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Structural, impedance and electrical evaluation of complex perovskite: Ca(Mn1/3Ni1/3W1/3)O3
Bulletin of Materials Science ( IF 1.8 ) Pub Date : 2020-09-05 , DOI: 10.1007/s12034-020-02229-w
Minakshi Padhy , Deeptimayee Khatua , Sujit Kumar Dehury , R N P Choudhary , P Ganga Raju Achary

A complex perovskite Ca(Mn1/3Ni1/3W1/3)O3, abbreviated as CMNWO, is synthesized by adopting the solid-state ceramic procedure. The X-ray diffraction analysis of CMNWO shows that the present perovskite is acquiring a cubic crystal structure having the cell dimension of a = 3.8321 Å. The obtained cell parameter is in good agreement with the theoretical cell parameter obtained from the SPuDS-V2.19.05.14 code. The micrograph describes the uniform grain distribution in the CMNWO sample. The average crystallite size of the sample was found to be 50.98 nm, which was calculated using the Scherrer relation. The dielectric and electrical properties like dielectric constant, dissipation factor, impedance, electrical modulus and conductivity of CMNWO were studied. The activation energies were determined from the AC-conductivity data in the temperature range of 200–350°C and 360–500°C. The dielectric spectra with temperature suggest that the present CMNWO is semiconducting in nature and follows the negative temperature coefficient of resistance kind of behaviour.

中文翻译:

复合钙钛矿的结构、阻抗和电学评估:Ca(Mn1/3Ni1/3W1/3)O3

采用固态陶瓷工艺合成了复合钙钛矿Ca(Mn1/3Ni1/3W1/3)O3,简称CMNWO。CMNWO 的 X 射线衍射分析表明,目前的钙钛矿正在获得立方晶体结构,晶胞尺寸为 a = 3.8321 Å。得到的电池参数与从SPuDS-V2.19.05.14代码得到的理论电池参数吻合良好。显微照片描述了 CMNWO 样品中均匀的晶粒分布。发现样品的平均微晶尺寸为 50.98 nm,这是使用 Scherrer 关系计算的。研究了CMNWO的介电常数、损耗因数、阻抗、电模量和电导率等介电和电学特性。活化能由 200-350°C 和 360-500°C 温度范围内的交流电导率数据确定。随温度变化的介电光谱表明,目前的 CMNWO 本质上是半导体,并遵循电阻类型的负温度系数。
更新日期:2020-09-05
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