Slurry-Based Laser Sintering of Alumina Ceramics
In this work, a slurry-based laser sintering process is investigated. Laser sintering allows for a broad palette of materials to be used. Since the binder content is only about 16 vol% with respect to the ceramic powder load, the debinding process is faster and less susceptible to crack formation and part warping compared to lithography-based manufacturing. The alumina slurry, used as a starting material for laser sintering, was optimized by adjusting the dispersant content to reach a minimum viscosity. After debinding and furnace sintering, multi-layer alumina parts with densities up to 97% were obtained.