Per: pedro henrique poubel mendonça da silveira (Instituto Militar de Engenharia), Amal Elzubair Eltom (Instituto Militar de Engenharia), Jheison Lopes dos Santos (Instituto Brasileira de Medicna e Reabilitação), Geovana Carla Girondi Delaqua (Universidade Estadual do Norte FLuminense), Carlos Mauricio Fontes Vieira (Universidade Estadual do Norte Fluminense), Alaelson Vieira Gomes (Instituto Militar de Engenharia), Paulo Roberto Rodrigues de Jesus (IME), Marcelo Henrique Prado da Silva (IME)
Abstract:
This study investigated the addition of hematite as a sintering additive for alumina in conventional sintering at 1400°C. Fractions ranging from 0 to 8 wt% of Fe2O3 were added to Al2O3, and their physical and mechanical properties were analyzed. The results showed that the addition of 4 and 6% Fe2O3 reduced the shrinkage of the ceramics, resulting in low densification, highly porous surfaces, and low flexural strength results. However, low additions (0.5, 1, and 2%) of Fe2O3 improved the sintering of Al2O3, presenting higher flexural strength, shrinkage, and densification..