| 摘要 |
PURPOSE:To obtain the title panel capable of suppressing coloration due to electron beam irradiation by replacing part of the Na<+> on the surface layer to be subjected to electron beam irradiation of a glass panel made up of each specified amount of inorganic oxides with K<+> by ion exchange treatment using a K-contg. molten salt. CONSTITUTION:The objective glass panel obtained by thermoforming of a raw glass panel with a composition given in the table, and having the following characteristics: part of the Na<+> on the surface layer to be subjected to electron beam irradiation of said glass panel has been replaced with K<+> using an ion exchange resin in a K-contg. molten salt, and the molar ratio for the Na<+> and K<+> on said surface layer is specified as 0.3-0.75 in terms of Na2O/(Na2O+K2O). The present glass panel is used in image displays to be irradiated with electron beams, esp. being favorably used for cathode ray tubes to irradiate glass with high-energy electron beams. |
