Rare earth hexaboride electron-emitting material

Details Rare earth hexaboride electron-emitting material Rare earth hexaboride electron-emitting material

1996-09-03

1998-11-17

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

Metal compound containing

2525211, 2525214, 423289, 429218, H01B 106

Patent

active

058371656

ABSTRACT:
A rare earth hexaboride electron-emitting material of the formula ReB.sub.6+x, wherein Re is La, Ce or (La+Ce) and 0.05.ltoreq.x.ltoreq.0.20.

REFERENCES:
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patent: 4999176 (1991-03-01), Iltis et al.
patent: 5238527 (1993-08-01), Otani et al.
patent: 5336362 (1994-08-01), Tanaka et al.
Davis et al. "Comparison of thermionic cathode parameters of low index single crystal duces . . . " Appl. Surf. Sci., 37(4) 1989 pp. 381-394 (Abstract Only).
Surface Science 107, L.W. Swanson, et al, "Crystallographic Dependence of the Work Function and volatility of LaB.sub.6 ", pp. 263-289, 1981 (no month).
Journal of Physics E:Scientific Instruments 1975 Vol. 8, E.D.Gibson et al, "The preparation of single crystal LaB.sub.6 cathodes for electron microscopes", pp. 1003-1004. no month.
The Journal of Physical Chemistry, vol. 82, No. 1, 1978, Edmund Storms, et al "Phase Relationship, Vaporization, and Thermodynamic Properties of the Lanthanum-Boron System", pp. 51-59. no month.
Journal of Crystal Growth 118 (1992), Shigeki Otani, et al "Preparation of LaB.sub.6 single crystals by the traveling solvent floating zone method", pp. 461-463. no month.
Journal of Crystal Growth 126 (1993), Shigeki Otani, et al "Preparation of LaB.sub.6 single crystals from a boron-rich molten zone by the floating method", pp. 466-470. no month.
Journal of Materials Science 21 (1986), Paul R. Davis, et al "Fabrication and characterization of rare earth heaboride single-crystal materials", pp. 825-836. no month.
Prog. Crystal Growth and Charact. 1988, vol. 16, pp. 1-18, Takaho Tanaka et al "A Survey on the Floating Zone Crystal Growth of the Monocarbides of Iva, Va and Vla Transition Metals". no month.

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