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Lead Zirconate Titanate–Magnetoplumbite Composites: A First Step Toward Multiferroic Ceramics?
Author(s) -
Silvestroni Laura,
Kleebe HansJoachim,
Kungl Hans,
Lauterbach Stefan,
Müller Mathis,
Hoffmann Michael J.
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03192.x
Subject(s) - lead zirconate titanate , materials science , microstructure , dopant , ceramic , multiferroics , ferromagnetism , phase (matter) , transmission electron microscopy , composite material , titanate , chemical engineering , ferroelectricity , mineralogy , doping , nanotechnology , dielectric , chemistry , condensed matter physics , physics , optoelectronics , organic chemistry , engineering
When lead zirconate titanate (PZT) is acceptor doped way above the solubility limit of Fe 3+ , crystalline secondary phases become thermodynamically stable that are antiferromagnetic and ferromagnetic, i.e., plumboferrite, PbFe 4 O 7 , and magnetoplumbite (MP), PbFe 12 O 19 , respectively. Three materials were studied by X‐ray diffractometry and transmission electron microscopy, with 3 mol% Fe (B‐site) and high volume fractions of iron, which corresponds to a 1.5 and 6 mol% of MP addition, with emphasis placed on the phase and microstructure evolution, depending on the dopant level. Although the addition of the high iron content resulted in the formation of the desired ferromagnetic phase MP, homogeneously dispersed within the PZT host matrix, the densification kinetics became quite sluggish, resulting in rather porous multiferroic ceramics.