Fabrication and characterization of aluminium titanate and mullite added Porcelain ceramics
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In this study, aluminium titanate (AT, Al2TiO5) and mullite (M, 3Al2O3·2SiO2) ceramics were synthesized by reaction sinteringfrom Al2O3, SiO2 and TiO2 powders which consisted of homogenization by wet ball milling followed by sintering AT and Min air at 1550 oC for 2 hrs and 1400 oC for 2 hrs, respectively. AT and M in different amounts (0 and 20 wt. %) were mixedwith Porcelain (P). AT and M reinforced porcelain ceramics were prepared by the powder metallurgy route. After drying, thepowders were compressed to preforms of 56x12x10 mm by uniaxial pressing at 200 MPa. The green compacts were sinteredat 1100-1200 oC for 1-5 hr under air. Investigations were carried out, on the effect of addition of AT and M in terms of physicalproperties, microstructure, XRD phases, as well as wear and mechanical properties of AT and M-reinforced porcelain ceramiccomposites. Phase and microstructural characterizations of the sintered materials were carried out by using X-ray diffractiontechnique (XRD) and scanning electron microscope (SEM). The Micro Vickers hardness testing was performed using theShimadzu HMV-MIII hardness tester.
Abstract
In this study, aluminium titanate (AT, Al2TiO5) and mullite (M, 3Al2O3·2SiO2) ceramics were synthesized by reaction sinteringfrom Al2O3, SiO2 and TiO2 powders which consisted of homogenization by wet ball milling followed by sintering AT and Min air at 1550 oC for 2 hrs and 1400 oC for 2 hrs, respectively. AT and M in different amounts (0 and 20 wt. %) were mixedwith Porcelain (P). AT and M reinforced porcelain ceramics were prepared by the powder metallurgy route. After drying, thepowders were compressed to preforms of 56x12x10 mm by uniaxial pressing at 200 MPa. The green compacts were sinteredat 1100-1200 oC for 1-5 hr under air. Investigations were carried out, on the effect of addition of AT and M in terms of physicalproperties, microstructure, XRD phases, as well as wear and mechanical properties of AT and M-reinforced porcelain ceramiccomposites. Phase and microstructural characterizations of the sintered materials were carried out by using X-ray diffractiontechnique (XRD) and scanning electron microscope (SEM). The Micro Vickers hardness testing was performed using theShimadzu HMV-MIII hardness tester.
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