Classical or Relaxor Ferroelectric Behaviour of Ceramics with Composition Ba1-xBi2x/3TiO3

• Published in: Physica status solidi. A, Applied research Vol. 184; no. 2; pp. 459 - 464
• Main Authors: Bahri, F., Simon, A., Khemakhem, H., Ravez, J.
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag Berlin GmbH 01-04-2001; WILEY‐VCH Verlag Berlin GmbH; Wiley-VCH
• Subjects: 77.80.Bh; 77.84.Dy; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; Ferroelectricity and antiferroelectricity; Niobates, titanates, tantalates, pzt ceramics, etc; Physics; S10.15; Inorganic compounds; Ferroelectricity; Transition element compounds; Barium titanates; Ceramics; Relaxor; Experimental study; Quaternary compounds; Permittivity; Bismuth Titanates
• ISSN: 0031-8965; 1521-396X
• DOI: 10.1002/1521-396X(200104)184:2<459::AID-PSSA459>3.0.CO;2-0

Crystallographic and low frequency dielectric studies were performed on lead‐free non‐stoichiometric perovskite ceramics of Ba1—xBi2x/3□2x/3TiO3 (0 ≤ x ≤ 0.15) composition. A classical ferroelectric behaviour was shown for x lower than 0.09. A relaxor behaviour appears for higher values of x (0.09 ≤ x ≤ 0.15). The corresponding relaxor characteristics increased as the composition deviated from BaTiO3. Such kind of materials are of interest for environmental‐friendly applications, in particular the ceramic with composition corresponding to x= 0.15, whose maximum of permittivity occurs at 280 K, i.e. close to room temperature.