Applications of Scandium Oxide in Dispenser Thermionic Cathodes

Jinshu Wang
Beijing University of Technology, Beijing, China

Series: Chemistry Research and Applications
BISAC: SCI013000

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Volume 10

Issue 1

Volume 2

Volume 3

Special issue: Resilience in breaking the cycle of children’s environmental health disparities
Edited by I Leslie Rubin, Robert J Geller, Abby Mutic, Benjamin A Gitterman, Nathan Mutic, Wayne Garfinkel, Claire D Coles, Kurt Martinuzzi, and Joav Merrick

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The addition of scandium oxide to dispenser cathodes, which are typically comprised of a porous tungsten matrix impregnated with Ba-Ca-aluminates, improves the emission by a factor of tens to hundreds under the same operating temperature. This new book reviews the fabrication, emission property and emission mechanism of Scandate cathodes. The traditional impregnated Scandate cathode, “top-layer” impregnated Scandate cathode, impregnated mixed matrix Scandate cathode and pressed Scandate cathode were each summarized. It was found that decreasing the grain size from micrometer to sub-micrometer could enhance the cathode emission performance. (Imprint: Nova)

ABSTRACT

1. INTRODUCTION

2. THE TYPE OF SCANDATE CATHODE

3. CHARACTERIZATION OF SCANDIUM AND ITS ROLE IN THE EMISSION

4. SURFACE STRUCTURE OF SCANDATE CATHODES

5. SUMMARY

ACKNOWLEDGEMENT

REFERENCES

INDEX

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