Conceptual design and manufacture of spirally wound alumina tubes with improved thermal shock behavior for refractory applications

Rotationally symmetric refractory nozzles have been fabricated using the spiral winding technique with ceramic alumina green tapes. Different layer designs have been developed in order to obtain a homogeneous fired structure with locally delaminated interfaces, which are expected to improve the thermal shock behavior. In this regard, the microstructure of all fired structures has been investigated. Thermal shock tests have been conducted to evaluate the impact of the layer design on the formation of micro cracks and other damage. Subsequently, the corrosion behavior of these nozzle compositions has been investigated.