Effect Of ZnO Nanowhiskers On The K0.5Na0.5NbO3 Thin Film Via The Hybrid Sol Gel Route

Zamri, Azzlyn Zurain (2019) Effect Of ZnO Nanowhiskers On The K0.5Na0.5NbO3 Thin Film Via The Hybrid Sol Gel Route. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The aim of this study is to analyze the effect of adding zinc oxide nano whiskers(ZnO) on potassium sodium niobate (KNN) thin film. The study was initially about piezoelectric ceramics which seems to be gaining interest among manufacturers recently.However, the main material used commonly for this component is lead zirconate titanate (PZT) and it contains toxic substances that would be harmful to both environment and health.Hence, this study suggested that KNN is one of the most suitable candidates fo replace PZT. Firstly, the precursors solution for KNN must be prepared and there will be a total of three different KNN solution which is of different ZnO powder concentration, 0.1 %, 0.3% and 0.5%. The solution is then used to coat and pyrolysis repeatedly until optimize number of coating layers achieved. Then, it undergoes annealing with optimized temperature. The sample went through X-ray Diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and four-point probe analysis. Both XRD and Raman spectroscopy are used to identify the molecule and compositional of KNN sample. SEM showed cuboidlike structure as referred in other studies and four-point probe proved that the resistivity changes in every concentration . The analysis was made to relate all the results with each other. In conclusion, it is found that 0.3% concentration of KNN is the best optimum concentration for ZnO to be added.

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