Structural and electrical studies of nanocrystalline Mn3O4

IF 1.3 4区物理与天体物理 Q4 PHYSICS, CONDENSED MATTER

Ferroelectrics Letters Section Pub Date : 2018-11-02 DOI:10.1080/07315171.2018.1564875

Raghavendra Sagar

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引用次数: 8

Abstract

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.

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纳米晶Mn3O4的结构与电学研究

摘要本文报道了Mn3O4的合成、结构、微观结构和电学研究。以硝酸锰为原料，在400℃的煅烧温度下，采用共沉淀法制备了Mn3O4形式的氧化锰。利用粉末x射线衍射数据，采用最小乡绅拟合方法对晶体结构进行了细化。组织细化为单相，无二次相形成。晶格参数和胞体体积由标准方程手工计算，并通过UNITCELL软件程序进行验证。利用Scherrer方程从XRD图中确定了颗粒的大小。用扫描电镜对煅烧和烧结试样的微观结构进行了表征。在室温至500℃的温度范围内，研究了Mn3O4球团的直流电导率随温度的变化。该材料的电导率在室温下非常低，随着温度的升高而升高，表现出负温度的电阻行为系数，活化能为0.91eV。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ferroelectrics Letters Section 物理-物理：凝聚态物理

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

4.8 months

期刊介绍： Ferroelectrics Letters is a separately published section of the international journal Ferroelectrics. Both sections publish theoretical, experimental and applied papers on ferroelectrics and related materials, including ferroelastics, ferroelectric ferromagnetics, electrooptics, piezoelectrics, pyroelectrics, nonlinear dielectrics, polymers and liquid crystals. Ferroelectrics Letters permits the rapid publication of important, quality, short original papers on the theory, synthesis, properties and applications of ferroelectrics and related materials.