Seo, In-Tae ; Steiner, Sebastian ; Frömling, Till (2017)
The effect of A site non-stoichiometry on 0.94(NayBix)TiO3-0.06BaTiO3.
In: Journal of the European Ceramic Society, 37
doi: 10.1016/j.jeurceramsoc.2016.11.045
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A good knowledge of the defect chemistry of a lead free piezoelectric ceramic enables the control of electromechanical properties and microstructure. Especially for (NayBix)TiO3, it was already shown that certain acceptor doping and Bi deficiency lead to vastly increased oxygen ionic conductivity rendering it unsuitable for piezoelectric applications. In this work, the focus is on the more relevant 0.94(NayBix)TiO3-0.06BaTiO3 (NyBxT-BT) solid solution. There is an increase in conductivity due to Bi deficiency but it is by far not as extensive as for pure NBT. While Bi deficiency leads to a dominating ionic contribution for NBT material, electronic conductivity can still be dominant for NBT-BT. However, not only the conductivity or dielectric loss is influenced by the presence of defects, but also the grain growth and piezoelectric constants. Hence, the control of the stoichiometry is very important and offers a new way to modify the piezoelectric response.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Seo, In-Tae ; Steiner, Sebastian ; Frömling, Till |
| Art des Eintrags: | Bibliographie |
| Titel: | The effect of A site non-stoichiometry on 0.94(NayBix)TiO3-0.06BaTiO3 |
| Sprache: | Englisch |
| Publikationsjahr: | 20 Januar 2017 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 37 |
| DOI: | 10.1016/j.jeurceramsoc.2016.11.045 |
| Kurzbeschreibung (Abstract): | A good knowledge of the defect chemistry of a lead free piezoelectric ceramic enables the control of electromechanical properties and microstructure. Especially for (NayBix)TiO3, it was already shown that certain acceptor doping and Bi deficiency lead to vastly increased oxygen ionic conductivity rendering it unsuitable for piezoelectric applications. In this work, the focus is on the more relevant 0.94(NayBix)TiO3-0.06BaTiO3 (NyBxT-BT) solid solution. There is an increase in conductivity due to Bi deficiency but it is by far not as extensive as for pure NBT. While Bi deficiency leads to a dominating ionic contribution for NBT material, electronic conductivity can still be dominant for NBT-BT. However, not only the conductivity or dielectric loss is influenced by the presence of defects, but also the grain growth and piezoelectric constants. Hence, the control of the stoichiometry is very important and offers a new way to modify the piezoelectric response. |
| Freie Schlagworte: | Piezoelectric; Lead-free; A site non-stoichiometry; Conductivity; NBT-BT |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 23 Jan 2017 07:09 |
| Letzte Änderung: | 23 Jan 2017 07:09 |
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