95331 20230914083303.0 doi 10.1016/j.jmat.2020.05.003 sideral 119080 ART-2020-119080 eng Özçelik, B. High speed processing of NiFe2O4 spinel using a laser furnace 2020 Access copy available to the general public Unrestricted The Laser Furnace (LF) method has been applied to directionally solidify NiFe2O4 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 1580 °C at its outer surface layer. This process was carried out inside a continuous roller furnace at a maximum volume temperature of 1000 °C. 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. info:eu-repo/grantAgreement/ES/DGA-FEDER/T54-17R info:eu-repo/grantAgreement/ES/MINECO/ENE2017-83669-C4-1-R info:eu-repo/grantAgreement/ES/MINECO/MAT2016-79866-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 6.425 2020 CHEMISTRY, PHYSICAL 40 / 162 = 0.247 2020 Q1 T1 PHYSICS, APPLIED 32 / 160 = 0.2 2020 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 80 / 333 = 0.24 2020 Q1 T1 1.697 2020 Electronic, Optical and Magnetic Materials 2020 Q1 Surfaces, Coatings and Films 2020 Q1 Metals and Alloys 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Özçelik, S. Amaveda, H. Universidad de Zaragoza (orcid)0000-0003-2212-447X Santos, H. Borrell, C.J. Universidad de Zaragoza Sáez-Puche, R. de la Fuente, G.F. Universidad de Zaragoza (orcid)0000-0002-0500-1745 Angurel, L.A. Universidad de Zaragoza (orcid)0000-0001-5685-2366 5001 X Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Proy. investigación DFA 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 6, 4 (2020), 661-670 Journal of Materiomics 2352-8486 3926169 http://zaguan.unizar.es/record/95331/files/texto_completo.pdf Versión publicada 56614 http://zaguan.unizar.es/record/95331/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:95331 articulos driver 2023-09-13-10:55:01 ARTICLE