Effect of Na on the structural and electrical properties of lead-free sodium potassium niobate ceramics

作者: Seema Sharma , Suman Kumari , Radheshyam Rai , Dhananjay K Sharma

DOI: 10.1080/10584587.2016.1159536

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摘要: AbstractK1-xNaxNbO3 (where x = 0.48, 0.53, 0.56 and 0.60) (KNN) perovskite structured ferroelectric ceramics were prepared by the solid-state reaction method. X-ray diffraction patterns indicate that single orthorhombic phase was formed for KNN. Dielectric anomalies around 200°C 370°C identified as ferroelectric-ferroelectric ferroelectric-paraelectric transition temperatures KNN compound. The electrical behavior of studied help impedance spectroscopy technique in different temperature range. response could be resolved into a contribution, associated with bulk/grain. conductivity studies confirm activation energies are strongly frequency dependent. A decreasing trend Z′ rise suggests presence negative coefficient resistance (NTCR) material low region but tends to merge high at almost all temperatures.

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