Open AccessMultiferroic heterostructure BaTiO3/ε-Fe2O3 composite obtained by in situ reaction
Author(s) -
Suzana Filipović,
Nina Obradović,
Ljubica Anđelković,
Dragan I. Olćan,
Jovana Petrović,
Miljana Mirković,
Vladimir B. Pavlović,
Dejan Jeremić,
Branislav Vlahović,
Ana Đorđević
Publication year - 2021
Publication title -
science of sintering/science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos2101001f
Subject(s) - materials science , scanning electron microscope , multiferroics , microstructure , composite number , analytical chemistry (journal) , sintering , dielectric , chemical engineering , ferroelectricity , composite material , chemistry , chromatography , optoelectronics , engineering
Solid-state reaction between BaTiO3 and Fe2O3 was used to produce a multiferroic heterostructure composite. Commercial BaTiO3 and Fe(NO3)3?9H2O were suspended in ethanol for 30 minutes in an ultrasound bath. The prepared mixture was thermally processed at 300?C for 6 h. Sintering at 1300?C for 1 h resulted in a mixture of different phases, BaTiO3, BaFe12O19 and Ba12Ti28Fe15O84, which were confirmed by x-ray powder diffraction. A dense microstructure with a small volume fraction of closed porosity was indicated by the scanning electron microscopy, while a homogeneous distribution of Fe ions over BaTiO3 phase was visible from energy dispersive spectroscopy mapping. Doping of BaTiO3 with Fe2O3 resulted in formation of magnetic hexaferrite phases, as confirmed by dielectric measurements that showed a broadened maximum of the permittivity measured as a function of temperature.