Synthesis, characterization, and applications of lanthanide ortho ferrites

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-06-16 DOI:10.3233/mgc-220072
L. Sakaya Sheela, B. Anna Benedict, B. Jebasingh, V. Manickam, J. Sumathi
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Abstract

In our current study, we demonstrate that lanthanum and yttrium ortho ferrites can be synthesized using a combustion process called self-propagating, high-temperature synthesis (SHS) using lanthanum(III) oxide and yttrium(III)oxide, chromium oxide, Iron metal, and potassium perchlorate as raw materials. Synthesized lanthanide and yttrium orthoferrites were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and thermogravimetric differential scanning calorimetry techniques. The results show that the synthesized orthoferrites are of high quality with particle sizes less than 100 nm and showing less agglomeration. Synthesized lanthanum and yttrium orthoferrites exhibited electrical conductivities around 50 kHz for different temperatures ranging from 35 to 500°C. The rise in conductivity is found to be linear with an increase in temperature. Herein, our work paves way for low-cost, large-scale production of lanthanide orthoferrites without the need for reaction solvents, which greatly opens up the scope for combustion-based synthesis approaches.
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镧系铁氧化物的合成、表征及应用
在我们目前的研究中,我们证明了镧和钇的正位铁氧体可以用一种称为自传播的燃烧过程合成,高温合成(SHS),以镧(III)氧化物和钇(III)氧化物、氧化铬、铁金属和高氯酸钾为原料。采用x射线衍射、扫描电镜、能量色散x射线能谱和热重差示扫描量热技术对合成的镧系和钇系正铁氧体进行了表征。结果表明,所合成的正铁氧体具有良好的质量,粒径小于100 nm,团聚现象较少。合成的镧和钇正铁氧体在35 ~ 500℃的不同温度下的电导率在50 kHz左右。人们发现电导率的上升与温度的升高成线性关系。在此,我们的工作为低成本、大规模生产镧系正铁氧体铺平了道路,而不需要反应溶剂,这极大地开辟了基于燃烧的合成方法的范围。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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