Dippong Thomas, Levei Erika Andrea, Deac Iosif Grigore, Lazar Mihaela Diana, Cadar Oana
Faculty of Science, Technical University of Cluj-Napoca, 76 Victoriei Street, 430122 Baia Mare, Romania.
INCDO-INOE 2000, Research Institute for Analytical Instrumentation, 67 Donath Street, 400293 Cluj-Napoca, Romania.
Nanomaterials (Basel). 2023 Jan 28;13(3):527. doi: 10.3390/nano13030527.
(CoZnNiFeO)(SiO) samples obtained by embedding CoZnNiFeO nanoparticles in SiO in various proportions were synthesized by sol-gel process and characterized using thermal analysis, Fourier-transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, inductively coupled plasma optical emission spectrometry, and magnetic measurements. Poorly crystalline Co-Zn-Ni ferrite at low annealing temperatures (500 °C) and highly crystalline Co-Zn-Ni ferrite together with traces of crystalline FeSiO (800 °C) and SiO (tridymite and cristobalite) (1200 °C) were obtained. At 1200 °C, large spherical particles with size increasing with the ferrite content (36-120 nm) were obtained. Specific surface area increased with the SiO content and decreased with the annealing temperature above 500 °C. Magnetic properties were enhanced with the increase in ferrite content and annealing temperature.
通过溶胶 - 凝胶法合成了将CoZnNiFeO纳米颗粒以不同比例嵌入SiO₂中的(CoZnNiFeO)(SiO₂)样品，并使用热分析、傅里叶变换红外光谱、X射线衍射、透射电子显微镜、电感耦合等离子体发射光谱和磁性测量对其进行了表征。在低退火温度（500°C）下获得了结晶性较差的Co-Zn-Ni铁氧体，以及在800°C时获得了高度结晶的Co-Zn-Ni铁氧体和痕量结晶FeSiO₄，在1200°C时获得了SiO₂（鳞石英和方石英）。在1200°C时，获得了尺寸随铁氧体含量增加（36 - 120 nm）的大球形颗粒。比表面积随SiO₂含量增加而增加，在退火温度高于500°C时随退火温度降低。磁性随铁氧体含量和退火温度的增加而增强。
