Structural and thermal influence of niobia in aluminoborosilicate glasses
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2022
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Ceramics International
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The addition of small amounts of niobia (Nb2O5) in borosilicate glasses was explored. By analysis on thermal and
structural changes, we found evidences that niobium integrates the glass structure in octahedral NbO6 coordination.
Adding up to 8.0 mol% of Nb2O5, the oxide partially ruptured the glass structure, interfering in the BO3/
BO4 ratio, but the predominant network configuration was maintained. Thermally, there was an increase in the
processing interval and the glasses became more resistant against crystallization, with the presence of niobia.
Also, the oxide contributed to a notable decrease in the viscosity of the melts. The improvement of such properties
were obtained by the controlled dispersion of the oxide in the glass network structure, avoiding large areas
of phase-to-phase separation to preserve the desired ability of these glasses to incorporate a wide range of
elements.
Como referenciar
COSTA-SILVA, D.L.; BARTOLOME, J.F.; SILVA, A.C.; MELLO-CASTANHO, S. Structural and thermal influence of niobia in aluminoborosilicate glasses. Ceramics International, v. 48, n. 13, p. 18433-18440, 2022. DOI: 10.1016/j.ceramint.2022.03.112. Disponível em: http://repositorio.ipen.br/handle/123456789/33166. Acesso em: 28 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.