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Effect of different calcination temperatures and post annealing on the properties of 1,3 propanediol based Sol-Gel (Na0.5K0.5)NbO3 (NKN) thin films

Wiegand, Sebastian and Flege, Stefan and Baake, Olaf and Ensinger, Wolfgang :
Effect of different calcination temperatures and post annealing on the properties of 1,3 propanediol based Sol-Gel (Na0.5K0.5)NbO3 (NKN) thin films.
[Online-Edition: http://www.sciencedirect.com/science/article/pii/S0925838812...]
In: Journal of Alloys and Compounds, 548 pp. 38-45.
[Article] , (2013)

Official URL: http://www.sciencedirect.com/science/article/pii/S0925838812...

Abstract

1,3 Propanediol based Sol-Gel (Na0.5K0.5)NbO3 (NKN) lead-free thin films were synthesized on Pt/Ti/SiO2/Si substrates. Na-acetate, K-acetate, and Nb-pentaethoxide were used as metal precursors and 1,3 propanediol as solvent. The influence of different calcination temperatures on the properties of the NKN thin films was analysed by SEM pictures, XRD, hysteresis and leakage current measurements. Low calcination temperatures led to low leakage currents over the whole electric field range. Based on these findings a calcination at low temperatures was combined with a post annealing step. In this way low leakage currents of 6 x 10-5 A/cm2 at an electric field of 150 kV/cm and 2 Pr and 2 Ec values of 26.6 µC/cm2 and 214 kV/cm, respectively, could be achieved. All films with post annealing treatment were free of pore and crack formation on the surface and crystallized in the single perovskite phase of NKN.

Item Type: Article
Erschienen: 2013
Creators: Wiegand, Sebastian and Flege, Stefan and Baake, Olaf and Ensinger, Wolfgang
Title: Effect of different calcination temperatures and post annealing on the properties of 1,3 propanediol based Sol-Gel (Na0.5K0.5)NbO3 (NKN) thin films
Language: English
Abstract:

1,3 Propanediol based Sol-Gel (Na0.5K0.5)NbO3 (NKN) lead-free thin films were synthesized on Pt/Ti/SiO2/Si substrates. Na-acetate, K-acetate, and Nb-pentaethoxide were used as metal precursors and 1,3 propanediol as solvent. The influence of different calcination temperatures on the properties of the NKN thin films was analysed by SEM pictures, XRD, hysteresis and leakage current measurements. Low calcination temperatures led to low leakage currents over the whole electric field range. Based on these findings a calcination at low temperatures was combined with a post annealing step. In this way low leakage currents of 6 x 10-5 A/cm2 at an electric field of 150 kV/cm and 2 Pr and 2 Ec values of 26.6 µC/cm2 and 214 kV/cm, respectively, could be achieved. All films with post annealing treatment were free of pore and crack formation on the surface and crystallized in the single perovskite phase of NKN.

Journal or Publication Title: Journal of Alloys and Compounds
Volume: 548
Publisher: Elsevier Science Publishing Company
Uncontrolled Keywords: Ceramics, Ferroelectrics, scanning electron microscopy, SEM, Sol-Gel processes, Thin film, X-ray diffraction
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 12 Oct 2012 11:55
Official URL: http://www.sciencedirect.com/science/article/pii/S0925838812...
Funders: The authors gratefully acknowledge the LOEWE-Zentrum AdRIA for financial support.
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