The production of targets for the generation of Radioactive Ion Beams (RIB) characterized by high power resistance, fast diffusion release, high permeability and high ionization yield is a topic of great interest and the research on this field is currently very lively. In this work, the synthetic route where carburization of a suitable precursor compound of lanthanum is obtained by mixing the compound with a proper amount of graphite and a binder, followed by thermal treatment has been chosen. In order to increase the porosity of the final material a novel technique, which makes use of lanthanum oxalate as starting precursor, has been tested. A series of pellets with diameter of 13 mm and thickness of 1 mm were obtained by mixing lanthanum oxide and graphite in a mortar and the cohesion of the powders was assured by the addition of a phenolic binder. Thermal treatments on the pellets were performed in Lindberg furnace, equipped with an alumina tube, and in Astro furnace, equipped, with a graphite chamber. In a first run, a thermal treatment has been performed on a pellet based on lanthanum oxide and graphite previously decarbonated and dehydrated in a muffle furnace at 800 ◦ C. The sample was thereafter heated in vacuum up to 1500 ◦C and in argon atmosphere until 1800◦C. The success of the carburization process was confirmed by the appearance of the pellet after the treatments

Thermal treatments and characterizations of pellets for SPES direct target

TONEZZER, Michele;
2007

Abstract

The production of targets for the generation of Radioactive Ion Beams (RIB) characterized by high power resistance, fast diffusion release, high permeability and high ionization yield is a topic of great interest and the research on this field is currently very lively. In this work, the synthetic route where carburization of a suitable precursor compound of lanthanum is obtained by mixing the compound with a proper amount of graphite and a binder, followed by thermal treatment has been chosen. In order to increase the porosity of the final material a novel technique, which makes use of lanthanum oxalate as starting precursor, has been tested. A series of pellets with diameter of 13 mm and thickness of 1 mm were obtained by mixing lanthanum oxide and graphite in a mortar and the cohesion of the powders was assured by the addition of a phenolic binder. Thermal treatments on the pellets were performed in Lindberg furnace, equipped with an alumina tube, and in Astro furnace, equipped, with a graphite chamber. In a first run, a thermal treatment has been performed on a pellet based on lanthanum oxide and graphite previously decarbonated and dehydrated in a muffle furnace at 800 ◦ C. The sample was thereafter heated in vacuum up to 1500 ◦C and in argon atmosphere until 1800◦C. The success of the carburization process was confirmed by the appearance of the pellet after the treatments
2007
Tonezzer, Michele; Carturan, S.; Piga, L.; Colombo, P.; Di Bernardo, P.; Zanonato, P.; Andrighetto, A.; Antonucci, C.; Barbui, M.; Cervellera, F.; Cevolani, S.; Cinausero, M.; Dainelli, A.; Gramegna, F.; Maggioni, G.; Meneghetti, G.; Petrovich, C.; Prete, G.; Rizzi, V.; Zafiropoulos, D.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2341403
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact