Articles
  • Effect of spodumene addition on pyroplastic deformation of porcelain stoneware 
  • Tuna AYDINa,* and Alpagut KARAb,c
  • a Kirikkale University, Engineering Faculty, Metallurgy and Material Engineering Department, 71451, Kirikkale, Turkey b Anadolu University, Iki Eylul Campus, Department of Material Science and Engineering, 26555, Eskisehir, Turkey c Ceramic Research Center, 26555, Eskisehir, Turkey
Abstract
Lithium aluminosilicates, such as spodumene, have been used as raw materials in the production of thermal shock resistant whiteware and sanitaryware. The presence of spodumene causes enhancement of mullitization and imparts better physical and mechanical properties to ceramics. In this study, the influence of Li2O-content on the properties of a standard porcelain stoneware body was investigated. Sodium feldspar was replaced by the spodumene in varying amounts (up to 4 wt. %). The results showed a significant microstructural improvement, the presence of spodumene which, during firing, allows the development of a low viscosity liquid phase with a decrease of closed porosity, also with increasing bulk density and bending strength.

Keywords: Porcelain stoneware; Spodumene; Pyroplastic deformation; Sintering

This Article

  • 2014; 15(6): 486-491

    Published on Dec 31, 2014