Effect of Calcium Content on the Discharge Characteristics of Ca x La1 − x CrO3 Thick‐Film Cathodes for Use in DC‐Type Plasma Display Panels

The effects of calcium content on the discharge characteristics of calcium lanthanum chromite (Ca x La 1-x CrO 3 ) thick-film cathodes were investigated for dc-type plasma display panels. To produce fine-grained powder, a calcium content of less than 0.4 is recommended. Powders with a calcium content of less than 0.2 showed perovskite single structures, while those with x>0.4 produced a two-phase structure that contained grains with different calcium ratios. Both the minimum breakdown voltage and the minimum sustain voltage were constant values independent of the calcium content. Changes in the current-induced voltage due to variations in the resistivity of the powder were small