不同成分比例对SrFe<SUB>12</SUB> 0 <SUB>19</SUB>/CoFe<SUB>2</SUB> 0 <SUB>4</SUB>纳米复合磁体

IF 0.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Magnetics Pub Date : 2023-09-30 DOI:10.4283/jmag.2023.28.3.251
Novrita Idayanti, De di, Dadang Mulyadi, Tony Kristiantoro, Nanang Sudrajat, Gandi Sugandi, Azwar Manaf
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引用次数: 0

摘要

本研究旨在考察不同组成比例对锶铁氧体(SrFeSUB12/SUBOSUB19/SUB)/钴铁氧体(CoFe2O4)纳米复合磁体交换弹簧效应的影响。采用机械合金化和高功率超声辐照法制备了六方硬相SrFeSUB12/SUBOSUB19/SUB和尖晶石软相cofesubb2 /SUBOSUB4/SUB纳米颗粒。将软硬颗粒的组成按比例称重,并在Qsonica型声纳器下以20 kHz频率均质1小时。将混合粉末在5000 kg/cm2下压实,然后在1200℃下烧结,得到圆柱形颗粒状的大块复合材料样品。交换弹簧效应增强了磁性,超过了非相互作用磁性粒子的正常极限,这是由于晶粒相互作用的增强。结果表明,复合磁体的性能增强程度取决于复合磁体的组成比和显微组织。与单一SrFeSUB12/ subbosub19 /SUB相比,样品的饱和磁化强度(MSUBs/SUB)有所提高。此外,当SHF:COF质量比为85:15,编码为S80C20时,样品的矫顽力(HSUBc/SUB)和生成能最大值(BH)SUBmax/SUB值最高。观察到交换弹簧效应发生在材料中,其微观结构由磁晶各向异性和饱和磁化值较高的硬磁相和饱和磁化值较高的软磁相组成。
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Effect of Various Composition Ratios on the Exchange Spring Effect in SrFe<SUB>12</SUB>O<SUB>19</SUB>/CoFe<SUB>2</SUB>O<SUB>4</SUB> Nanocomposite Magnets
This study aims to examine the effect of various composition ratios on the exchange spring effect of strontium ferrite (SrFeSUB12/SUBOSUB19/SUB)/cobalt ferrite (CoFe2O4) nanocomposite magnets. Nanoparticles of hexagonal hard phase SrFeSUB12/SUBOSUB19/SUB and spinel soft phase CoFeSUB2/SUBOSUB4/SUB were each prepared through mechanical alloying and high-power ultrasonic irradiation processes. Furthermore, the constituent of the hard-soft particles was weighed based on its ratios and the mixture was homogenized under a sonicator-type Qsonica at a frequency of 20 kHz for an hour. The bulk composite samples were obtained in cylindrical pellets form through compaction of mixture powders at 5000 kg/cm2, followed by sintering at 1200 °C. The exchange spring effect enhanced the magnetic properties, surpassing the normal limit for non-interacting magnetic particles due to enhanced grain interactions. The results showed that the degree of property enhancement depended on the various composition ratios and microstructure of the composite magnets. The magnetization of saturation (MSUBs/SUB) of the samples increased compared to a single SrFeSUB12/SUBOSUB19/SUB. Furthermore, the highest coercivity (HSUBc/SUB) and product energy maximum (BH)SUBmax/SUB values were observed in the sample which had mass ratios of SHF:COF of 85:15 with coded S80C20. The occurrence of exchange spring effects was observed in material characterized by a microstructure consisting of a hard-magnetic phase with elevated magnetocrystalline anisotropy and saturation magnetization values, along with a soft magnetic phase exhibiting high saturation magnetization value.
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来源期刊
Journal of Magnetics
Journal of Magnetics MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED
CiteScore
1.00
自引率
20.00%
发文量
44
审稿时长
2.3 months
期刊介绍: The JOURNAL OF MAGNETICS provides a forum for the discussion of original papers covering the magnetic theory, magnetic materials and their properties, magnetic recording materials and technology, spin electronics, and measurements and applications. The journal covers research papers, review letters, and notes.
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