SILVA, D.L.C. eSILVA, A.C.RAMBO, C.R.CASTANHO, S.2020-01-132020-01-13SILVA, D.L.C. e; SILVA, A.C.; RAMBO, C.R.; CASTANHO, S. Niobium modified glass for nuclear waste immobilization. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. <b>Proceedings...</b> Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 2609-2614. Disponível em: http://repositorio.ipen.br/handle/123456789/30646.http://repositorio.ipen.br/handle/123456789/30646The impact of Nb2O5 addition to glasses belonging to the system SiO2-Na2O-CaO-B2O5-Al2O3 were investigated for nuclear waste immobilization applications. The glass samples, produced by the traditional melting method, were characterized by XRD, Differential Thermal Analysis (DTA) and Fourier-Transform Infrared Spectroscopy (FT-IR). The XRD results confirmed the amorphous state of the glasses and the thermal and FT-IR analyses revealed that Nb2O5 was dispersedly incorporated to the glass structure and that higher contents of the oxide result in a niobate network growth. The glasses showed good resistance to devitrification and are applicable for nuclear waste vitrification processes. These results show that the process is a promising alternative to produce a new family of glasses with optimized thermal resistance for the immobilization of nuclear wastes.2609-2614openAccessdifferential thermal analysisfourier transformationglassinfrared spectraniobium oxidesradioactive wastesvitrificationx-ray diffractionTexto completo de eventohttps://orcid.org/0000-0002-0155-9100