Blömker, Martin ; Erdem, Emre ; Li, Shunyi ; Weber, Stefan ; Klein, Andreas ; Rödel, Jürgen ; Frömling, Till (2016)
Defect Structure of Doped Lead-Free 0.9(Bi0.5Na0.5)TiO3−0.1(Bi0.5K0.5)TiO3Piezoceramics.
In: Journal of the American Ceramic Society, 99 (2)
doi: 10.1111/jace.13999
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Cu- and V-doped BNKT10-based piezoelectric ceramics with up to 0.5 at.% dopant concentration were synthesized and displayed more homogeneous grain growth compared to undoped BNKT10 ceramics. The defect chemistry and defect structure, studied by X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR), indicate a slightly rhombic electronic environment with major unidirectional octahedral distortion of the local environment of Cu. The solubility limit of Cu2+ in this material system is lower than 0.05 at.% Cu; above this limit, a Cu segregation at the grain boundaries is prevalent, unlike in PZT and KNN. Here, V was shown to be incorporated into the perovskite lattice and possess oxidation states of +4 and +5, acting both as isovalent and donor dopant, predominantly compensated by A-site vacancies. A trend toward higher ceramic densities, higher maximum polarization, and higher remanent polarization with increasing Cu concentration was observed. A maximum mechanical coupling factor could be obtained in the case of doping with 0.4 at.% V and 0.1 at.% Cu with a planar coupling of 0.19 and a thickness coupling factor of 0.56.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Blömker, Martin ; Erdem, Emre ; Li, Shunyi ; Weber, Stefan ; Klein, Andreas ; Rödel, Jürgen ; Frömling, Till |
| Art des Eintrags: | Bibliographie |
| Titel: | Defect Structure of Doped Lead-Free 0.9(Bi0.5Na0.5)TiO3−0.1(Bi0.5K0.5)TiO3Piezoceramics |
| Sprache: | Deutsch |
| Publikationsjahr: | 2016 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 99 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1111/jace.13999 |
| Kurzbeschreibung (Abstract): | Cu- and V-doped BNKT10-based piezoelectric ceramics with up to 0.5 at.% dopant concentration were synthesized and displayed more homogeneous grain growth compared to undoped BNKT10 ceramics. The defect chemistry and defect structure, studied by X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR), indicate a slightly rhombic electronic environment with major unidirectional octahedral distortion of the local environment of Cu. The solubility limit of Cu2+ in this material system is lower than 0.05 at.% Cu; above this limit, a Cu segregation at the grain boundaries is prevalent, unlike in PZT and KNN. Here, V was shown to be incorporated into the perovskite lattice and possess oxidation states of +4 and +5, acting both as isovalent and donor dopant, predominantly compensated by A-site vacancies. A trend toward higher ceramic densities, higher maximum polarization, and higher remanent polarization with increasing Cu concentration was observed. A maximum mechanical coupling factor could be obtained in the case of doping with 0.4 at.% V and 0.1 at.% Cu with a planar coupling of 0.19 and a thickness coupling factor of 0.56. |
| 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 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 15 Jan 2016 16:06 |
| Letzte Änderung: | 23 Jan 2017 07:07 |
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