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日立公司研制成一种适用于超精细彩色显示和高清晰度电视的钪合金阴极.该阴极使用的材料可获得10A/cm~2的高密度电流和850～900℃的工作温度,这个温度比稀有金属薄膜阴极的记录低100～150℃.由于该阴极耐用性较高,其亮度比通常使用的氧化物阴极提高了一倍.虽然高清晰度显示器需要10A/cm~2电流密度才能获得充分的亮度,但用氧化物的普通阴极,由于其耐热极限性,只能承受5A/cm~2的最大电流密度.新研制的阴极是通过蒸发含有2.5～
Hitachi has developed a scandium alloy cathode suitable for ultra-fine color displays and high-definition televisions, which uses materials with high current densities of 10 A / cm 2 and operating temperatures of 850-900 ° C, The recording of the metal thin film cathode is as low as 100 to 150 ° C. Due to the higher durability of the cathode, the brightness of the cathode is doubled than that of a commonly used oxide cathode.Although a high current display requires a current density of 10 A / cm 2 to obtain a sufficient Brightness, but with ordinary oxide cathode, due to its heat resistance limit, can only withstand the maximum current density 5A / cm ~ 2. The newly developed cathode is by evaporation containing 2.5 ~