Silicon Nitride

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

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).

Technical data

Content of organics:
21.5 mass-%
Green density of filament:
2.200 g/cm3
Sintered density:
3.20 ? 3.25 g/cm3
Micro hardness:
15 ? 18 GPa
Sintering temperature:
1.680 ? 1.750°C
Sintering atmosphere:
nitrogen, 10 ? 50 bar
Coeff. of lin. therm. exp. [10-6K-1]:
Thermal con-ductivity [W/mK]:
Electrical conductivity:
Linear shrinkage* (X/Y printing direction):
LSx/y = 18.7 % ? SF = 1.230
Linear shrinkage* (Z printing direction):
LSz = 20.3 % ? SF = 1.255
*from printed to sintered dimensions
scaling factor SF

How to use

Printing temperature:
Bed temperature:
Printing speed:
Fan setting:
Off (no fan cooling)
Recommended nozzle diameter:
Recommended nozzle type:
Hardened steel or rubin

Ceramic filaments manufactured by SiCeram GmbH & Spectrum Filaments are based on a polyamide, which distinguishes them from other, comparable sinterable filaments for 3D printing. Ceramic filament prints at very low temperatures, at 150-170°C with a bed temperature of 60-70°C.



The Silicon Nitride filament is much more brittle than standard plastic filaments for 3D printing. Due to the fact that the filament can be crushed / grounded through the feeding mechanism, it is recommended to use devices with a drive that feeds the filament into the extruder smoothly without too much pressure.


  • components for mechanical engineering in general
  • forming tools in metal industry
  • aeronautics and space
  • astronomy


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Check the course of diameter on the entire length of the spool, ovality, mean diameter and standard deviation for each manufactured spool individually.

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A wide range of products

Wide portfolio consisting of over 50 filaments with a versatile range of properties and applications, divided into three segments: desktop easy-to-use, industrial grade and high performance.

High quality

Innovation, extrusion know-how and highest quality filaments are the pillars of Spectrum philosophy. Our team is working continously on the development of new materials and their applications.

European made

All filaments from our portfolio are in-house made. We use modern production lines equipped with non-standard solutions to obtain highest quality final product.

Professional technical support

Our qualified support team helps at every stage from material selection to the 3D printing process.

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