{"title":"Adjustable ferrite amount for various characteristics of Ni0.5Cd0.5Fe2O4 nanoparticles incorporated in a SiO2 matrix","authors":"Thomas Dippong, Oana Cadar","doi":"10.1111/jace.20582","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>The (Ni<sub>0.5</sub>Cd<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>)<i><sub>x</sub></i>(SiO<sub>2</sub>)<sub>100‒</sub><i><sub>x</sub></i> (<i>x</i> = 0%‒100%) samples were synthesized through sol‒gel technique followed by the study of the evolution of crystalline phases at different temperatures. For the samples containing ferrite, the X-ray diffraction indicated the development of ferrite and SiO<sub>2</sub> matrix and displayed single, low crystallized ferrite at low temperatures and well-crystallized ferrite attended by Fe<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> at high temperatures (1000°C). The crystallite size and lattice parameter increased with annealing temperature and the amount of ferrite incorporated in the SiO<sub>2</sub> matrix. The evolution of shape, size, and degree of agglomeration with the amount of ferrite incorporated in the SiO<sub>2</sub> matrix at 1000°C were investigated. The values of remanent and saturation magnetizations, anisotropy and coercivity, and the amount of ferrite incorporated in the SiO<sub>2</sub> matrix after annealing at 700°C and 1000°C were correlated with the particle morphology. The SiO<sub>2</sub> matrix exhibited diamagnetic behavior, while the Ni<sub>0.5</sub>Cd<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> incorporated in the SiO<sub>2</sub> matrix showed a superparamagnetic behavior. The amount of ferrite and annealing temperature impacts the particle sizes, which further affects the magnetic characteristics. The incorporation of Ni<sub>0.5</sub>Cd<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> nanoparticles into the inert SiO<sub>2</sub> matrix enabled the control of particle size, minimized particle agglomeration, and enhanced the magnetic properties.</p>\n </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 8","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the American Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jace.20582","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
The (Ni0.5Cd0.5Fe2O4)x(SiO2)100‒x (x = 0%‒100%) samples were synthesized through sol‒gel technique followed by the study of the evolution of crystalline phases at different temperatures. For the samples containing ferrite, the X-ray diffraction indicated the development of ferrite and SiO2 matrix and displayed single, low crystallized ferrite at low temperatures and well-crystallized ferrite attended by Fe2O3 and SiO2 at high temperatures (1000°C). The crystallite size and lattice parameter increased with annealing temperature and the amount of ferrite incorporated in the SiO2 matrix. The evolution of shape, size, and degree of agglomeration with the amount of ferrite incorporated in the SiO2 matrix at 1000°C were investigated. The values of remanent and saturation magnetizations, anisotropy and coercivity, and the amount of ferrite incorporated in the SiO2 matrix after annealing at 700°C and 1000°C were correlated with the particle morphology. The SiO2 matrix exhibited diamagnetic behavior, while the Ni0.5Cd0.5Fe2O4 incorporated in the SiO2 matrix showed a superparamagnetic behavior. The amount of ferrite and annealing temperature impacts the particle sizes, which further affects the magnetic characteristics. The incorporation of Ni0.5Cd0.5Fe2O4 nanoparticles into the inert SiO2 matrix enabled the control of particle size, minimized particle agglomeration, and enhanced the magnetic properties.
期刊介绍：
The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials.
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