Abstract
In this paper, samples of (Na x K 1 m x )NbO 3 where x = 0.1 m 1 and Li y (Na 0.5 K 0.5 ) 1 m y NbO 3 where y = 0.01 m 0.05 have been prepared by conventional ceramic technique. The prepared Sodium Potassium Niobate (Na x K 1 m x NbO 3 ) and Lithium Sodium Potassium Niobate (Li y (Na 0.5 K 0.5 ) 1 m y NbO 3 ) samples are characterized using X-ray diffraction method and grain size have been calculated using SEM photographs; the phase transitions have been observed from DSC experiments. Finally, the piezoelectric and dielectric characteristics of these ceramic systems are also investigated. Lithium dopants in (Na, K)NbO 3 ceramics play an important role on the ferroelectric curie temperature, dielectric constant, grain size as well as the planar mechanical coupling coefficient ( k p ) value.
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