热处理温度对ε-Fe<SUB>2</SUB> 0 <SUB>3</SUB>形成的影响SiO<SUB>2</SUB>

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.2023.28.3.239
Trinh Nguyen Thi, Phuoc Cao Van, Kirakosyan Artavazd, Chanyong Hwang, Jihoon Choi, Hyojin Kim, Jong-Ryul Jeong
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引用次数: 0

摘要

由于ε-FeSUB2/SUBOSUB3/SUB具有较大的室温强压场、高频毫米波吸收以及磁介电耦合特性,因此受到了广泛的关注。研究了热处理对反胶束法和溶胶-凝胶法制备ε-FeSUB2/ subbosub3 /SUB/SiOSUB2/SUB复合材料形成的影响。在不同的温度下进行加热,以确定获得具有最大矫顽力场的ε-FeSUB2/ subbosub3 /SUB相的最佳条件。在1075℃处理的样品中,ε-FeSUB2/ subbosub3 /SUB相的比例最高,在室温下测得的矫顽力(HC)为21.57 kOe,在230 K时达到最大值23.7 kOe。样品的磁化温度(M-T)曲线的测量也揭示了ε-FeSUB2/ subbosub3 /SUB在40- 150k范围内的特征磁跃迁。用x射线粉末衍射证实了ε-FeSUB2/ subbosub3 /SUB的晶体结构。透射电子显微镜显示氧化铁纳米颗粒的广泛尺寸分布在12至22 nm之间。结果表明,ε-FeSUB2/ subbosub3 /SUB具有较高的电磁波吸收能力,适合高速无线通信应用。
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Effect of Heat-treatment Temperature on the Formation of ε-Fe<SUB>2</SUB>O<SUB>3</SUB> Nanoparticles Encapsulated by SiO<SUB>2</SUB>
ε-FeSUB2/SUBOSUB3/SUB has received attention with particular interest because of its large coercive field at room temperature, high-frequency millimeter-wave absorption, and the coupling of its magnetic and dielectric properties. This work investigated the effect of heat treatment on the formation of ε-FeSUB2/SUBOSUB3/SUB/SiOSUB2/SUB composites fabricated using reverse-micelle and sol-gel methods. The heating process was performed at various temperatures to figure out the optimal conditions for acquisition of the ε-FeSUB2/SUBOSUB3/SUB phase, which exhibits the largest coercive field among the Fe oxides. The sample treated at 1,075 °C had the highest percentage of ε-FeSUB2/SUBOSUB3/SUB phase, with a coercivity (HC) of 21.57 kOe measured at room temperature that reached a maximum of 23.7 kOe at 230 K. The measurement of the magnetization-temperature (M-T) curve for this sample also reveals the characteristic magnetic transition associated with ε-FeSUB2/SUBOSUB3/SUB within the temperature range of 40-150 K. The crystal structure of ε-FeSUB2/SUBOSUB3/SUB was confirmed using X-ray powder diffraction. Transmission electron micrographs revealed a broad size distribution of iron oxide nanoparticles ranging from 12 to 22 nm. The findings indicate that ε-FeSUB2/SUBOSUB3/SUB is a promising candidate with high electromagnetic-wave absorption capacity that is appropriate for high-speed wireless communication applications.
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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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