Synthesis and characterization of lead-doped copper ferrite nanoparticles

OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA Pub Date : 2024-07-11 DOI:10.55905/oelv22n7-137

Danúbia Bordim de Carvalho, Ronaldo Sergio de Biasi, Mattheus Torquato, Jose Brant de Campos, Suzana Bottega Peripolli, Alexander Eduardo Caytuero Villegas, André Ben-Hur da Silva Figueiredo

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Abstract

Magnetic nanoparticles of lead-doped copper ferrite, PbxCu1−xFe2O4, where x = 0.0, 0.1, and 0.2, were synthesized by the combustion method. The samples were characterized by X-ray diffraction (XRD) to determine crystallographic phases and crystallite sizes. The results showed the presence of trigonal and tetragonal phases for x = 0, with crystallite sizes of 37 nm and 72 nm, respectively, and for x = 0.2, with crystallite sizes of 23 nm and 21 nm, respectively. For x = 0.1, only the trigonal phase was observed, with a crystallite size of 27 nm. Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) showed cubic, hexagonal, and rod-shaped structures for all values of x, indicating a polycrystalline material with various spatial orientations. Energy-dispersive X-ray spectroscopy (EDS) identified the chemical elements present in the samples and Mössbauer spectroscopy revealed the formation of spinel-type ferrite. Vibrating sample magnetometry (VSM) displayed typical ferrimagnetic behavior and the Jahn-Teller effect was observed in all samples.

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掺铅铁氧体铜纳米粒子的合成与表征

采用燃烧法合成了铅掺杂铜铁氧体（PbxCu1-xFe2O4，其中 x = 0.0、0.1 和 0.2）的磁性纳米颗粒。样品通过 X 射线衍射 (XRD) 表征，以确定晶相和晶粒大小。结果表明，在 x = 0 时，存在三方和四方晶相，晶粒大小分别为 37 纳米和 72 纳米；在 x = 0.2 时，存在三方和四方晶相，晶粒大小分别为 23 纳米和 21 纳米。在 x = 0.1 时，只观察到晶体尺寸为 27 纳米的三方相。扫描电子显微镜（SEM）和透射电子显微镜（TEM）显示，在所有 x 值下都存在立方、六方和棒状结构，表明这是一种具有各种空间取向的多晶材料。能量色散 X 射线光谱（EDS）确定了样品中存在的化学元素，莫斯鲍尔光谱显示形成了尖晶石型铁素体。振动样品磁力测定法（VSM）显示了典型的铁磁行为，并在所有样品中观察到了贾恩-泰勒效应。

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