Per: Pedro Henrique poubel mendonca da silveira (instituto militar de engenharia), eliziane medeiros dos santos (instituto militar de engenharia), márcio jardim de oliveira (instituto militar de engenharia), Hiron Akira Yamada Magalhães4 (instituto militar de engenharia), Luana Cristyne da Cruz Demosthenes (instituto militar de engenharia), Raphael Henrique Morais Reis (instituto militar de engenharia), paulo roberto rodrigues de jesus (instituto militar de engenharia), jheison lopes dos santos (instituto militar de engenharia), alaelson vieira gomes (instituto militar de engenharia)
Abstract:
In alumina processing, one of the most widely used grinding methods is the ball mill. It is a time-consuming, costly process, as well as not reducing the sintering temperature while maintaining high densification values. Considering this, a comparison of this method with the high energy mill was made. Alumina powders added with niobium and lithium fluoride, polyethylene glycol as binder, addition of 92.8° alcohol and alumina beads were used. Green bodies were prepared by cold uniaxial pressing and sintered at 1300°C and 1400°C. With the Archimedes assay, there was an improvement in the densification of the samples processed with the high energy mill, with mean densification values at 1300°C in 89,96%, with a mean density of 3.5962 g/cm³, at 1400°C in 91,06% average density and 3.6394 g/cm3 average density. Already in the ball mill, at 1300°C resulted in 79,39% and 3.1774 g/cm³, and at 1400°C, 89,90% and 3.5934 g/cm³.