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    Effect of spodumene addition on pyroplastic deformation of porcelain stoneware
    (Korean Assoc Crystal Growth, Inc, 2014) Aydin, Tuna; Kara, Alpagut
    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.
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    Öğe
    Effects of Alumina on Porcelain Insulators
    (Australian Ceramic Society, 2016) Aydin, Tuna; Kara, Alpagut
    This study was conducted under both industrial and laboratory conditions for improving material properties (i.e. mechanical and electrical) of electroporcelain bodies produced by porcelain insulator factories in Turkey. To achieve this aim, the quartz content of a standard electroporcelain body was substituted by alpha-alumina. The technical and sintering behaviours of quartz and the alumina-substituted bodies were investigated. Results showed that the addition of alumina increased the mechanical and electrical strength of the materials.