Properties of (Na, K)NbO3 and (Li, Na, K)NbO3 ceramic mixed systems

In this paper, samples of (NaxK1-x)NbO3 where x = 0.1 - 1 and Li-y(Na0.5K0.5)(1-y)NbO3 where y = 0.01 - 0.05 have been prepared by conventional ceramic technique. The prepared Sodium Potassium Niobate (NaxK1-xNbO3) and Lithium Sodium Potassium Niobate (Li-y(Na0.5K0.5)(1-y)NbO3) 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)NbO3 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.