采用高压高温合成方法制备出锰镍复合氧化物半导体纳米块体材料。用X射线衍射（XRD），高分辨电子显微镜（HTEM）表征纳米块体材料的结构。用恒压源测定室温下电流－电压曲线（零功率）。实验结果表明：纳米固体材料微观结构存在长程有序的晶粒结构与界面无序态的结构。纳米固体材料的电学特性与材料的微观结构有关。 Mn-Ni composite oxide semiconductor nanoliths were prepared by high-pressure and high-temperature synthesis. The structure of the nanoblock material was characterized by X-ray diffraction (XRD) and high-resolution electron microscopy (HTEM). Measure the current-voltage curve (zero power) at room temperature with a constant voltage source. The experimental results show that there is a long-range ordered crystal structure and disordered interface structure in the microstructure of nanostructured solid materials. The electrical properties of the nanosolid material are related to the microstructure of the material.