High−field electron emission from oxide−metal composite materials

High−field electron emission from unidirectionally solidified oxide−metal composites has been experimentally evaluated. Multipin arrays with pin diameters of 0.2−1.0 μm and pin densities of (5−50) ×106/cm2 were produced in UO2−W, ZrO2−W, and Gd2O3−Mo systems. Macroscopic current densities in excess...

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Veröffentlicht in:	J. Appl. Phys., v. 46, no. 4, pp. 1841-1843 v. 46, no. 4, pp. 1841-1843, 1975-04, Vol.46 (4), p.1841-1843
Hauptverfasser:	Feeney, R. K., Chapman, A. T., Keener, B. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	CATHODES GADOLINIUM OXIDES- MOLYBDENUM COMPOSITE MATERIALS- FIELD EMISSION N50130 -Metals, Ceramics, & Other Materials-Ceramics & Cermets-Properties, Structure & Phase Studies TUNGSTEN- URANIUM OXIDES TUNGSTEN- ZIRCONIUM OXIDES
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Zusammenfassung:	High−field electron emission from unidirectionally solidified oxide−metal composites has been experimentally evaluated. Multipin arrays with pin diameters of 0.2−1.0 μm and pin densities of (5−50) ×106/cm2 were produced in UO2−W, ZrO2−W, and Gd2O3−Mo systems. Macroscopic current densities in excess of 100 mA/cm2 were routinely obtained and the observed emitter lifetime was in excess of 2000 h.
ISSN:	0021-8979 1089-7550
DOI:	10.1063/1.321754