Structural and dielectric studies of the Na0.5Bi0.5TiO3–BiFeO3 system

✍ Scribed by V. Dorcet; P. Marchet; G. Trolliard

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 764 KB
• Volume: 27
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2007.02.173

✦ Synopsis

Solid solutions (1x)NBT-xBF, between rhombohedral compounds Na 0.5 Bi 0.5 TiO 3 (NBT) and BiFeO 3 (BF) were studied and a continuous R3c solid solution was evidenced. Lattice parameters and rhombohedral distortion evolution with BF content were studied. The "a" pseudo-cubic parameter (a p ) increases linearly with BF rate, as the "α" pseudo-cubic one (α p ) presents a more complex behaviour. The study of the dielectric properties evidenced two different ranges, with a limit composition around 50% of BF. TEM studies of the reciprocal space showed that the relaxor behaviour of NBT-rich samples is correlated both with superstructure spots and diffusion rows along some particular directions.