There are a multitude of methods for producing magnetic nanoparticles with a given magnetic behavior (paramagnetic, ferromagnetic, etc.) and a given magnetic category (soft, semi-hard, hard). But for the same composition of precursors and a given process, there is still no simple and effective way to modulate the magnetic category. Based on coprecipitation of precursors and a hydrothermal and/or solvothermal synthesis, this innovative production process allows to easily choose the magnetic category (soft, semi-hard, hard) of the nanocomposites while using the same composition of precursors.
Applications
- Ferrofluids, magneto-rhéological fluids
- Electromagnetic shielding
- Water/soil traitement
- Catalysis
- Energy storage
- Therapeutics and diagnosis
- Antibacterial activity
Competitive advantages
- Possible to obtain different magnetic materials (soft, semi-hard, and hard) while using the same composition
- The coercive field is adjustable according to the synthesis conditions.
- High purity (only presence of Co, Fe, Pr, and O based on an EDX analysis by MET)
- Large range of particle size possible : from 1nm to 500nm or more
- High Specific Surface Area (250-750 m²/g with 5nm nanospheres, depending on the particles shape)
- Low bulk density (< 5 g/cm3)
- No theoretical limit for the injection of these NPs into another material (just below a certain temperature to avoid loss of the secondary phases)
Intellectual property
Patented technology
Keywords
Nanoparticles - Ferrites - Solvothermal - Hydrothermal - Magnetic
