Mg2+ doping effects on the structural and dielectric properties of CaCu3Ti4O12 ceramics obtained by mechanochemical synthesis
Authors:
- Piotr Dulian,
- Wojciech Bąk,
- Mateusz Piz,
- Barbara Garbarz-Glos,
- Olena V. Sachuk,
- Krystyna Wieczorek-Ciurowa,
- Agata Lisińska-Czekaj,
- Dionizy Czekaj
Abstract
In this study, ceramic CaCu3Ti4O12 (CCTO) and CaCu3−xMgx Ti4O12 solid solutions in which 0.1 ≤ x ≤ 0.5 were prepared by the mechanochemical method, realized by a high-energy ball milling technique. The effects of the Mg2+ ion concentration and sintering time on the dielectric response in the prepared ceramics were investigated and discussed. It was demonstrated that, by the use of a sufficiently high energy of mechanochemical treatment, it is possible to produce a crystalline product after only 2 h of milling the mixture of the oxide substrates. Both the addition of magnesium ions and the longer sintering time of the mechanochemically-produced ceramics cause excessive grain growth and significantly affect the dielectric properties of the materials. The X-ray diffraction (XRD) analysis showed that all of the as-prepared solid solutions, CaCu3−x MgxTi4O12 (0.0 ≤ x ≤ 0.5), regardless of the sintering time, exhibit a cubic perovskite single phase. The dielectric study showed two major contributions associated with the grains and the grain boundaries. The analysis of the electric modules of these ceramics confirmed the occurrence of Maxwell–Wagner type relaxation, which is dependent on the temperature.
- Record ID
- CUTb9cbbe9fdbe04b658e214961bd69ebec
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2021
- Vol
- 14
- No
- 5
- Pages
- [1-14]
- Article number
- 1187
- Other elements of collation
- fot.; wykr.; Bibliografia (na s.) - 13-14; Bibliografia (liczba pozycji) - 36; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 14, Iss. 5, Spec. Iss.
- Substantive notes
- Special Issue: Functional Materials for Energy Conversion and Storage
- Keywords in English
- CaCu3Ti4O12 (CCTO), ceramics, dielectric spectroscopy, mechanochemical synthesis, relaxation processes
- DOI
- DOI:10.3390/ma14051187 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/14/5/1187 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTb9cbbe9fdbe04b658e214961bd69ebec/
- URN
urn:pkr-prod:CUTb9cbbe9fdbe04b658e214961bd69ebec
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