Dielectric and Electrical Properties of BLT Ceramics Modified by Fe Ions
| Autor: | Mateusz Bara, J. Dzik, Małgorzata Adamczyk-Habrajska, Tomasz Goryczka, Beata Wodecka-Dus, Diana Szalbot |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Permittivity
Phase transition Materials science traditional ceramics Analytical chemistry Dielectric lcsh:Technology X-ray diffraction (XRD) Article Electrical resistivity and conductivity General Materials Science lcsh:Microscopy lcsh:QC120-168.85 lcsh:QH201-278.5 lcsh:T X-ray di raction (XRD) lcsh:TA1-2040 BLTF dielectric properties electrical properties lcsh:Descriptive and experimental mechanics Dielectric loss lcsh:Electrical engineering. Electronics. Nuclear engineering Curie constant lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 Temperature coefficient Solid solution |
| Zdroj: | Materials Volume 13 Issue 24 Materials, Vol 13, Iss 5623, p 5623 (2020) |
| ISSN: | 1996-1944 |
| Popis: | The solid solution of the perovskite type structure Ba0.996La0.004Ti1&minus yFeyO3 (BLTF) for varying iron content (y = 0.1&minus 0.4 mol.%) was obtained as a result of a solid state reaction using the conventional method. At room temperature (Tr < TC), the as-received ceramics reveals a single-phase, tetragonal structure and a P4mm space group. An increase in the iron content causes a slight decrease in the volume of the elementary cell. In addition, this admixture significantly reduces the maximum permittivity value (&epsilon m) and the shift of the phase transition temperature (TC) towards lower temperatures. The BLTF solid solution shows a classical phase transition and low values of dielectric loss tangent (tg&delta ), both at room temperature and in the phase transition area. The Curie&ndash Weiss temperature (T0) and Curie constant (C) were also determined on the basis of the dielectric measurements results. The analysis of temperature changes in DC conductivity revealed presence of the positive temperature coefficient of resistivity (PTCR) effect in the phase transition area. |
| Databáze: | OpenAIRE |
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