Effect of organic solvent on the cold sintering processing of SrFe12O19 platelet-based permanent magnets

In this work we have investigated the effect of solvent during processing SrFe12O19 platelet-based permanent magnets by cold sintering process (CSP) plus a post-thermal treatment. Several organic solvents: glacial acetic acid, oleic acid and oleylamine been analyzed, optimizing CSP temperatures at 190?270 °C, under pressures 375?670 MPa 6?50 wt% solvent. Modifications in morphological structural properties are identified depending on solvent, which impacts magnetic response. Independently mechanical integrity ferrite obtained is improved post-annealing 1100 °C for 2 h, resulting relative densities around 92 % with an average grain size 1 ?m fraction phase >91 %. HC ? 2.1 kOe MS 73 emu/g final sintered ceramic magnets, exhibiting highest value 2.8 magnet using acid.