Experimental and theoretical investigation of SrFe12O19 nanopowder for permanent magnet application. Issue 17 (1st December 2017)

• Record Type: Journal Article
• Authors: Abraime, B.; Ait Tamerd, M.; Mahmoud, A.; Boschini, F.; Benyoussef, A.; Hamedoun, M.; Xiao, Y.; El Kenz, A.; Mounkachi, O.
• Is Part Of: Ceramics international. Volume 43:Issue 17(2017)
• Page Start: 15999
• Page End: 16006
• Publication Date: 2017-12-01
• Subjects: Strontium M-type hexagonal ferrites -- Permanent magnet -- Magnetic properties -- Ab-initio calculations; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.08.187
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Strontium M-type hexagonal ferrites were synthesized at different calcination temperatures (800 °C, 1000 °C and 1100 °C) using sol-gel autocombustion method. Thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Mössbauer spectroscopy (MS) and superconducting quantum interference device magnetometer (SQUID) techniques were used to characterize crystal structure, phase composition, morphology and magnetic properties. TGA gives T = 800 °C as beginning of suitable calcination. Hexaferrite structure of single phase is obtained according to XRD results for all samples with crystallite size between 28 nm and 35 nm. SEM images show the growth of grain size with increasing of annealing temperature. (BH)max is calculated based on SQUID results and shows an enhancement between T = 800 °C and T = 1000 °C of 25%. The magnetic properties observed at low temperature are explained and confirmed by ab-initio calculations.