Magnetic and magnetocaloric properties of a foam composite based on substituted La-manganite in a polyurethane matrix

Salazar-Muñoz, V.E.; Palomares-Sánchez, S.A.; Betancourt, I.; Torres-Castillo, A.A.; Velarde, J.G. Cabal; Guerrero, A. Lobo

doi:10.1016/j.jmmm.2021.168296

Cited by 7 publications

(3 citation statements)

References 39 publications

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“…Liu et al, 2004;Lu et al, 2013;Macaskie et al, 2005;Y. Pan et al, 2020;Qian et al, 2020;Saidi & Kadkhodayan, 2021;Salazar-Muñoz et al, 2021;X. Shen et al, 2011;Xiao et al, 2017;Z.…”

Section: Resultsunclassified

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Polyurethane and rare-earth materials: a review

et al. 2023

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Polyurethanes are polymers produced from polyols and isocyanates. Commonly, aiming to modify physicochemical properties of the resulting material, other chemical species can be introduced in the polymeric structure, modifying its mechanical, thermal and electronic characteristics and conferring more stability and resistance to external factors. The rare earth chemical elements, composed of lanthanides, Y and Sc, can give the materials such improved characteristics, and are still less researched when compared to other chemical elements. In the present study, a systematic search was carried out on the Web of Science platform. No studies were identified with polyurethanes and Sc, Pr, Pm, Sm, Dy and Ho, showing room for unexplored studies. Most of the articles investigated the luminescent characteristics of the chemical elements that were used, but it was also possible to notice trends in changing mechanical and thermal properties.

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“…Liu et al, 2004;Lu et al, 2013;Macaskie et al, 2005;Y. Pan et al, 2020;Qian et al, 2020;Saidi & Kadkhodayan, 2021;Salazar-Muñoz et al, 2021;X. Shen et al, 2011;Xiao et al, 2017;Z.…”

Section: Resultsunclassified

“…In addition, only one work among all the analyzed papers did not present any property, it was the composite of lanthanum chloride with PU (Gbur et al, 2013;Z. Liu et al, 2004;Macaskie et al, 2005;Salazar-Muñoz et al, 2021;Xiao et al, 2017;R. Yu et al, 2017).…”

Section: Biocompatibilitymentioning

confidence: 98%

Polyurethane and rare-earth materials: a review

et al. 2023

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“…All these functionalities may profit from the foam-type material via improved heat exchange. A first step in this direction was already published by Salazar-Munoz et al in [28], but adding the LSMO particles into the PU material itself.…”

Section: Introductionmentioning

confidence: 99%

Functional LSMO foams for magneto-caloric applications

Koblischka,

Koblischka-Veneva,

Schmauch

2024

Appl. Phys. A

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The ferromagnetic La$$_{1-x}$$ 1 - x Sr$$_{x}$$ x MnO$$_3$$ 3 (LSMO) manganites are ideal materials for magneto-caloric applications due to their high Curie temperature. Here, we prepare open-cell, porous LSMO foams starting from a commercial polyurethane (PU) foam and commercial LSMO powder with $$x = 0.3.$$ x = 0.3 . The cut PU foams are then covered by a slurry of LSMO powder mixed with PVA and water, and then, the foams are subjected to a heat-treatment with two steps at 600 $$^\circ$$ ∘ C (burn-off organic material) and 1200 $$^\circ$$ ∘ C (sintering/compacting). The resulting ceramic LSMO foams are then characterized by X-ray, SEM, electron backscatter diffraction (EBSD) orientation mapping and magnetic measurements. The foam sample consists of randomly-oriented LSMO grains with an average grain size of 188 nm, being distinctly smaller than bulk samples of the same composition, but considerably larger than LSMO nanowires prepared by electrospinning. The magnetic data reveal a high Curie temperature like the bulk samples, and an entropy change, $$-\Delta S_{\text{M}}$$ - Δ S M slightly higher than that of the bulk samples, which points to a strong influence of the LSMO grain size. Thus, the resulting LSMO foam material is well suited for magneto-caloric applications at room temperature.

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