Effect of Ni Substitution to Structure and Morphology of Ca_0.9La_0.05Bi_0.05Mn_1-xNi_xO₃ by Sol-Gel Method

Abstract

The polycrystalline Ca0.9La0.05Bi0.05Mn1-xNixO3 (x = 0.025, 0.05, 0.075) samples were synthesized by sol-gel method. All samples were calcined at 650°C for 8 hours and sintered at 900°C for 8 hours. The structural and morphological properties of the samples were measured by X-ray diffraction (XRD) and Scanning electron microscope (SEM). The rietveld refinement shows that all samples were having an orthorhombic structure with pnma space group despite having different Ni content. Furthermore, the average crystallite size decreases with Ni substituion. SEM result shows the average grain size decreases with increasing Ni substitution regardless of the same heat treatment. This result will affect other properties like electrical and magnetic properties.