INVESTIGADORES
BERCOFF Paula Gabriela
artículos
Título:
Thermomagnetic characterization of organic-based ferrofluids prepared with Ni ferrite nanoparticles
Autor/es:
M. ARANA; P. G. BERCOFF; S. E. JACOBO
Revista:
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2017 vol. 215 p. 1 - 8
ISSN:
0921-5107
Resumen:
In this work, a thermomagnetic characterizationof kerosene-based ferrofluids (FFs) prepared with Ni-ferrite nanoparticles(NPs) is performed by measuring their thermal conductivity and diffusivity coefficientenhancements. The particles were synthesized by high-energy ball milling, as analternative to the most commonly chosen NPs synthesis methods for FFs. Theaction of an applied magnetic field on the FF increases the thermalconductivity and diffusivity due to cooperation between the NPs, as it agglomeratesthem favoring chain-like and clusters formations. It was found that the heatcapacity of the studied FFs decreases under the application of a magneticfield. The obtained results for thermal conductivity of FFs under magneticfields were fitted by a gas-compression model that considers NPs agglomerates inthe fluid.
