High speed processing of NiFe_(2)O_(4) spinel using a laser furnace
作者机构：Cukurova UniversityFaculty of Sciences and LettersPhysics Department01330AdanaTurkey Hakkari UniversityEngineering FacultyFood Engineering Department30000HakkariTurkey ICMA(CSIC-University of Zaragoza)María de Luna350018ZaragozaSpain Department of Inorganic ChemistryUniversity Complutense of Madrid28040MadridSpain
出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)
年 卷 期：2020年第6卷第4期
页 面：661-670页
核心收录：
学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：The authors acknowledge financial support from MINECO-AEIFEDER,EU(projects MAT2016-79866-R and ENE2017-83669-C4-1-R) SPRINT(EU H2020-FET-OPEN/0426)projects and from Gobierno de Aragon“Construyendo Europa desde Aragon”(research group T54_17R).
主 题：NiFe_(2)O_(4)spinel Laser furnace process X-ray diffraction Magnetic properties
摘 要：The Laser Furnace(LF)method has been applied to directionally solidify NiFe_(2)O_(4)spinel disks from a mixture of Fe and Ni oxides in order to obtain uniform,dense targets for controlled synthesis of spinel nanoparticles via Laser Ablation.Application of a CO2 laser in Line Scan mode onto a sample with the desired stoichiometry,enabled melt processing above 1580C at its outer surface layer.This process was carried out inside a continuous roller furnace at a maximum volume temperature of 1000C.Such combination helps avoid excessive thermal stress,crack formation and catastrophic failure of these magnetic ceramic monoliths.Higher energy incubation values yield increased molten volumes and a thicker resolidified surface layer with a dense microstructure.Despite the high solidification rates imposed,NiFe2O4 spinel is the main phase obtained according to X-Ray Diffraction(XRD)and magnetization studies.LF processed samples exhibit a reduction of the coercive fields and an increase of the saturation magnetization values,evidence for soft ferromagnetism and characteristic of the magnetic behaviour associated with this spinel.This work demonstrates the convenience of the LF method for preparation of uniform,dense targets for Laser Ablation and other evaporation based techniques used in the fabrication of nanoparticles.
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