Comment on Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO3 ceramics with Sr deficiency

authors	Tkach, A; Okhay, O
nationality	International
journal	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
author keywords	SrTiO3 ceramics; Doped dielectrics; Perovskite structure; Giant permittivity
keywords	RELAXATION
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 Sr1-1.5xBixTiO3 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. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
publisher	JOURNAL MATER SCI TECHNOL
issn	1005-0302
year published	2021
volume	65
beginning page	151
ending page	153
digital object identifier (doi)	10.1016/j.jmst.2020.05.064
web of science category	3
subject category	Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
unique article identifier	WOS:000609935300024