info:eu-repo/semantics/article
Densification of lightweight aluminum borate ceramics by direct sintering of milled powders
Fecha
2018-10Registro en:
Hernández, Maria Florencia; Suárez, G.; Baudin, C.; Pena Castro, P.; Aglietti, Esteban Fausto; et al.; Densification of lightweight aluminum borate ceramics by direct sintering of milled powders; Taylor & Francis Ltd; Journal of Asian Ceramic Societies; 6; 4; 10-2018; 374-383
2187-0764
CONICET Digital
CONICET
Autor
Hernández, Maria Florencia
Suárez, G.
Baudin, C.
Pena Castro, P.
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
Resumen
Dense aluminum borate (Al 18 B 4 O 33 ) materials were processed by simple milling-sintering of aluminum borate powders obtained by reacting calcined alumina and fine boric acid at temperatures of around 600–800ºC. The effect of milling on the grain size and sintering behavior of the aluminum borate powders was also determined. Sintering began at around 1000°C and was limited by the thermal decomposition (T > 1300 °C) of the borate in to alumina and boron oxide, which volatilize at this temperature. Sub-angular and medium spherical sintered grain microstructures were developed. A hardness of 6 GPa and bulk density below 2.5 g/cm 3 were achieved. The results are accomplished encouraging the structural applications of borate materials.