Comment on “Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO3 ceramics wit

• 作 者: Alexander Tkach Olena Okhay
• 机 构: CICECO-Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of
• 出 处: 材料科学技术（英文版）
• 发表日期: 2021年6期
• 关键词: SrTiO3 ceramics Doped dielectrics Perovskite structure Giant permittivity

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.