BCMaterials Fortnightly Seminar #52: Catarina Lopes and Daniel Salazar
CATARINA LOPES
(BCMATERIALS)
THE CONTRIBUTION OF IONIC LIQUIDS IN THE DEVELOPMENT OF NANOGENERATORS
The development of low weight and flexible nanogenerators are in demand for low-power portable devices. Currently, most of the nanogenerators are based in the piezoelectric and triboelectric effects, and despite the good results obtained with these materials, there is an incessant search in the development of other possibilities. In this context, the versatility of the ionic liquids and their interaction with material surfaces, open new perspectives for the arising of new types of nanogenerators. In this presentation, some results obtained with polymer@ionic liquid composites will be presented.
DANIEL SALAZAR
(BCMATERIALS)
DEVELOPMENT OF NEW TETRAGONAL THMN12-TYPE PHASES WITH LOW RARE EARTH CONTENTS FOR PERMANENT MAGNET APPLICATIONS
In recent years, the critical supply of the raw rare earth materials, has motivated the search for rare earth-free and rare-earth-lean hard magnetic materials. Tetragonal R(Fe,M)12 compounds (R = rare earth, M = Co, Ti, Mo, Si…), with the ThMn12 phase structure, have long been of interest as permanent magnet materials with reduced R content, but some stability issues have to be overcome first. To further exploit the advantage of low R content, particular attention has been recently paid to compounds with cerium, the most abundant and least “critical” rare earth metal. Although the mixed valence state of the Ce atoms has an unfavorable effect on the Curie temperature, several substitutions for Ce in the Ce(Fe,M)12 compounds stabilizes the 1:12 structure and promote high Curie temperatures [1,2]. The alloys studied in this work have a single ThMn12 phase at several substitutions, as deduced from X-ray diffraction. High magnetization (>100 A·m2/kg), Curie temperatures >300ºC and enhanced coercivity by different substitutions, make them suitable for permanent magnet applications. To gain further knowledge of the magnetic structure and intrinsic magnetic properties of these compounds, were carried out several experiments as Mössbauer spectroscopy, Neutron and X-ray diffraction, magnetometry (VSM and SQUID) and electron microscopy. [1] A.M. Gabay, et.al. AIP Advances 6 (2016) 056015. [2] A. Martin-Cid, et.al. Phys. Status Solidi C (2016) 1-3.Related news
Senentxu Lanceros-Méndez: “Contribuimos a las revoluciones biotecnológica, de sostenibilidad y digital”
Senentxu Lanceros-Méndez es el director científico de BCMaterials desde 2018. En los seis años que lleva al frente del centro, éste ha experimentado un crecimiento exponencial en términos de...Workshop New Materials for a Better Life! 2024, el 27 de noviembre
El próximo 27 de noviembre BCMaterials realizará en su sede de Leioa una nueva edición de su workshop anual New Materials for a Better Life! Bajo el subtítulo ‘Materializing the future: fostering...Charla invitada con Marco Sangermano el 13 de noviembre
BCMaterials ofrecerá una nueva charla invitada el próximo 13 de noviembre, a cargo de Marco Sangermano, profesor pleno de Ciencia y Tecnología de Polímeros en el Politécnico de Turín (Italia) La...Congreso IMOH 2024: éxito científico y de participación
Del 15 al 17 de octubre, la sede de BCMaterials albergó la segunda edición del congreso ‘IMOH 2024, 2nd International Meeting on Challenges and Opportunities for HiCANS’, dedicado a la ciencia e...