Ramesh Thotakura, P. Usha, K. Ashok, N. Pavan Kumar, Sadhana K, Praveena K
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引用次数: 0
摘要
本研究的重点是通过溶胶-凝胶法合成和表征镁和铝共掺杂的 M 型六价钡铁氧体(BaMg0.4Al0.4Fe11.2O19)粉末。利用 X 射线衍射 (XRD) 和傅立叶变换红外光谱 (FTIR) 进行的结构分析证实了合成粉末的单相结构。通过场发射扫描电子显微镜(FESEM)检查了形态学特性,发现 BaMg0.4Al0.4Fe11.2O19 的颗粒形态为六角形,平均粒径约为 60 纳米。为了制备复合材料,我们使用从市场上购买的二氧化硅来制备 (1-x) BaMg0.4Al0.4Fe11.2O19+ (x) SiO2 { 其中 x = 0.0、0.1、0.3、0.5 和 0.7) 的复合材料。复合材料采用混合法制备,然后在 1000°C/90 分钟的温度下进行微波烧结。采用 FESEM 和能量色散 X 射线光谱(EDS)分析了复合材料的形态和元素组成。在 300 kHz 至 3 GHz 的频率范围内测量了复合材料随频率变化的复介电常数。磁滞(M-H)环用于分析复合材料样品的磁性能。随着二氧化硅浓度的增加,磁饱和度降低,而与纯六价铁相比,复合样品的矫顽力略有增加。随着复合材料中二氧化硅浓度的变化,矫顽力保持相对不变。
Tunable Magnetic and Dielectric properties of BaMg0.4Al0.4Fe11.2O19 and SiO2 Composites for High-Frequency Applications
This study focuses on the synthesis and characterization of Mg and Al co-doped M-type Barium hexaferrite (BaMg0.4Al0.4Fe11.2O19) powder via the sol-gel method. Structural analysis using X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) confirmed the single-phase structure of the synthesized powder. Morphological properties were examined through field emission scanning electron microscopy (FESEM), revealing hexagonal particle morphology with an average size of approximately 60 nm for BaMg0.4Al0.4Fe11.2O19. To fabricate composites, commercially purchased SiO2 was used to prepare the composites of (1–x) BaMg0.4Al0.4Fe11.2O19+ (x) SiO2 {where x = 0.0, 0.1, 0.3, 0.5 and 0.7). The composites were prepared using the mixing method followed by microwave sintered at 1000°C/90 min. FESEM and energy-dispersive X-ray spectroscopy (EDS) were employed to analyze the morphology and elemental composition of the composites. The composites ' frequency-dependent complex permittivity was measured over 300 kHz to 3 GHz. Magnetic hysteresis (M-H) loops were used to analyze the magnetic properties of composite samples. A reduction in magnetic saturation was observed with increasing SiO2 concentration, while there was a slight increase in coercivity for the composite samples compared to pure hexaferrite. Coercivity remained relatively unchanged with varying SiO2 concentrations in the composites.
期刊介绍:
The ECS Journal of Solid State Science and Technology (JSS) was launched in 2012, and publishes outstanding research covering fundamental and applied areas of solid state science and technology, including experimental and theoretical aspects of the chemistry and physics of materials and devices.
JSS has five topical interest areas:
carbon nanostructures and devices
dielectric science and materials
electronic materials and processing
electronic and photonic devices and systems
luminescence and display materials, devices and processing.