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The effect of Zn doping content in SnO2-based varistors was investigated. The general formula was ((Sn0.985Co0.01Nb0.005Oβ)1−x(ZnO)x) ; x = 0, 0.005, 0.01, 0.02 and 0.04. The powders synthesized by chemical precipitation were 4.4 – 6.1nm in crystallite size along both [110] and [101]. Only cassiterite (SnO2) phase was observed within the limit of detection of X-ray diffraction (XRD). Zn doping yielded...
Co1−xMgxFe2O4 (x = 0.00, 0.25, 0.50, 0.75 and 1.00) nanoparticles were prepared by the hydrothermal method in Aloe vera extract solution. X-ray diffraction (XRD) results indicate a pure phase of all samples with the cubic spinel ferrite structure. TEM images reveal a decrease in average particle sizes from 37.03 ± 13.17 to 9.86 ± 2.63nm with increasing Mg content. The X-ray absorption near edge structure...
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