Effect of Li doping on dielectric properties of Na_1−xK_xNbO_3, x = 0.500, morphotropic phase region

Abstract

Li doped sodium-potassium niobate (Na_0.5K_0.5)_1-yLi_yNbO₃ ceramic pellets, with y = 0 to 7 (mole) %, were prepared by solid state reaction method with double sintering. With varying lithium content (y), dielectric properties, and X-ray diffraction (XRD) peaks shifting pattern exhibit strong compositional dependence. Among the prepared Composition, a break in XRD peaks shifting tendency, and maximum dielectric constant, electric conductivity were obsreved at the composition with y = 0.06.

Keywords:

• Ferroelectric
• perovskite
• dielectric properties
• morphotropic phase transition