Using synthetic and natural silica powders enables an additive production by high-temperature selective laser sintering (HT-SLS). Particle-diameters in the range of 19...78 μm and spheroidal and vitrified particle-shapes allow to manufacture green bodies. For this purpose, an experimental set up as well as material-specific scan and parameter concepts are developed. Component densities of ρR = 65 % and surface roughness of Ra = 32.21 μm are achieved. Subsequently a glassy, opaque molded body is produced by temperature pressure sintering. The component density increases to ρR = 96 % with a shrinkage of 16%. In order to use the glazed molded body as glass fiber preform, polishing of the shell surface is necessary. Surface roughness of Ra = 10.4 nm can be realized by laser beam polishing.
Basically, HT-SLS is an alternative method to the classical isostatic pressing of glass powder. In particular, an increase in efficiency with regard to the producible component geometry of the green bodies can be achieved.