FeSiAl soft magnetic composites insulated with low melting point Na2WO4 layer

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-01 DOI:10.1016/j.materresbull.2025.113462

Shuai Yu, Zhaoyuan Liu, Hongxia Li, Jintao Lin, Xuefeng Zhang

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Abstract

To mitigate power loss of soft magnetic composites (SMCs), it is essential to form a homogeneous insulating layer and eliminate electrical conducting path between the magnetic powders. In this paper, low melting point Na₂WO₄ is evenly insulated onto FeSiAl surface, forming a core-shell FeSiAl@Na₂WO₄ structure after annealing at 730 °C. The liquid phase of Na₂WO₄ plays a pivotal role in lubrication and reduces stress concentration at the interface, resulting in low hysteresis loss. Meanwhile, the optimal Na₂WO₄ layer significantly reduces eddy current loss. Additionally, the FeSiAl@Na₂WO₄–0.08 wt. % SMC exhibits high effective permeability of 78 and low power loss of 128 mW/cm³ at 50 mT/100 kHz. This paper offers a simple and cost-effective approach for SMC preparation using low melting point salt, which contributes to the development of high-performance SMCs.

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用低熔点Na2WO4层绝缘的fesal软磁复合材料

为了降低软磁复合材料的功率损耗，必须在磁粉之间形成均匀的绝缘层并消除导电路径。本文将低熔点Na2WO4均匀绝缘于fesal表面，经730℃退火后形成核壳FeSiAl@Na2WO4结构。Na2WO4的液相在润滑中起着关键作用，减少了界面处的应力集中，导致了低的磁滞损失。同时，最优的Na2WO4层显著降低了涡流损耗。此外，FeSiAl@Na2WO4 -0.08 wt. % SMC在50 mT/100 kHz时具有78的高效磁导率和128 mW/cm3的低功耗。本文为低熔点盐制备SMC提供了一种简单、经济的方法，有助于高性能SMC的发展。

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

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.