We develop hard and soft magnetic, as well as electrically conductive filaments for the additive manufacturing of electric motors and electromagnets in order to achieve the highest possible weight reduction with low thermal losses. In addition, superparamagnetic nanoparticles are integrated into plastic and extruded into filament to produce magnetic cores for HF electric motors.
Plastic-based metal-filled filament is shaped using the FDM 3D printing process. The manufactured components have increased flexural strength and abrasion resistance due to the metal particles embedded in the plastic matrix. Due to the reduced overall weight of the component compared to the metal component, a vibration reduction is achieved.
Plastics are ground into microparticles of less than 50 µm. The microparticles are then coated with smaller silica-based particles to prevent agglomeration of the plastic particles. The particles are used for electrophotographic 3D printing and will later find application in the aerospace industry, among others.
Magnetite particles are coated with graphene and processed into electrodes, which are measured using an electrochemical potentiometer and their electrical capacity is determined. This represents the first approach to the production of lithium-free electrodes.
The electrically conductive filament is printed into electrodes with a special geometry to create a maximum contact area. These electrodes are arranged planar to each other in a sensor and enable the measurement of the dielectric properties and thus the chemical composition of liquids. Later fields of application will be the petrochemical industry and environmental analysis.