GLASS COMPOSITIONS USED IN PLASMA DISPLAYS

摘要

A composition suitable for producing a plasma display panel glass having a density of less than 2.70 g/cm<3> and a viscosity at its liquidus temperature of at least 3000 poise, the composition comprising, in weight % on the basis of the oxide: SiO2 56 % to 72 %; R2O 8 % to 14 %; R'O 10 % to 17 %; Al2O3 5 % to 11 %; B2O3 0 % to 5 %; ZrO2 0 % to 7 %; TiO2 0 % to 2 %; P2O5 0 % to 3 %; where R represents a Group I (alkali metal) oxide and R' represents a Group II (alkaline earth metal) oxide, the amount of K2O included in the R2O being less than 4 %, the total amount of the SiO2, Al2O3 and ZrO2 being greater than 71 %, the total amount of BaO and SrO, if present, included in the R'O being a maximum of 8 %.