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Synthesis and Characterization of (Na0.5K0.5)NbO3 (NKN) Thin Films Formed by a Diol-based Sol-gel Process

Wiegand, Sebastian ; Flege, Stefan ; Baake, Olaf ; Ensinger, Wolfgang (2012)
Synthesis and Characterization of (Na0.5K0.5)NbO3 (NKN) Thin Films Formed by a Diol-based Sol-gel Process.
In: Journal of Materials Science & Technology, 28 (6)
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Lead-free (Na0.5K0.5)NbO3 (NKN) thin films were fabricated by spin coating on Pt/Ti/SiO2/Si substrates by a diol-based sol-gel process. Na-acetate, K-acetate, Nb-pentaethoxide and 1,3 propanediol were used to prepare the NKN precursor solution. Thermal analysis showed two characteristic temperatures of 360 and 600 °C. Based on these temperatures, a heat treatment program with pyrolysis at 360 °C and calcination at 600 °C after every layer was used. To avoid inhomogeneities and secondary phases, an excess of sodium and potassium was necessary. To evaluate the proper excess amount of sodium and potassium secondary ion mass spectrometry (SIMS) lateral element maps and X-ray diffraction (XRD) patterns were recorded. An excess amount of 20% led to homogeneous distribution of the elements and to single phase perovskite NKN films with random crystal orientation. Scanning electron microscopy (SEM) images showed a pore free surface with 100 nm grains. The leakage current measurements showed a current of 1x10-3 A/cm2 at 150 kV/cm.

Typ des Eintrags: Artikel
Erschienen: 2012
Autor(en): Wiegand, Sebastian ; Flege, Stefan ; Baake, Olaf ; Ensinger, Wolfgang
Art des Eintrags: Bibliographie
Titel: Synthesis and Characterization of (Na0.5K0.5)NbO3 (NKN) Thin Films Formed by a Diol-based Sol-gel Process
Sprache: Englisch
Publikationsjahr: Juni 2012
Verlag: Elsevier Science Publishing Company
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Materials Science & Technology
Jahrgang/Volume einer Zeitschrift: 28
(Heft-)Nummer: 6
URL / URN: http://www.sciencedirect.com/science/article/pii/S1005030212...
Kurzbeschreibung (Abstract):

Lead-free (Na0.5K0.5)NbO3 (NKN) thin films were fabricated by spin coating on Pt/Ti/SiO2/Si substrates by a diol-based sol-gel process. Na-acetate, K-acetate, Nb-pentaethoxide and 1,3 propanediol were used to prepare the NKN precursor solution. Thermal analysis showed two characteristic temperatures of 360 and 600 °C. Based on these temperatures, a heat treatment program with pyrolysis at 360 °C and calcination at 600 °C after every layer was used. To avoid inhomogeneities and secondary phases, an excess of sodium and potassium was necessary. To evaluate the proper excess amount of sodium and potassium secondary ion mass spectrometry (SIMS) lateral element maps and X-ray diffraction (XRD) patterns were recorded. An excess amount of 20% led to homogeneous distribution of the elements and to single phase perovskite NKN films with random crystal orientation. Scanning electron microscopy (SEM) images showed a pore free surface with 100 nm grains. The leakage current measurements showed a current of 1x10-3 A/cm2 at 150 kV/cm.

Freie Schlagworte: (Na0.5K0.5)NbO3, Lead-free, Perovskite, Piezo material, Sol-gel process, Thin film
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 18 Jul 2012 09:48
Letzte Änderung: 05 Mär 2013 10:01
PPN:
Sponsoren: The authors gratefully acknowledge LOEWE-Zentrum AdRIA for financial support.
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