Synthesis, Structural and Dielectric Properties of Co²⁺, Ni²⁺ and Cu²⁺:Zn₂SiO₄ Nanoceramics by a Sol-gel Method

Abstract

Present work reports on the synthesis of Co²⁺, Ni²⁺ and Cu²⁺ ions doped willemite α-Zn₂SiO₄ nanoceramic sol-gel powders. The structural and morphological of these materials were carried out using XRD, Raman and field emission scanning electron microscopy (FESEM), and elemental analysis by EDAX. Both XRD and EDAX results have thus corroborated the doping of Co²⁺, Ni²⁺ and Cu²⁺ ions in Zn₂SiO₄ matrix. The dielectric constant (ϵ′), dielectric loss (ϵ^″), and AC conductivity (σ_ac) properties have been studied as a function of frequency and temperature as well and those results are found to be strongly dependent on dopant ions such trends have successfully been explained based on space charge polarization way following according the standard procedures of Maxwell-Wagner two-layer model.

Keywords:

• Sol-gel synthesis
• nano-ceramics
• nanocomposite and dielectric properties