Effect of Sr2+doping on the phase transition of BaTiO3 lead-free ferroelectric ceramics. (9th September 2021)

• Record Type: Journal Article
• Authors: Uddin, Sarir; Hameed, Sidra; Ali, Nisar; Althubeiti, Khaled; Zaman, Abid; Alrobei, Hussein; Mushtaq, Muhammad; Ali, Asad; Sultana, Fozia
• Is Part Of: Materials research express. Volume 8:Number 9(2021)
• Publication Date: 2021-09-09
• Subjects: lead free -- ferroelectrics -- perovskites -- solid state route; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ac22c3
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: The single phase Ba1−x Srx TiO3 (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 BaTiO3 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 Ba1−x Srx TiO3 was reported to decrease with increasing Sr 2+ content in Ba1−x Srx TiO3 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 Ba1−x Srx TiO3 .