Pure ZnO and Zn_0.95-xAl_0.05Mn_xO (x = 0, 1, 3, 5) nanoparticles (NPs) were successfully produced through co-precipitation method. The doped ZnO nanoparticles were characterized by using X-ray diffraction (XRD), Williamson-Hall plot (W–H Plot) and field emission electron microscope (FESEM) analysis. The XRD patterns revealed that all samples exhibit crystalline hexagonal (wurtzite) structure of the ZnO NPs. The change in lattice parameters (a, c), preferential crystalline orientation for Mn doped samples, change in bond length and micro-strain after doping indicate successful incorporation of Mn²⁺ in Al-doped ZnO NPs. Further, the increase in average crystallite size directed the improvement in the crystalline nature. FESEM was used to study the morphological analysis of pure and doped ZnO NPs. UV Vis spectroscopy results indicate that the optical transmission improved in the visible region and band gap decreases as a result of doping. The improvement in the dielectric loss due to Mn content doping was observed and is associated with increase in the number of defects. The decrease in ac conductivity (${\sigma }_{ac}$) with Mn content is related with increase amount of defects.

通过共沉淀法成功制备了纯ZnO和Zn _0.95-x Al _0.05 Mn _x O（x = 0、1、3、5）纳米颗粒（NPs）。掺杂的ZnO纳米颗粒通过X射线衍射（XRD），Williamson-Hall图（W–H图）和场发射电子显微镜（FESEM）分析进行表征。XRD图谱表明，所有样品均显示出ZnO NPs的晶体六方（纤锌矿）结构。晶格参数（a，c）的变化，掺杂Mn的样品的优先晶体取向，掺杂后键长和微应变的变化表明Mn ^2+的成功引入在铝掺杂的ZnO NP中。此外，平均微晶尺寸的增加指导结晶性质的改善。FESEM被用来研究纯的和掺杂的ZnO NP的形态分析。紫外可见光谱结果表明，由于掺杂，在可见光区域的光透射率提高了，并且带隙减小了。观察到由于Mn含量掺杂引起的介电损耗的改善，并且与缺陷数量的增加有关。交流电导率的降低（${\sigma }_{\mathrm{一个}C}$Mn含量与缺陷量的增加有关。