Structural and Microwave Dielectric Properties of Sr(1-X/2)Na(X)Nb2O6 Ferroelectric Ceramics

摘要

Strontium sodium niobate ceramics are prepared by solid state reaction method. The crystal structures of these ceramics are studied by X-ray powder diffraction method. These materials are found to crystallize in the tetragonal tungsten bronze type structure and the unit cell parameters are calculated. The microstructural features were studied using scanning electron microscope. The real and imaginary part of complex Permittivity of the sample is determined by cavity perturbation technique. It is observed that the real and imaginary part of complex Permittivity varies with frequency. The temperature coefficient of dielectric constant and resonant frequency is found to be very small.