{"title":"Preparation and Soft Magnetic Properties of FeNi@Al2O3 Composites","authors":"Shangpeng Chi, Shoujin Zhu, Yong Zhu, Shuangjiu Feng, Xiansong Liu, Qingrong Lv, Xucai Kan, Wei Sun","doi":"10.1007/s10948-023-06615-3","DOIUrl":null,"url":null,"abstract":"<div><p>High-flux ferronickel powder cores are widely used in high-frequency transformers and other fields due to their high saturation flux density and low core loss. In this paper, FeNi@Al<sub>2</sub>O<sub>3</sub> composites with varying Al<sub>2</sub>O<sub>3</sub> contents (0.0–5.0 wt.%) were prepared. Their microstructure, magnetic properties, and power losses were investigated in detail. SEM morphology indicates that Fe<sub>50</sub>Ni<sub>50</sub> magnetic powders are well coated with Al<sub>2</sub>O<sub>3</sub>. The loss analysis results show that with the increase of Al<sub>2</sub>O<sub>3</sub> concentration, the core loss <i>P</i><sub><i>cv</i></sub> first decreased and then increased, and the coating of Al<sub>2</sub>O<sub>3</sub> significantly reduced the eddy current loss of FeNi@Al<sub>2</sub>O<sub>3</sub> composites. When the content of Al<sub>2</sub>O<sub>3</sub> (1 MHz and 50 mT) is 4 wt.%, the core loss is reduced by about 75%.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"36 7-9","pages":"1703 - 1708"},"PeriodicalIF":1.6000,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Superconductivity and Novel Magnetism","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10948-023-06615-3","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 1
Abstract
High-flux ferronickel powder cores are widely used in high-frequency transformers and other fields due to their high saturation flux density and low core loss. In this paper, FeNi@Al2O3 composites with varying Al2O3 contents (0.0–5.0 wt.%) were prepared. Their microstructure, magnetic properties, and power losses were investigated in detail. SEM morphology indicates that Fe50Ni50 magnetic powders are well coated with Al2O3. The loss analysis results show that with the increase of Al2O3 concentration, the core loss Pcv first decreased and then increased, and the coating of Al2O3 significantly reduced the eddy current loss of FeNi@Al2O3 composites. When the content of Al2O3 (1 MHz and 50 mT) is 4 wt.%, the core loss is reduced by about 75%.
期刊介绍：
The Journal of Superconductivity and Novel Magnetism serves as the international forum for the most current research and ideas in these fields. This highly acclaimed journal publishes peer-reviewed original papers, conference proceedings and invited review articles that examine all aspects of the science and technology of superconductivity, including new materials, new mechanisms, basic and technological properties, new phenomena, and small- and large-scale applications. Novel magnetism, which is expanding rapidly, is also featured in the journal. The journal focuses on such areas as spintronics, magnetic semiconductors, properties of magnetic multilayers, magnetoresistive materials and structures, magnetic oxides, etc. Novel superconducting and magnetic materials are complex compounds, and the journal publishes articles related to all aspects their study, such as sample preparation, spectroscopy and transport properties as well as various applications.
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