Formation of Nickel-Zinc Ferrite Embedded in a Silica Xerogel Matrix

dc.creatorSELINA REBECA DEL CARMEN PONCE CASTAÑEDA
dc.creatorSALVADOR ANTONIO PALOMARES SANCHEZ
dc.creatorJOSE ANDRES MATUTES AQUINO
dc.date2002
dc.date.accessioned2018-11-19T14:50:04Z
dc.date.available2018-11-19T14:50:04Z
dc.identifierhttp://cimav.repositorioinstitucional.mx/jspui/handle/1004/1032
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/2262411
dc.descriptionWe report a study using X-ray diffraction, refinement Rietveld, IR absorption spectroscopy and vibrating sample magnetometry of the formation of particles of Ni-Zn ferrites embedded in a xerogel SiO2 matrix. Initial solutions were prepared mixing TEOS, distilled water, ethanol, and three different nitrates: iron, nickel and zinc. A molar ratio H2O:TEOS:Et-OH of 11.66:1.0:4.0 was used in all solutions. Formation of Ni0.5Zn0.5Fe2O4 as well as structural modifications of the SiO2 matrix induced by these particles are discussed. Ni-Zn crystals having dimensions varying from 4 to 16.5 nm have been synthesized by a suitable heat treatment schedule at temperatures varying from 700 to 1100◦C. The coercivity values for different heat-treated samples are found in the range 11–193 Oe, which are significantly larger than those presented by bulk Ni-Zn ferrites.
dc.formatapplication/pdf
dc.languageeng
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/about/cc0/
dc.subjectinfo:eu-repo/classification/Infrared spectroscopy/Sol-gel
dc.subjectinfo:eu-repo/classification/X-ray diffraction/vibrating sample magnetometry
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/22
dc.subjectinfo:eu-repo/classification/cti/2299
dc.subjectinfo:eu-repo/classification/cti/229999
dc.titleFormation of Nickel-Zinc Ferrite Embedded in a Silica Xerogel Matrix
dc.typeArtículos de revistas
dc.typeinfo:eu-repo/semantics/submittedVersion


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