Abstract With this contribution, as a comment to the publication in Acta Materialia 164 (2019) 76, reporting point defect structure and giant dielectric response in La-doped strontium titanate ceramics, we show that the reported ceramics should have a strong effect of O vacancies instead of possessing displaced Ti, Ti vacancies and Schottky defects within their crystal lattice and therefore suggested mechanisms for the giant permittivity response have to be reconsidered. Some data analysis are also found to be contradictive to the literature or incomplete.

中文翻译：

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评“大介电常数La掺杂SrTiO3陶瓷的点缺陷结构”

摘要 通过这一贡献，作为对 Acta Materialia 164 (2019) 76 发表的文章的评论，报告了 La 掺杂的钛酸锶陶瓷中的点缺陷结构和巨介电响应，我们表明所报道的陶瓷应该具有很强的 O 空位影响而不是在其晶格内具有置换的 Ti、Ti 空位和肖特基缺陷，因此必须重新考虑巨介电常数响应的建议机制。一些数据分析也被发现与文献相矛盾或不完整。