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Updated: Jun 14, 2025

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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
Published on: February 10, 2023
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伪核心外永久合金 (超级合金)@ZnFe2O4 粉末和火花等离子体烧结紧物,基于机械合金粉末
Traian Florin Marinca1, Loredana Cotojman1, Florin Popa1
1Materials Science and Engineering Department, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania.
Materials (Basel, Switzerland)
|August 29, 2024
概括
火花等离子烧结生产了由NiFe合金和Zn铁酸制成的新型软磁性复合芯. 这些芯具有较高的电阻和较低的功耗损失,使其适合高级应用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 磁力学 磁力学 是一种
背景情况:
- 软磁复合材料 (SMC) 芯对于各种电子应用至关重要.
- 开发具有增强性能的SMC,如高电阻率和低损耗,是正在进行的研究领域.
研究的目的:
- 为了合成和表征NiFe@ZnFe2O4和NiFeMo@ZnFe2O4伪核心外粉末及其烧结紧材料.
- 通过火花等离子烧结 (SPS) 生产的这些新型SMC的磁性和电性质的研究.
主要方法:
- 伪核心外粉末 (Ni3Fe@ZnFe2O4,NiFeMo@ZnFe2O4) 的火花等离子烧结 (SPS).
- 使用X射线衍射,SEM,EDS,DC/AC磁性歇斯底里测量和电阻测量进行表征.
- 对功率损失及其分解成粒子内部和粒子间组件的分析.
主要成果:
- 在600-700°C时,烧结紧材料达到高电阻率 (~7 × 10^-3 Ω·m),比烧结铁高三倍.
- 在600°C烧结的超合金/ZnFe2O4复合材料显示相对初始透性在研究频率范围内从~95降至50降.
- 观察到低功率损失,在2000 Hz时值低于1.5 W/kg,在10 kHz时降低水平,其中粒子内部损失占主导地位.
结论:
- SPS是一种有效的方法,用于从伪核粉末中生产高性能软磁性复合材料芯.
- 开发的基于NiFe的SMC提供了高电阻率和低功耗损失的有希望的组合.
- 这些发现表明,在高频电磁器件中,这些特性至关重要,其潜在应用.
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