Open AccessEffect of Sr2+doping on the phase transition of BaTiO3 lead-free ferroelectric ceramics
Author(s) -
Sarir Uddin,
Sidra Hameed,
Nisar Ali,
Khaled Althubeiti,
Abid Zaman,
Hussein Alrobei,
Muhammad Mushtaq,
Asad Ali,
Fozia Sultana
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac22c3
Subject(s) - ferroelectricity , materials science , dielectric , analytical chemistry (journal) , curie temperature , perovskite (structure) , calcination , mineralogy , phase transition , phase (matter) , doping , crystallography , chemistry , condensed matter physics , ferromagnetism , physics , optoelectronics , organic chemistry , biochemistry , chromatography , catalysis
The single phase Ba 1−x Sr x TiO 3 (x = 0, 0.4, 0.8) ceramic compositions were fabricated through solid state (mixed oxides) method calcined at 850 °C and sintered at 1200 °C in air. The XRD patterns revealed the single phase BaTiO 3 composition with a space group of pm-3m. The shifting of the (1 0 0) XRD peak to higher 2 θ values is accredited to the substitution of comparatively smaller ion of Sr 2+ (1.4 Å) for larger Ba 2+ (1.6 Å) ion following the Braggs diffraction law (2dsin θ = m λ ). The phase transition or Curie point from polar ferroelectric phase to non-polar paraelectric phase of Ba 1−x Sr x TiO 3 was reported to decrease with increasing Sr 2+ content in Ba 1−x Sr x TiO 3 compositions. The value of the dielectric constant decreased with increasing the content of Sr 2+ , which may be attributed to the substitution of comparatively smaller ion of Sr 2+ for Ba 2+ in the perovskite structured Ba 1−x Sr x TiO 3 .