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Effect of microstructure on mechanical properties of porcelain stoneware

AutorMartín-Márquez, Jorge; Rincón López, Jesús María; Romero, Maximina
Palabras claveMullite
Porcelain stoneware
Mechanical Properties
Traditional ceramics
Fecha de publicación2010
CitaciónJournal of the European Ceramic Society, 30 (2010) 15, 3063-3069
ResumenThis work examines the effect of microstructure (aspect ratio of mullite crystals and proportion of crystalline and amorphous phases) as well as different physical features (bulk density, closed and open porosity and absolute density) on the mechanical properties of a standard porcelain stoneware composition (50% kaolinitic clay, 40% feldspar and 10% quartz) fired in the 1200º-1300ºC temperature interval using a fast firing schedule. The mechanical behaviour was evaluated in terms of bending strength, Vickers microhardness, fracture toughness and Young’s modulus. After viewing the results, it can be concluded that increased f, Hv and E values were mainly due to open porosity, percentage of mullite phase and morphology of secondary mullite needles, whereas closed porosity and quartz particles have no influence on these properties.
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