Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 42, Issue 3, Pages 1014-1022Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2021.10.062
Keywords
Rare-earth-free permanent magnets; Hexaferrites; Cold sintering process; Organic solvent; Magnetic properties
Categories
Funding
- Ministerio Espanol de Ciencia e Innovacion (MICINN) [MAT2017-86540-C4-1-R, RTI2018-095303-A-C52]
- European Commission [720853]
- Comunidad de Madrid [2017-t2/IND5395]
- MICINN [RYC-2017-23320, FJC2018-035532-I]
Ask authors/readers for more resources
This study investigated the influence of different organic solvents on SrF12O19 platelet-based permanent magnets during the cold sintering process, revealing that the choice of solvent affects magnetic response, morphology, and structural properties. Additionally, post-annealing was found to improve the mechanical integrity and magnetic properties of the ferrite magnets.
In this work we have investigated the effect of the solvent during the processing of SrF12O19 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 degrees 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 degrees 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 %. H-C >= 2.1 kOe and Ms of 73 emu/g are obtained in the final sintered ceramic magnets, exhibiting the highest H-C value of 2.8 kOe for the magnet sintered using glacial acetic acid.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available