Abstract In this paper, we report synthesis, structural, microstructure and electrical study of Mn3O4. Manganese oxide in the form of Mn3O4 was prepared by co-precipitation technique using manganese nitrate as source at the calcination temperature of 400 °C. The crystal structure has been refined by least squire fitting method using powder X-ray diffraction data. The structure refinement showed the formation of single phase with no any secondary phases. The lattice parameter and cell volume has been calculated manually from standard equations and verified by UNITCELL software program. The particle size was also determined from the XRD pattern using Scherrer’s equation. The microstructure of calcined and sintered sample was characterized by scanning electron microscopy. The temperature dependent dc conductivity of the Mn3O4 pellet was studied in the temperature range between room temperature to 500 °C. The conductivity of this spinal was very less at room temperature and increased with increasing temperature exhibiting negative temperature of coefficient of resistance behavior with activation energy 0.91eV.

中文翻译：

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纳米晶Mn3O4的结构和电学研究

摘要 在本文中，我们报告了 Mn3O4 的合成、结构、微观结构和电学研究。以硝酸锰为原料，在 400 °C 的煅烧温度下，通过共沉淀技术制备了 Mn3O4 形式的氧化锰。晶体结构已经通过使用粉末 X 射线衍射数据的最小拟合法进行了细化。结构精修表明形成单相，没有任何第二相。晶格参数和单元体积由标准方程手动计算，并通过 UNITCELL 软件程序验证。粒度也使用谢乐方程从 XRD 图中确定。通过扫描电子显微镜表征煅烧和烧结样品的微观结构。在室温至 500 °C 的温度范围内研究了 Mn3O4 颗粒的温度依赖性直流电导率。该脊柱的电导率在室温下非常低，并随着温度升高而增加，表现出电阻行为系数的负温度，活化能为 0.91eV。