| 简介 |
PROBLEM TO BE SOLVED : To provide a glass tube used for a fluorescent lamp for a liquid crystal display device which has excellent characteristics in terms of preventing solarization, the properties for shielding ultraviolet rays, and the physical and thermal strength.
SOLUTION : The glass contains 55.0-75.0% SiO2; 10.0-25.0% B2O3; 1.0-10.0% Al2O3; 0-3.8% Na2O; 0-3.0% Li2O; 3.0-10.0% K2O; 3.2-16.0% Na2O+Li2O+K2O; 0.5-8% TiO2; 0.1-5% CeO2; 0.6-8.1% TiO2+CeO2; 0.001-0.05% Fe2O3; 0-0.7% Sb2O3; 0.1-3.0% SnO2; and 0.5-10.0% at least one of a rare earth element selected from the group consisting of Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu by weight, and is characterized in that the coefficient of linear expansion in a temperature range of 30-380°C is 34-58×10-7/°C.
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