Zang, Jiadong ; Li, Ming ; Sinclair, Derek C. ; Frömling, Till ; Jo, Wook ; Rödel, Jürgen ; Johnson, D. (2014)
Impedance Spectroscopy of (Bi1/2Na1/2)TiO3-BaTiO3Based High-Temperature Dielectrics.
In: Journal of the American Ceramic Society, 97 (9)
doi: 10.1111/jace.13012
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The dielectric properties of CaZrO3 (CZ) modified 0.94Bi1/2Na1/2TiO3 (BNT)–0.06BaTiO3 (BT) and 0.82(0.94BNT–0.06BT)–0.18(K1/2Na1/2)NbO3 have been investigated by impedance spectroscopy over a wide temperature range. The presence of a highly polarizable phase in addition to a bulk response is revealed by electric modulus (M″) spectra in both systems. The relaxation frequency of the polar phase follows the Vogel–Fulcher law below the Burns temperature which decreases with increasing CZ content. The dc conductivity of the ceramics is dominated by the bulk response which follows the Arrhenius law with an activation energy ranging from 1.4 to 1.7 eV and has an oxygen partial pressure dependence consistent with n-type semiconductivity. This information is pertinent to on-going compositional development of relaxor-based high-temperature dielectrics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Zang, Jiadong ; Li, Ming ; Sinclair, Derek C. ; Frömling, Till ; Jo, Wook ; Rödel, Jürgen ; Johnson, D. |
| Art des Eintrags: | Bibliographie |
| Titel: | Impedance Spectroscopy of (Bi1/2Na1/2)TiO3-BaTiO3Based High-Temperature Dielectrics |
| Sprache: | Englisch |
| Publikationsjahr: | September 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 97 |
| (Heft-)Nummer: | 9 |
| DOI: | 10.1111/jace.13012 |
| Kurzbeschreibung (Abstract): | The dielectric properties of CaZrO3 (CZ) modified 0.94Bi1/2Na1/2TiO3 (BNT)–0.06BaTiO3 (BT) and 0.82(0.94BNT–0.06BT)–0.18(K1/2Na1/2)NbO3 have been investigated by impedance spectroscopy over a wide temperature range. The presence of a highly polarizable phase in addition to a bulk response is revealed by electric modulus (M″) spectra in both systems. The relaxation frequency of the polar phase follows the Vogel–Fulcher law below the Burns temperature which decreases with increasing CZ content. The dc conductivity of the ceramics is dominated by the bulk response which follows the Arrhenius law with an activation energy ranging from 1.4 to 1.7 eV and has an oxygen partial pressure dependence consistent with n-type semiconductivity. This information is pertinent to on-going compositional development of relaxor-based high-temperature dielectrics. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 08 Sep 2014 09:19 |
| Letzte Änderung: | 08 Sep 2014 09:19 |
| PPN: | |
| Sponsoren: | Deutsche Forschungsgemeinschaft. Grant Number: RO 954/22, Engineering and Physical Sciences Research Council. Grant Number: EP/G005001/1 |
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