Abstract Nanocrystalline Mg-ferrites have been synthesized by sol-gel auto combustion method using citric acid as fuel agent at different Calcination temperatures (200 °C, 400 °C, 600 °C, and 800 °C). The physical properties of nano Mg-ferrite were investigated using X-ray diffraction (XRD) analysis, scanning electron microscopy, Fourier-transform infrared spectroscopy, and LCR-Hitester for structural, surface morphology, functional groups and dielectric properties respectively. The single-phase cubic spinel structure of all the samples has been confirmed by XRD. Surface morphology studies reveal that the grains are clear with well-defined grain boundaries and also found that the average grain size is maximum at 600 °C calcination temperature. The dielectric studies reveal that the maximum dielectric constant is attained a value of 46 with the minimum dielectric loss at 600 °C calcination temperature.

中文翻译：

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用于微波应用的镁铁氧体纳米粒子的物理性质研究

摘要 以柠檬酸为燃料，在不同的煅烧温度（200℃、400℃、600℃和800℃）下，采用溶胶-凝胶自燃法合成了纳米晶镁铁氧体。使用 X 射线衍射 (XRD) 分析、扫描电子显微镜、傅里叶变换红外光谱和 LCR-Hitester 分别研究了纳米 Mg-铁氧体的物理性能，包括结构、表面形貌、官能团和介电性能。所有样品的单相立方尖晶石结构均已通过 XRD 证实。表面形态研究表明，晶粒清晰，晶界清晰，还发现平均晶粒尺寸在 600 °C 煅烧温度下最大。