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Air quenching as a reliable technique to obtain colossal dielectric constant with low loss in (In, Nb)-co doped TiO2

Maleki Shahraki, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matlet.2020.127513
  3. Publisher: Elsevier B. V , 2020
  4. Abstract:
  5. In this research, for the first time, the effect of air quenching on the microstructural and electrical properties of (In, Nb) co-doped TiO2 was investigated. The FE-SEM images showed that the air quenching has no effect on microstructure of co-doped TiO2. However, air quenching affected the electrical properties so that the dielectric constant in the frequency of 1 kHz at room temperature sharply enhanced from 21*103 to 26*104 and the dielectric loss surprisingly decreased from 0.6 to 0.1. This incredible improvement in the dielectric properties is attributed to the electron-pined defect dipoles which has been activated through air quenching. © 2020 Elsevier B.V
  6. Keywords:
  7. (In, Nb) co-doped TiO2 ; Dielectrics ; Dielectric losses ; Dielectric materials ; Dielectric properties ; Niobium compounds ; Quenching ; Titanium dioxide ; Air quenching ; Ceramics ; Co-doped ; Colossal dielectric constant ; Defect dipoles ; Low-loss ; Micro-structural ; SEM image ; High-k dielectric
  8. Source: Materials Letters ; Volume 267 , May , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0167577X20302184