Application of Alkaline-Earth-Metal and Rare-Earth-Element Complexing Oxide Powders for the Screen-printed Protective Layer of AC-PDP

Abstract

An investigation of the application of alkaline-earth-metal and rare-earth-element complexing oxide powders for the screen-printed protective layer of AC-PDPs is reported. The materials show higher luminous efficiency than conventional MgO. The role of the rare-earth-elements is significant and powders containing La showed the highest luminous efficiency, followed in order by those containing Y and Gd. The alkaline-earth-metals little effect. Protective layers containing BaLa₂O₄ powders showed the lowest discharge voltage. Addition of a binder, a precursor of complexing oxide and modification by heat treatment, lowers the sustaining voltage and raises the luminous efficiency. It is concluded that the complexing oxide powders show high potential as the screen-printed protective layer and finer powder is necessary for improving the discharge characteristics and ensuring long-time operation.