Sintering Behavior of AL₂O₃ Ceramics Doped with Pre-Sintered NB₂O₅ and LiF

Abstract:

A study was carried out on the behavior during the sintering of Al₂O₃ ceramics with pre-sintering of the additives Nb₂O₅ and LiF at different temperatures. It was observed through XRD and DSC the formation of the LiNb₃O₈, Nb₃O₇F and LiNbO₃ phases during the pre-sintering of the additive powders and the formation of the LiAl₅O₈, AlNbO₄ phases during the sintering of the samples The samples showed densities around 91% of the theoretical density, and pre-sintered samples showed low growth in grain size.

• Periodical: Materials Science Forum (Volume 1012)
• Pages: 190-195
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1012.190
• Online since: October 2020
• Authors: Pedro Henrique Poubel Mendonça da Silveira, Paulo Roberto Rodrigues de Jesus, Matheus Pereira Ribeiro, Sergio Neves Monteiro*, Julio César Soares De Oliveira, Alaelson Vieira Gomes
• Keywords: Al₂O₃ Ceramics, Densification, Liquid Phase Sintering, Pre-Sintering

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