Accession Number:

AD0271101

Title:

STUDIES OF ELECTRON TUBE MATERIALS AND THERMIONIC EMISSION PROCESSES

Descriptive Note:

Corporate Author:

GENERAL TELEPHONE AND ELECTRONICS LABS INC BAYSIDE N Y

Personal Author(s):

Report Date:

1961-12-29

Pagination or Media Count:

1.0

Abstract:

The thermionic emission properties of ultra-pure Ni based oxide cathodes in the clean test diode were investigated. The effects of the following processing, activation and life conditions on thermionic emission were evaluated 1 improvement in the cleanliness of the diode system by pre-processing the bulb, stem and supporting elements prior to final assembly of the test diode 2 dependence of the electrolytic activation process on cathode temperature, anode voltage and anode current 3 operation of the test diodes during life both with and without anode voltage. The method which was developed for measuring the evaporation of active material from dispenser cathodes was extended to the more difficult problem of measuring sublimation of active material from oxide cathodes. Preliminary results on the evaporation of Ba andor BaO were obtained for the following passive and active metal base oxide systems BaO on Pt BaO on ultra-pure Ni rod BaO on active N4 Ni BaO on Ta C-10 triple oxide coating on ultra-pure Ni C-10 on N4 Ni. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE