Gabriela's project page

Magnetic Anisotropy and Particle Distribution through Strontium ferrite/PA-12 FFF 3D printer filament.

Gabriela Espinoza Rodriguez

Strontium Ferrite (SF) is an important hard magnetic material with a ferrimagnetic structure which can be used for 3D printing of permanent magnets used in generators that convert mechanical energy to electrical energy. SF/PA-12 thermoplastic composite filaments were produced using a twin-screw extruder. Magnetic SF powder was mixed with PA-12 polymer to create Fused Filament Fabrication (FFF) filament in which the PA-12 keeps together the SF particles. Although experimental data on the distribution of the magnetic particles through the filament does not exists yet, theoretical computational groups have determined that upon extrusion the non-spherical SF platelets will arrange themselves with their long axis parallel to the filament’s cylindrical axis. According to the calculations, this alignment is stronger near the outer surface of the filament while no alignment is expected near the center of the filament.

Presentations:
[1] Gabriela Espinoza Rodriguez, W. Geerts, J. Tate, O. Arigbabowo, Magnetic Anisotropy and Particle Distribution through Strontium ferrite/PA-12 FFF 3D printer filament, poster presentation STEM conference Texas State University, March 2023.
[2] Gabriela Espinosa Rodriguez, Oluwasola Arigbabowo, Jonathan Alvarado, Jitendra Tate, Wilhelmus J. Geerts, "Crystal Anisotropy of Strontium Ferrite and PA-12 Fused Filament Fabrication (FFF)", oral presentation MMM-2023 conference, 10/30/2023-11/3/2023, Dallas.

Refereed Publications:
[1] Gabriela Espinosa-Rodriguez, Oluwasola Arigbabowo, Jonathan Alvarado, Jitendra Tate, Wilhelmus J. Geerts, “Wire Texture C-axis Distribution of Strontium Ferrite / PA-12 Extruded Filament”, AIP Advances 14, 025245 (2024) (impact factor 1.697).
[2] "Magnetic Anisotropy of Strontium Ferrite / PA-12 3D Filaments Used for 3D Printing of Permanent Magnets", Gabriela Espinosa Rodriguez, MSc. Texas State University, May 2024. Thesis.

Gabriela graduated in May 2024 and is currently employed with ElectronInk in Austin.