In-situ Fabrication of Transparent Magnesium Aluminate Spinel by Spark Plasma Sintering


1 Ceramic, MERC

2 Research Department of Ceramic, Materials and Energy Research Center (MERC)

3 Ceramic Division, MERC


Transparent polycrystalline spinel ceramic was fabricated without any sintering aids by spark plasma sintering method of a mixture of Al2O3 and MgO powders for only 10min soak at 1250°C. Densification, microstructure and optical transparency of spinel were examined. The spinel exhibits an in-line transmission of 55% for a visible-wavelength of 470nm and high hardness value of 2040 HV.