Influence of BaO/(SrO+BaO) on melt properties in R_2O-RO-SiO_2 glasses for plasma display panel substrates

摘要

The influence of the BaO/(SrO+BaO) ratio on the viscosity, liquidus temperature and electrical resistivity of melts was studied in R_2O-RO-SiO_2 glasses for a plasma display panel (PDP) substrate. SrO was substituted progressively by BaO at fixed concentrations of alkaline earth oxides. The dependence of the viscosity and liquidus temperature on BaO/(SrO+BaO) showed a continuous decrease. However, the compositional dependence of resistivity showed minima that may be a kind of mixed mobile ion effect. Comparison of these results with those of previous work suggests that a full replacement of SrO by BaO is desirable from the viewpoint of raw material cost and practical glass production.