SiCeram GmbH in cooperation with Spectrum Filaments have developed an innovative and innovative series of ceramic materials for 3D printing in FDM/FFF technology! Four specialized filaments are the first commercial solution of this type on the global market, allowing 3D printing of high-tech ceramic using typical desktop 3D printers.
3D-printing is a new additive forming technology for ceramic components. It will find its application mainly for fabrication of prototypes, small series or complex geometries, with internal hollow spaces e.g., which are not able to be produced by other, traditional techniques.
Silicon Nitride filament contains high purity ceramic powder. The use of appropriate organic agents as a binder allows to obtain a flexible filament that can be used in classic 3D printers operating in the FFF/FDM technology. The organics content of the filament amounts to ca. 21.5 mass-%.
Si3N4 exhibits higher strength and fracture toughness than SSiC. The very low coefficient of linear thermal expansion leads to a high thermal shock resistance. Si3N4 is an electrical insulator and its thermal conductivity is 30 W/mK (25 % of SSiC).
The wettability of Si3N4 by non-ferrous metals and glass melts is very low thus qualifying it as tooling material. The maximal operating temperature lies in the range of 1,300 ? 1,400°C. Due to the oxide sintering additives alumina and yttria good corrosion resistance is given only in the acidic range (pH < 7).