The microstructural and optical properties of ZnMgO nanopowders synthesized by a ball-milling technique is reported. The wurtzite phase of the host ZnO is preserved up to a Mg incorporation of x = 0.10, beyond which segregation occurs at x = 0.15. The structural refinement of the powder x-ray diffraction patterns by the Rietveld method is undertaken to determine the microstructure. The compositional and structural disorder leads to a non-linear decrease of the lattice constant c with composition x. The value of the positional parameter indicates the ionic character and the distortion in the Zn–O ₄ tetrahedra. The disorder is manifested in the Raman spectra. A one-mode behaviour of the phonons is explained by modified-random-element-isodisplacement model. The frequency shifts of the first-order longitudinal-optic and E ₂ (low) Raman modes can be used as protocols for estimating the Mg composition in the alloy. A blue-shift of the bandgap is observed from UV-VIS and photoluminescence spectroscopies.

报道了通过球磨技术合成的ZnMgO纳米粉的微观结构和光学性质。基质ZnO的纤锌矿相被保留到x = 0.10的Mg掺入，超过x = 0.15时发生偏析。通过Rietveld方法对粉末X射线衍射图进行结构细化以确定微观结构。成分和结构无序导致成分x的晶格常数c非线性降低。位置参数的值表示Zn–O _4中的离子特性和畸变四面体。该疾病表现在拉曼光谱中。声子的单模行为由修正的随机元素等位移模型解释。一阶纵向光学和E ₂（低）拉曼模式的频移可以用作估算合金中Mg组成的协议。从UV-VIS和光致发光光谱学观察到带隙的蓝移。