Work function of sintered lanthanum hexaboride
- 15 February 1979
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 34 (4), 249-251
- https://doi.org/10.1063/1.90769
Abstract
A work function of 2.36 eV and a Richardson constant of 120 A/cm2 K2 have been measured for a hot‐pressed porous lanthanum hexaboride rod cathode. It is shown that the LaB6work function is highly susceptible to poisoning by molybdenum deposited at high temperatures during experiments. A stable work function of about 2.7 eV is then measured. After removal of the molybdenum by atomic iodine flux, the work function of clean LaB6 is restored.Keywords
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