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- W1987478617 abstract "A scandium, barium, and oxygen coverage of monolayer order is essential to the high-emission capability of scandate cathodes. The relationship between surface coverage and emission is demonstrated by combined scanning Auger and emission measurements. A problem with the known cathodes is that the emission recovery after ion bombardment, as may occur during CRT processing, is not yet complete. The problem cannot be solved by simply constructing a mixed-matrix cathode of W and Sc grains because of huge evaporation of Sc during sintering and oxidation of the remainder during subsequent impregnation. How the scandium can be effectively surrounded by a protective layer resulting in considerably improved scandium supply, is discussed. Moreover, experimental results indicate the possibility for further simplification of the cathode manufacture. The latter is shown with the aid of cathodes containing compounds which exhibit Sc surface segregation on heating.< <ETX xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>></ETX>" @default.
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- W1987478617 date "1990-12-01" @default.
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- W1987478617 title "Scandium supply after ion bombardment on scandate cathodes" @default.
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- W1987478617 doi "https://doi.org/10.1109/16.64538" @default.
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