Effect of the concentration of magnetite on the structure, electrical and magnetic properties of a polyester resin-based composite
Journal Title: TecnoLógicas - Year 2018, Vol 21, Issue 41
Abstract
This study reports the effect of the concentration of magnetite powders (Fe3O4) on the electrical and magnetic properties of a resin-based composite of thermoset polyester. The samples were prepared by the casting method at different concentrations: 60-40, 70-30, 80-20, 90-10 and 100-0 (% in weight), where the primary phase was resin and the secondary, Fe3O4powders. The crystalline structure was studied using X-ray diffraction and surface characterization was carried out applying the scanning electron microscopy technique. The electrical response was measured by electric polarization curves as a function of the electric field; and the volumetric electrical resistivity, by an electrometer. The magnetic response was determined by magnetization curves as a function of temperature and intensity of the applied magnetic field. The structural analysis indicates that crystallinity increases as higher concentrations of Fe3O4are added to the samples. The electrical characterization of the material reveals that the volumetric resistivity decreases as the content of magnetite increases. These reactions indicate an insulation-conductor transition with increasing dielectric constant values. The magnetic characterization presents a linear increase of the saturation of magnetization and magnetic moment as a functionof the amount of magnetite added to the polymer matrix, whereas the coercivity shows behaviors of soft magnetic materials for T ˃Tv and for T < Tv, where Tv represents the temperature of Verwey.
Authors and Affiliations
Gabriel Peña-Rodríguez, Paola A. Rivera-Suárez, César H. González-Gómez, Carlos A. Parra-Vargas, Andrés O. Garzón-Posada, David A. Landínez-Téllez, Jairo Roa-Rojas
Keywords
Related Articles
- EP ID EP343118
- DOI 10.22430/22565337.708
- Views 124
- Downloads 0
Enhancement of nerve structure segmentation by a correntropy-based pre-image approach
Peripheral Nerve Blocking (PNB) is a commonly used technique forperformingregional anesthesia and managing pain. PNB comprises the administration of anestheticsin the proximity of a nerve. In...
Influence of local values on cD-optimal designs for logistic models
When experimentsare designed, it is uncommon to use criteria to determine the treatments and number of replicates that should be conducted to properly estimate the parametersin the model under study...
Performance of clustering techniques for solving multi depot vehicle routing problem
The vehicle routing problem considering multiple depots is classified as NP-hard. MDVRP determines simultaneously the routes of a set of vehicles and aims to meet a set of clients with a known demand. The objective funct...
Collaborative work as a didactic strategy for teaching/learning programming: a systematic literature review
The incorporation of Collaborative Work into programming courses has been identified as a potential strategy that could maximize student participation and have a positive impact on learning. In the...
IMU-Mouse: design and implementation of a pointing device for people with disabilities
The correct application of ICTs (information and communications technologies) to the education of people with physical disabilities requires studies aimed to adapt interfaces. Controlling the desig...