Printing Magnetic Material

                Kai von Petersdorff-Campen, a doctoral student in the Department of Mechanical and Process Engineering at ETH Zürich, Switzerland, has developed a printing method called “Embedded magnet printing” (EMP). You can probably guess by the name that this 3D printing technique creates products containing magnets.

                Petersdorff-Campen demonstrated EMP by printing an artificial heart pump prototype and won the first prize for prototyping from the American Society for Artificial Internal Organs. The prototype tested was able to pump 2.5 liters per minute. “My goal was not to make a good heart pump, but to demonstrate the principle of how it can be produced in a single step,” says Petersdorff-Campen.

                The Video here shows how Petersdorff-Campen is trying to get past the multi-step process in magnetic heart pumps. One of the main challenges was getting the magnet to filament ration correct, if it didn’t have enough filament it was too brittle and couldn’t be printed but you need enough magnet to have a strong pull.

                Petersdorff-Campen says: “There is still a lot to improve in terms of material and processing.” For example, his heart pump was able to successfully pump 2.5 liters per minute with 1,000 rotations, but this does not yet meet the standards required in practice: “I wouldn’t want to have such a device implanted.”



Thomas, and Steven Buckridge. “ETH Zurich Scientist 3D Prints Artificial Heart Pump Using Embedded Magnet Printing.” 3ders.Org, 2018,

Jackson, Beau, et al. “ETH Zurich Researcher Develops Magnetic Material for FFF 3D Printers.” 3D Printing Industry, 26 Oct. 2018,