ConclusionsThe laser sintering of ceramic powders by LSD has been demonstrated as an additive manufacturing technology for fabrication of complex ceramic parts. Compared with powder‐based technologies, LSD provides powder beds with an improved green density, which in turn increases the density of the final part. On the other hand, anisotropies related to a layer‐by‐layer sintering of three‐dimensional structures clearly show the demand for a better control of the local laser‐sintering process. The energy provided by a laser must be absorbed uniformly within a layer to improve uniformity in sintering. Opening an optical window for the laser light to penetrate the volume of the powder bed is a basic prerequisite for its more uniform sintering. It could be shown that the particle size distribution of the powder in use is a critical parameter for opening this optical window.