Novel Magnetic Inorganic Composites: Synthesis and Characterization
Marco Natali1, Sergio Tamburini1, Roberta Bertani2
1ICMATE, CNR, Corso Stati Uniti 4, 35127 Padova, Italy.
Polymers
|April 30, 2021
Summary
New magnetic geopolymers incorporating strontium hexaferrite particles demonstrate enhanced mechanical strength and magnetization. These advanced materials offer improved properties for practical applications in composites.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Nanotechnology
Background:
- Magnetic particles enhance inorganic matrices.
- Magnetite in concrete improves mechanical properties and durability.
- Strontium hexaferrite (SrFe12O19) is a key magnetic material.
Purpose of the Study:
- To prepare and characterize novel magnetic geopolymers.
- To investigate the effect of SrFe12O19 concentration and external magnetic fields.
- To evaluate mechanical, magnetic, and electrical properties.
Main Methods:
- Geopolymer synthesis with two matrices (G1, G2) and SrFe12O19 (6%, 11%).
- Comprehensive characterization: chemical, structural, morphological, mechanical, magnetic, and electrical.
- Application of external magnetic field during solidification.
Main Results:
- SrFe12O19 particles showed relatively good dispersion.
- High concentration of SrFe12O19 under magnetic field significantly increased remanent magnetization.
- Composites exhibited superior compressive strength compared to magnetite concretes.
- Electrical resistance correlated with matrix composition and geopolymerization degree.
Conclusions:
- Novel magnetic geopolymers with enhanced properties were successfully synthesized.
- The developed materials show potential for advanced applications requiring magnetic and mechanical performance.
- Electrical impedance is a viable method for assessing geopolymerization.
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