Using lithium glass infiltration to enhance the properties of alumina bodies

Abstract

The use of an infiltration process to improve the properties of sintered materials has been widely investigated. This work describes the research carried out in the manufacturing of lithium glass-infiltrated alumina. The infiltration material consisted of a mixture of elements such as Li 2 O, ZrO 2 , SiO 2 Al 2 O 3, CaO and La 2 O 3 . Alumina specimens were sintered in air at 1400 °C for 2 hours. A number of samples were then submitted to the infiltration process at 1400 °C for 15 minutes. Sintered and infiltrated specimens were characterized by X ray diffraction, apparent density, open porosity, flexural strengths and scanning electron microscopy. The results showed that the infiltration process considerably improves the properties of alumina bodies.

MICROSTRUCTURAL EVALUATION AND CYTOTOXICITY INVESTIGATIONS OF α-Al2O3 BONE REPLACEMENT MATERIALS

“…The following techniques were employed to characterize the produced sintered α-Al2O3 -MgO ceramics. The relative density, open porosity and water absorption of the sintered materials were determined using Archimedes' method, as specified by European Standard EN 99 (ISO 10545-3, 1991) (Acchar 2008). The vacuum method (ISO 10545-3) was used in the laboratory to determine water absorption with greater precision.…”

Effects of B2O3Addition on the Sintering Behavior of 0-5-10% ZrO2Doped BaTiO3Based Ceramics

“…The relative density and porosity of the sintered materials were determined using Archimedes' water displacement method, as specied by European Standard EN 99 (ISO 10545-3, 1991) [27]. Table I.…”