Comment on "Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO3 ceramics with Sr deficiency". (28th February 2021)

• Record Type: Journal Article
• Authors: Tkach, Alexander; Okhay, Olena
• Is Part Of: Journal of materials science & technology. Volume 65(2021)
• Page Start: 151
• Page End: 153
• Publication Date: 2021-02-28
• Subjects: SrTiO3 ceramics -- Doped dielectrics -- Perovskite structure -- Giant permittivity; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2020.05.064
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: With this contribution, as a comment to the publication in Journal of Materials Science & Technology 44 (2020) 54, reporting giant dielectric response, structural characterization and numerical simulations in Sr1-1.5 x Bi x TiO3 ceramics, we show that the reported results are rather contradicting and not well analysed, while the suggested mechanism for the giant permittivity response is not valid or doubtful and has to be reconsidered. Moreover, many details and data are missing making impossible not only to call the obtained results very suitable for practical application but even to reproduce them.