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Volume 6 Research & Reviews: Journal of Material Sciences MatSciEngg 2018
October 15-17, 2018
October 15-17, 2018 Helsinki, Finland
31st Materials Science and Engineering
Conference: Advancement & Innovations
Nanoparticles for soft ferrites: Influence on sintered microstructure
Carolina Clausell Terol1, Antonio Barba Juan1, Juan Carlos Jarque Fonfría1, Luis Nuño-Fernández2
1Jaume I University, Spain
2Technical University of Valencia, Spain
C u-doped NiZn ferrites are typical electromagnetic wave absorbers which
absorption capacity (calculated from experimental measures of complex
permeability and complex permittivity for a given frequency range) is related
to thickness body and especially and more critical to its microstructure. Ideal
microstructure would consist of sintered bodies with no porosity, small average grain
size and narrow grain size distribution. Moreover, the finer grain sizes the better
absorption capacity. Literature shows that physical properties of ceramic bodies
improve when particle-size distribution decreases from the micro-scale to the nano-
scale. Ferrites from nanoparticles have been sintered controlling average grain size
and relative density with sintering temperature. Green microstructure has been set constant using uniaxial dry pressing at 200
MPa as the shaping method. Sintered microstructure has been observed by Scanning Electron Microscopy (SEM), obtaining
the average grain size by image analysis of the SEMmicrographs. Relative density was determined by the Archimedes method,
using true density material value. Magnetic permeability was measured in the frequency range from 1 MHz to 3 GHz by using
an Agilent model E4991 ARF impedance analyzer with the 16454A test fixture and this later parameter has been related to
average grain size and relative density. Finally, the results obtained from nano-particulate ferrite powder have been compared
with those previously obtained from micro-particulate ferrite powders, noting an improvement in performance.
Aknowledgements
The study has been partially funded by the Spanish National Plan for Scientific Research, Development, and Technology
Innovation of the Spanish Minister of Economy and Competitiveness (project MAT2016-76320-R) and the Jaume I University
of Spain (project UJI-B2017-48).
Biography
Carolina Clausell Terol has completed her PhD in Chemical Engineer in 2008 and MSc in Chemical Engineer in 1998, both from Jaume I University. She is the
Member of the Ceramic Technology research group since 1997 and since 2012, teaching and research staff at the Chemical Engineering Department of the
same university. Her research career is focused in the application of the chemical engineering principles to the ceramic materials production processes, which
she develops at the research group and the department that she belongs to. Furthermore, she is a Member of the collaborating research group chemistry of
electromagnetic radiation processed materials between the Jaume I University and the Spanish National Research Council (CSIC), through the Aragón Materials
Science Institute (ICMA). She has collaborated in 38 research projects, funded by public institutions and private companies, resulting in 2 patents, numerous
scientific articles in international journals of the ceramic materials field indexed in the journal citation report and several contributions to national and international
conferences of the same research field.
Carolina Clausell Terol et al. , Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C5-026