Work function of sintered lanthanum hexaboride

Journal Article · Wed Feb 14 23:00:00 EST 1979 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.90769· OSTI ID:6404360

Pelletier, J; Pomot, C

A work function of 2.36 eV and a Richardson constant of 120 A/cm/sup 2/ K/sup 2/ have been measured for a hot-pressed porous lanthanum hexaboride rod cathode. It is shown that the LaB/sub 6/ work 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 LaB/sub 6/ is restored.

• Research Organization: Laboratoire de Physique des Plasmas, Equipe de Recherche Associee au CNRS, Universite Scientifique et Medicale Grenoble I, BP 53 X, 38041 Grenoble Cedex, France
• OSTI ID: 6404360
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 34:4; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BORIDES
BORON COMPOUNDS
CATHODES
DATA
ELECTRODES
ELEMENTS
EQUATIONS
HALOGENS
INFORMATION
IODINE
LANTHANUM BORIDES
LANTHANUM COMPOUNDS
NONMETALS
POISONING
RARE EARTH COMPOUNDS
RICHARDSON EQUATION
SINTERED MATERIALS
VERY HIGH TEMPERATURE
WORK FUNCTIONS