Abstract
In this work, the feldspar used as a flux in typical porcelain was replaced by waste glass, and the resulting batch composition contained 50% kaolin, 25% quartz and 25% waste glass. The properties of this porcelain with glass powder (GP) were compared to traditional porcelain (TP), which utilizes feldspar. The samples were fired at different temperatures, ranging from 1200 °C to 1400 °C. Technical parameters, such as water absorption, modulus of rupture and K IC, phase analysis by XRD, and microstructure by SEM were analysed. The results indicated that the lower fracture toughness and MOR of GP is a consequence of the peculiar microstructure of this porcelain. The reduction in firing temperature and the use of a cheaper substitute for feldspar makes GP also an attractive economical alternative.
Highlights
The choice of recyclable materiais to replace conventional raw materiais must be made carefully
The results indicated lhat lhe lower fracture toughness and MOR of glass powder (GP) is a consequence of lhe peculiar lnicrostructure of lhis porcelain
Wt. (o/o) feldspar and lhe olher one was composed of 50% wt. (o/o) of kaolin, 25 % wt. (o/o) quartz and 25%
Summary
The choice of recyclable materiais to replace conventional raw materiais must be made carefully. The second step is to make sure lhat lhe cerarnic product is inert during usage. This is especially important in lhe case of dinnerware, sanitary ware, and so on. Lhe use of recycled colorless glass in lhe substitution of feldspar in lhe porcelain production, as proposed in lhis work, seems to be very suítable and envíronmentally safe. The total amount of glass collected in lhe cities for recycling exceeds 339,000 tons. The aim oflhis work was to evaluate lhe qualíty oflhe porcelain tllat can be made using glass powder. Samples were produced and fired in laboratory scale Technical pararneters such as water absorption, shrinkage, modulus of rupture, apparent porosíty, densíty, weight loss and fracture toughness were deterlnined. The phases present in lhe lnicrostructure were evaluated using Scanning Electron Microscopy and X~ray diffractometry
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