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Development of carbon nanotube based protective coatings for anodes in electron tube devices

Objective

Electron tubes magnetrons travelling wave tubes triodes etc are vacuum operating devices that are widely used as radio-frequency oscillators and amplifiers. They have a huge number of applications in industrial systems such as microwave ovens or drier s and telecommunications radars etc. The performance of electron tubes depends on several design aspects.

One fundamental limitation of high power electron tubes is the fact that the anode of these devices must withstand enormous electron densities which result in the production of secondary electrons inside the tube and consequent related to out-gassing instability efficiency losses and reduction of device lifetime. The present project aims at developing a thin film coating technology based on carbon nanotubes CNTs able to produce protective coatings for the electron tube anodes. From the electrical point of view these carbon based structures have extremely interesting properties that make them ideal for being used as protective coatings in electron tube anodes extremely high conductivity capacity to sink huge current densities without been degraded and capability to capture secondary electrons due to the electric field generated at their tip.

Throughout the project it will be built up a vacuum reactor for producing CNTS. CNTs will be growth under different conditions and the material characterised by different spectroscopic techniques atomic force microscopy and electron microscopy in order to establish the relationship between the growth conditions and the physical properties of the coatings. Real devices will be produced which will include CNT coated anodes and their performance will be tested and compared with standard devices.

Call for proposal

FP6-2004-SME-COOP
See other projects for this call

Coordinator

CENTRE DE RECERCA I INVESTIGACIO DE CATALUNYA S A
Address
C/margallo 12
Barcelona
Spain

Participants (9)

COVIMAG
France
Address
Avenue Du 4 Juillet 1776, Z I La Marquisie B.p.25
Brive La Gaillarde
DIPL.-ING. RAINER ZWOSTA, INGENIEURBUERO
Germany
Address
Lilienweg 7
Dornstadt
FELTALALOI ES KUTATO KOZPONT SZOLGALTATO KFT
Hungary
Address
Szalonka Koz 28
Budapest
FRICKE UND MALLAH MICROWAVE TECHNOLOGY GMBH
Germany
Address
Werner Nordmeyer Str 25
Peine
INNOWACJA POLSKA SP Z.O.O.
Poland
Address
Lublanska 34
Krakow
SAIREM SOCIETE POUR L'APPLICATION INDUSTRIELLE DE LA RESERCHE EN ELECTRONIQUE ET MICROONDES
France
Address
12, Porte Du Grand Lyon-neyron
Miribel
TEER COATINGS LIMITED
United Kingdom
Address
West Stone House (Berry Hill Industrial Estate )
Droitwitch (Worcestershire)
TTI NORTE S.L.
Spain
Address
Avenida De Las Castros, 1
Santander
UNIVERSITAT DE BARCELONA
Spain
Address
Gran Via De Les Corts Catalanes 585 (Vicerectorat De Politica Internacional)
Barcelona