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标题：Dielectric and Magnetic Properties of Cr³⁺, Mn²⁺ & Fe³⁺ Doped BiNbO₄ Ceramic Powders
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作者：Karuturi Srinivasa Rao ; Srinivasa Buddhudu
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：12
页码：18222
DOI：10.15680/IJIRSET.2014.0312003
出版社：S&S Publications
摘要：We report here on the preparation, dielectric and magnetic of Bi0.95 TM0.05NbO4 (where TM = Cr3+, Mn2+ & Fe3+)ceramic powders with a sintering temperature of 8000C through solid state reaction method. Both SEM images and EDAX elementalprofiles have been obtained to analyze their particle sizes and the chemical compositions. The XRD profiles of the samples aremeasured to understand their structure details. The dielectric properties of those samples have also been measured as function offrequency and their magnetic properties have also been studied to understand their magnetic nature. It is interesting to mention thatthe dielectric constant (ε’) and dielectric loss (tan δ) of all the samples have been found to be decreasing while ac conductivity (σac)increases as a function of frequency. The Cole-Cole plots of all the materials studied show the bulk resistance (Rb) decreasing withan increase in the crystallite sizes. The dc conductivity (σdc) results of the transition metal ions doped ceramic powders have shownthe trend in the order of Mn < Cr < Fe that are in accordance with the literature reports. The present work thus documents moreuseful and interesting results.
关键词：BiNbO4 Ceramic Powders; dielectric; conductivity and magnetic properties – Analysis.