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

被引：8
|
作者：
Shahraki, Mohammad Maleki [1 ]
Mahmoudi, Pezhman [2 ]
Karimi, Asadollah [3 ]
机构：
[1] Univ Maragheh, Fac Engn, Dept Mat Engn, Maragheh 5518183111, Iran
[2] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran 113659466, Iran
[3] Univ Maragheh, Fac Engn, Dept Chem Engn, Maragheh 5518183111, Iran
来源：
MATERIALS LETTERS | 2020年 / 267卷
关键词：
Ceramics; (In; Nb) co-doped TiO2; Air quenching; Dielectrics; CACU3TI4O12; CERAMICS; NB PLUS; PERMITTIVITY;
D O I：
10.1016/j.matlet.2020.127513
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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*10(3) to 26*10(4) 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. (C) 2020 Elsevier B.V. All rights reserved.
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页数：3
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