絶縁物添加によるＬａ０．５Ｓｒ０．５ＣｏＯ３放電陰極材料の放電収縮抑制

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  • The Suppression of Discharge Area Shrinkage of the La0.5Sr0.5CoO3 Cathode by Use of Insulator
  • ゼツエンブツ テンカ ニ ヨル La0 5Sr0 5CoO3 ホウデン インキョク ザイリョウ ノ ホウデン シュウシュク ヨクセイ

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The La0.5Sr0.5CoO3 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 La0.5Sr0.5CoO3 has unique electrical characteristic in period of continual discharge. The discharge voltage and luminance of the La0.5Sr0.5CoO3 shift during an extended period of discharge, and the discharge voltage continue to increase in later period of continual discharge. It is presumed that the discharge voltage and luminance shift is caused by the discharge and luminescence area shift of the cathode surface, and that the current density shift is caused by the discharge area shrinkage phenomenon.<br>This discharge area shrinkage phenomenon is reduced by use of a mixture of La0.5Sr0.5CoO3 and insulator, and the sputter rate is reduced, too. In this report, the discharge and luminescence area shift of the La0.5Sr0.5CoO3 are investigated through an analysis of the DC plasma panel that is made as prototype, and the discharge characteristic of the La0.5Sr0.5CoO3 cathode is compared with the cathode that is made from a mixture of La0.5Sr0.5CoO3 and insulator.

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