Eletrodeposição De Filmes De Cromo Negro Em Substratos De Cobre Para Absorção Solar

Medeiros, Ithyara; Neto, José Fernando Silva; Leite, Kerolayne Santos; Silva, Aline; Gomes, Kelly Cristiane

doi:10.18677/encibio_2017b115

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The study of renewable sources of energy has become extremely relevant ahead of the growing world demand for energy 1 . Among these sources, solar energy stands out.…”

Section: Introductionmentioning

confidence: 99%

Selective Solar Surface Solar Based on Black Chromium: Influence of Electrodeposition Parameters in the Absorption of Surfaces

et al. 2019

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The search for the reduction of costs for the implementation of renewable energies implies in the optimization of the parameters of the manufacturing processes of consolidated technologies. Among these technologies are the solar collectors composed of absorber films characterized by high absorption in the spectrum range corresponding to solar radiation and low emittance in the infrared range, allowing an increase in the collector's operating temperature (300 to 700°C). The present work produced selective surfaces based on black chrome absorber films on stainless steel substrate by electrodeposition. The substrates were immersed in a chromium trioxide bath with hexafluorosilicic acid using a Pb-Sn electrode. In the project some parameters of deposition were evaluated (time, distance and voltage) and their influence on the surface roughness of the coatings obtained by correlating them with the absorptions of the produced surfaces. For this, the surfaces produced were characterized by UV-Vis-NIR, profilometry and SEM. The results indicate that the working distance directly influenced the increase of the films absorption and that the influence of the surface roughness on the film absorption is related to the electrodeposition time as the voltage is raised.

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“…The study of renewable sources of energy has become extremely relevant ahead of the growing world demand for energy 1 . Among these sources, solar energy stands out.…”

Section: Introductionmentioning

confidence: 99%

Selective Solar Surface Solar Based on Black Chromium: Influence of Electrodeposition Parameters in the Absorption of Surfaces

et al. 2019

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“…No processo de eletrodeposição, foi utilizada uma tensão de alimentação de 5V, uma distância de 5 cm entre os eletrodos e um tempo de eletrodeposição de cinco minutos. Esses valores foram selecionados de acordo com os melhores resultados obtidos por Medeiros et al(2017b). Foram eletrodepositadas um total de três amostras idênticas que foram numeradas de 1 a 3.…”

Section: Obtenção Das Superfíciesunclassified

Efeitos Do Pós-Tratamento Térmico Em Superfícies Seletivas À Base De Óxidos De Cromo Obtidas Pelo Processo De Eletrodeposição

Gonçalves¹,

Medeiros²,

Gomes³

et al. 2019

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“…Most of the energy used by humanity comes from fossil fuels, and the use of such energies, on a large scale, has considerably changed the environmental conditions of the planet. The study of renewable sources of energy has become extremely relevant ahead of the growing world demand for energy (Medeiros et al, 2017). Among these sources, solar energy stands out.…”

Section: Introductionmentioning

confidence: 99%

Potential of Ilmenite as a Solar Absorber

Sousa

Gomes

Júnior

et al. 2020

RETERM

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Titanium is considered the fourth most widely used material in industry worldwide. Titanium minerals are currently being applied in various branches of industry, mainly in the field of pigmentation. Ilmenite (FeTiO3) is an iron and titanium oxide of more common and abundant occurrence, with theoretical composition of Fe (36.8%), Ti (31.6%) and O (31.6%). Having regard to the potential of titanium minerals and the abundance of ilmenite, together with the importance of validating direct applications of this ore, since the processing of titanium is still complex and expensive, it is necessary to study this mineral and the knowledge of its main characteristics. This work brings thermal, chemical and mineralogical characterizations of ilmenite, in order to know the potential of application of this ore as a solar absorbing material. The characterization techniques used were: X-ray diffraction (XRD) and Rietveld refinement for phase quantification, X-ray fluorescence (XRF), optical spectroscopy in the middle infrared region with Fourier Transformation by Transmittance (FTIR) and thermogravimetric thermal analysis (TGA). The analyzed sample obtained X-ray diffractogram, ilmenite (80.6%) and rutile (19.4%) as significant phases, corroborating the FRX results that indicated greater presence of Fe and titanium oxide in the ilmenite chemical composition under study. The TGA, DTA and DSC analyses indicated good thermal stability of the material in medium and high temperatures. The integration of the obtained data shows that the application of this ore as a precursor material of absorber films for selective purposes is considerable.

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Eletrodeposição De Filmes De Cromo Negro Em Substratos De Cobre Para Absorção Solar

Cited by 4 publications

References 9 publications

Selective Solar Surface Solar Based on Black Chromium: Influence of Electrodeposition Parameters in the Absorption of Surfaces

Selective Solar Surface Solar Based on Black Chromium: Influence of Electrodeposition Parameters in the Absorption of Surfaces

Efeitos Do Pós-Tratamento Térmico Em Superfícies Seletivas À Base De Óxidos De Cromo Obtidas Pelo Processo De Eletrodeposição

Potential of Ilmenite as a Solar Absorber

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