Processing and characterization of (1-x)(Na1/2Bi1/2)TiO3- xLa(Mg1/2Ti1/2)O-3 ceramics
authors Salak, AN; Vyshatko, NP; Kholkin, AL; Ferreira, VM; Olekhnovich, NM; Radyush, YV; Pushkarev, AV
editors Vilarinho, PM
nationality International
journal ADVANCED MATERIALS FORUM III, PTS 1 AND 2
author keywords perovskite; sodium-bismuth titanate; relaxor; lead-free
keywords LEAD-FREE; DIELECTRIC-PROPERTIES; SOLID-SOLUTIONS; RELAXOR; BEHAVIOR; TEMPERATURE; TRANSITION; CONSTANT; TITANATE; STATE
abstract Lead-free relaxor ceramics based on sodium-bismuth titanate, (1-x)(Na1/2Bi1/2)TiO3-xLa(Mg1/2Ti1/2)O-3 [(1-x)NBT-xLMT] (0 <= x <= 0.25), were prepared by both the conventional mixed oxide method and by the Pechini route, and their crystal structure and dielectric properties were investigated. All the compositions studied were found to possess a rhombohedrally distorted crystal lattice at room temperature. A distortion degree of the unit cell decreases and its volume increases with LMT content. The temperature of the dielectric permittivity maximum does not change with increasing substitution rate. As x is increased, the frequency-dependent dielectric peaks are flattened. The compositional evolution of structure and dielectric characteristics of the ceramics obtained are analysed and discussed in respect to size, charge and polarizability of the cations involved.
publisher TRANS TECH PUBLICATIONS LTD
issn 0255-5476
year published 2006
volume 514-516
beginning page 250
ending page 254
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000238056400052

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