Sustainable Saggar-Preparation Based on Recycled Silicon Carbide and Alumina Powders

Ceramic waste from broken kiln furniture, crucibles and saggars of the technical ceramic industry accumulates each year in very large amounts. It contains highly valuable materials like silicon carbide (SiC) and alumina (Al2O3). A recycling of this materials is indispensable to reduce the raw material consumption and waste production, thus decreasing the environmental impact of this industry. In this study, the recyclability of SiC and Al2O3 containing waste has been investigated. Recycled powders have been pre-processed and alumina-based recipes have been developed with the aim to produce recycling-saggars by pressure die casting. Saggars based on the developed materials have been prepared and tested under realistic application conditions.