Development of a glazed clay body suitable for cookware

Abstract

Development of a glazed red clay cookware body with adequate thermal shock resistance was successfully locally available raw materials. Thermal compatibility of red clay and different fritted glazes were investigated thermal expansion and thermal shock resistance of individual body/glaze components. Four clay body mixtures prepared incorporating different proportion of quartz (10%, 20%, 30% and 40%) by dry weight to thermal expansion and tested with glazes. Suitable body and glaze compositions were selected and cookware samples were fabricated and required properties were tested under actual domestic conditions. red clay body with 25% quartz having a coefficient of thermal expansion 60.31x10'' Kl and thermal shock 0.97 kJ m~'s~2 and the glazes having coefficient of thermal expansion in the range of (49-51) xlO7 K1 shock resistance in the range of (1.10-1.20) kJm^s'1 could be effectively used to manufacture a glazed cookware product.