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conferenceseries
.com
Volume 6
Research & Reviews: Journal of Material Sciences
MatSciEngg 2018
October 15-17, 2018
October 15-17, 2018 Helsinki, Finland
31
st
Materials Science and Engineering
Conference: Advancement & Innovations
Microstructural development in nanoferrites
Antonio Barba, Carolina Juan Carlos Jarque, Juan#Clausell-Terol Fonfría
Chemical Engineering Department. Jaume I University of Castellón, SPAIN
Luis Nuño-Fernández, Communications Department, Polytechnic University of Valencia, SPAIN
Chemical Engineering Department. Jaume I University of Castellón, SPAIN
P
hysical properties of advanced ceramics, as soft ferrites, are strongly dependent on
its microstructure. Usually, final microstructure for advanced sintered materials
requires high relative density (porosity close to zero), small average grain size and
narrowgrain size distribution in order to get good final physical properties.This paper
shows the relationships between these microstructural variables (relative density and
average grain size) and process parameters (compaction process parameter, as for
instance pressing pressure, and thermal cycle, including sintering temperature and
dwell time), using a nanoparticulated ferrite as rawmaterial. NANO powder has been
obtained by high-energy milling of ferrite industrial pellets. Sintered microstructure
has been observed by Scanning Electron Microscopy (SEM), obtaining the average
grain size by image analysis of the SEM micrographs. Relative density was determined by the Archimedes method, using true
density material value. The relationships that have been founded between both microstructural variables (average grain size
and relative density) have a similar mathematical form than the ones shown in literature when a microparticulated ferrite
powder is used. The main conclusion is that NANO particulated ferrites allowed to obtain sintered bodies with a higher relative
density and lower grain growth than the ones obtained fromMICRO particulated ferrites, which may have a straight influence
on final physical properties, probably enhancing them, as has been observed in sintered bodies from MICRO powders.
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
Antonio Barba has done PhD in Chemistry and Full Professor of Chemical Engineering at the Jaume I University of Castellón (UJI). His research is focused on the
application of the chemical engineering principles to the ceramic materials production processes, which is developed in the Chemical Engineering Department since
1986. He has collaborated in more than 90 research projects, funded both by public agencies and by private companies. The results of research are published in
6 books and more than 100 scientific papers.
barba@uji.esAntonio Barba et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C5-027