLASS