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Scandia-doped tungsten bodies for Sc-type cathodes by Jinshu Wang; Yiman Wang; Siwu Tao; Hongyi Li; Jiancan Yang; Meiling Zhou is a Materials Science article available to read on EtoBox.

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We systematically investigated scandium oxide-doped (and with small amount of rhenium-doped) tungsten bodies for Scandate-type cathodes. Homogeneous microstructure and uniform distribution of scandia were found in these bodies. Submicron granular porous bodies with greatly uniformly dispersed scandia are obtained by sintering Sc 2 O 3 and Re doped tungsten powder. Such bodies are thought to be beneficial for emission uniformity. For Scandate-type cathodes with such bodies, a slight decrease of scandia was observed by ''in situ'' AES analysis after ion sputtering, but it recovers completely on reheating. It is assumed that film-like Sc 2 O 3 coating over tungsten grains but leaving porous areas for diffusion of barium to the surface leads to good emission properties and high resistance to ion bombardment. Reprocucibility has been proved for the body manufactering process. This offers the possibility of improving the performance of these cathodes in applications such as CRT's.

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Author

Jinshu Wang; Yiman Wang; Siwu Tao; Hongyi Li; Jiancan Yang; Meiling Zhou

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0169-4332)

Published

2003

Language

EN

Field

Materials Science (Physical Sciences)