Thermal field electron emission from Ir-La alloy and LaB/sub 6

Autor:	N.N. Chubun, L.I. Utkalova, B.C. Djubua
Rok vydání:	2002
Předmět:	Materials science business.industry Alloy Analytical chemistry chemistry.chemical_element Thermionic emission engineering.material Cathode Hafnium law.invention Carbide Field electron emission Electrical discharge machining chemistry law engineering Optoelectronics business Common emitter
Zdroj:	IVMC '95. Eighth International Vacuum Microelectronics Conference. Technical Digest (Cat. No.TH8012).
DOI:	10.1109/ivmc.1995.487080
Popis:	This paper presents results of further investigation of Ir-La metal alloy cathode under conditions of transition from thermionic emission to thermal field electron emission. The cathodes of a cone shape with taper angle about 60/spl deg/ were made by spark discharge machining of Ir-La and LaB/sub 6/ ingots. To suppress the emission the whole surface of the cathode was covered with layers of hafnium and carbon. Subsequent heating resulted in appearance of hafnium carbide layer about 6 /spl mu/m thick. Then the tip of the cone was ground so as to have the diameter of the open emitter surface to be about 100 /spl mu/m.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e9d75a6511dbda5d115dbee065b0e012 https://doi.org/10.1109/ivmc.1995.487080 Zobrazit plný text záznamu