• Pavkov, Vladimir
• Bučevac, Dušan
• Matović, Branko
• Cvijović-Alagić, Ivana
• Maksimović, Vesna
• Bakić, Gordana
• Prekajski Đorđević, Marija

Abstract

<jats:p>In the present study, andesite basalt originated from the deposit site ?DonjeJarinje?, Serbia, was examined as a potential raw material for high-densityceramics production. The production of high-density ceramics included drymilling, homogenization, cold isostatic pressing and sintering in the air.To determine the optimal processing parameters the sintering was conductedat 1040, 1050, 1060, 1070 and 1080?C, and afterwards the sintering durationwas varied from 30 to 240min at the optimal sintering temperature of 1060?C. Characterization of the starting and sintered materials included theestimation of particle size distribution, density, hardness and fracturetoughness complemented with X-ray diffraction, optical light microscopy,scanning electron microscopy and energy dispersive spectroscopy analysis.Phase transformations did not occur during processing in the investigatedtemperature range from 1040 to 1080?C. The obtained research results showedthat 99.5% of relative density and the highest hardness and fracturetoughness values of 6.7GPa and 2.2MPa?m1/2, respectively, were achieved forthe andesite basalt sintered at 1060?C for 60min in the air. The results ofthe present study confirmed that the sintered andesite basalt can be used asa high-density ceramic material for various industrial applications.</jats:p>

Topics

• density
• phase
• scanning electron microscopy
• x-ray diffraction
• hardness
• ceramic
• homogenization
• sintering
• spectroscopy
• isostatic pressing