Cheon, Chae II ; Choi, Jin Hong ; Kim, Jeong Seog ; Zang, Jiadong ; Frömling, Till ; Rödel, Jürgen ; Jo, Wook (2016)
Role of (Bi1/2K1/2)TiO3 in the dielectric relaxations of BiFeO3-(Bi1/2K1/2)TiO3 ceramics.
In: Journal of Applied Physics, 119 (15)
doi: 10.1063/1.4946844
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Temperature-dependent dielectric relaxations of (1-x)BiFeO3-x(Bi1/2K1/2)TiO3 (BF-BKT) lead-free piezoceramics (0.4<x<0.8) were investigated via impedance spectroscopic techniques. Regardless of the compositions, the dielectric maximum temperatures exhibit a frequency-dependent dispersion,originating from a Debye relaxation due to the presence of oxygen vacancies. It was also observed that there exist local dielectric maxima due to the relaxation of polar nanoregions as a shoulder on the lower temperature side. The onset temperature for the Debye-type relaxation decreased with decreasing BKT content, gradually overlapping with the low-temperature dielectric dispersion from the relaxation of polar nanoregions. It is proposed that the role of BKT in the BF-BKT system is toenhance the random fields that favor a relaxor state and to suppress the Debye-type relaxation of oxygen vacancy related dipoles. Published by AIP Publishing.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Cheon, Chae II ; Choi, Jin Hong ; Kim, Jeong Seog ; Zang, Jiadong ; Frömling, Till ; Rödel, Jürgen ; Jo, Wook |
| Art des Eintrags: | Bibliographie |
| Titel: | Role of (Bi1/2K1/2)TiO3 in the dielectric relaxations of BiFeO3-(Bi1/2K1/2)TiO3 ceramics |
| Sprache: | Englisch |
| Publikationsjahr: | 19 April 2016 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 119 |
| (Heft-)Nummer: | 15 |
| DOI: | 10.1063/1.4946844 |
| Kurzbeschreibung (Abstract): | Temperature-dependent dielectric relaxations of (1-x)BiFeO3-x(Bi1/2K1/2)TiO3 (BF-BKT) lead-free piezoceramics (0.4<x<0.8) were investigated via impedance spectroscopic techniques. Regardless of the compositions, the dielectric maximum temperatures exhibit a frequency-dependent dispersion,originating from a Debye relaxation due to the presence of oxygen vacancies. It was also observed that there exist local dielectric maxima due to the relaxation of polar nanoregions as a shoulder on the lower temperature side. The onset temperature for the Debye-type relaxation decreased with decreasing BKT content, gradually overlapping with the low-temperature dielectric dispersion from the relaxation of polar nanoregions. It is proposed that the role of BKT in the BF-BKT system is toenhance the random fields that favor a relaxor state and to suppress the Debye-type relaxation of oxygen vacancy related dipoles. Published by AIP Publishing. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 22 Apr 2016 06:17 |
| Letzte Änderung: | 22 Apr 2016 06:17 |
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