High-temperature Impedance and Dielectric Studies of Ni0.5Zn0.5WO4 Micro Stone Prepared Via Solid-state Route

Abstract

The Ni0.5Zn0.5WO4 microtone was prepared via conventional solid-state synthesis techniques and its phase formation with monoclinic structure (space group- P2/c) was investigated with a view to understand its structural, morphological and dielectric properties. The phase formation and average particle size (31.38 μm) were ascertained by X-ray Diffractometry (XRD) and Field emission Scanning Electron Microscope (FESEM) techniques respectively. The real and imaginary impedance Z', Z^'', dielectric constant (𝟄r), loss (δ) and ac conductivity (σac) was measured in the frequency range 100Hz-1MHz with high-temperature evolution (200° c-460° c).The dominancy of electrode ceramic effect and Non-Debye type dipolar relaxation was observed with high temperature evolution above 2000c.The dielectric constant and loses was enhances with increase of temperature and ac conductivity was fitted with well-known Jonscher power law with dc activation energy 0.834 eV.