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