A comparative study of dielectric, ferroelectric and magnetic properties of BiFeO3 multiferroic ceramics synthesized by conventional and spark plasma sintering techniques. Issue 1 (January 2015)

• Record Type: Journal Article
• Authors: Song, S.-H.; Zhu, Q.-S.; Weng, L.-Q.; Mudinepalli, V.R.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 1(2015:Jan.)
• Page Start: 131
• Page End: 138
• Publication Date: 2015-01
• Subjects: Multiferroics -- Magnetoelectrics -- Ferroelectric properties -- Dielectric properties -- Magnetic properties; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2014.08.016
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: BiFeO3 ferrite ceramics were synthesized by spark plasma sintering (SPS) and conventional solid-state synthesis in conjunction with high-energy ball milling. They were evaluated by different characterization techniques such as X-ray diffraction, scanning electron microscopy, and dielectric, ferroelectric and magnetic measurements. The 750 °C-SPS prepared ceramic samples possessed a single perovskite structure and they were compared with the conventionally synthesized ones. The relative density and average grain size were approximately 95% and <200 nm for the SPS-prepared samples, while they were about 89% and >300 nm for the conventionally prepared ones. In comparison with the conventionally synthesized ceramics, the SPS-prepared ones exhibited improved dielectric, ferroelectric and magnetic properties. These should be associated with high-density, fine-grained and uniform microstructure created by SPS in conjunction with high-energy ball milling, which could be a promising technique for fabricating high-quality BiFeO3 multiferroic ceramics.