La_(0.5)Sr_(0.5)CoO_3放電カソード材料の初期放電での放電電圧変化

摘要

The La_(0.5)Sr_(0.5)CoO_3 was used as a cathode for the first time when the plasma display panel was used on the handheld personal computer. It has favorable sputtering resistance characteristic and stable discharge characteristic in gases. A cathode made from the La_(0.5)Sr_(0.5)CoO_3 has unique electrical characteristic in early phase discharge voltage characteristics. The discharge voltage continues to decrease from the starting value.rnIn this report, the discharge voltage shift of the La_(0.5)Sr_(0.5)CoO_3 was investigated through an analysis of the DC plasma panel which was made as prototype. It is presumed that the discharge voltage shift is caused by the current density shift of the cathode surface, and that the current density shift is caused by the surface profile of the cathode particles. In order to find out this mechanism, the spherical form model was applied to the discharge voltage shift, and the calculated values and the measured values were compared. The calculated values correspond approximately to measured values. This spherical form model is considered of available for the discharge voltage shift.%気体放電を使用した表示装置であるプラズマディスプレrnイ（PDP：Plasma Display Panel）は小型軽量で薄〈，しかrnも表示品位に優れた表示装置であったため，ブラウン管以rn外のコンピュータ表示装置として，小型コンピュータに初rnめて使用された。初期のコンピュータ表示用のプラズマデrnィスプレイはネオンガスを主成分とする直流型モノクロプrnラズマディスプレイであった。