16 documents found, page 1 of 2
Structural and Optical Characterization of Mechanochemically Synthesized CuSbS2...
Esperto, Luís; Figueira, Isabel; Mascarenhas, João; Silva, Teresa; Correia, J.B.; Neves, FilipeABSTRACT: The present work describes experimental studies related to the characterization of CuSbS2 directly synthesized after 2 h of mechanochemical synthesis (MCS) at 340 rpm, starting from mixtures of elemental powders. X-ray diffraction (XRD) and UV-VIS-NIR spectroscopy were carried out to analyze the crystal structure, degree of crystallinity, crystallite size and optical properties of the mechanochemicall...
Structural and optical characterization of mechanochemically synthesized CuSbS2...
Esperto, Luís; Figueira, Isabel; Mascarenhas, João; Silva, Teresa; Correia, J.B.; Neves, FilipeABSTRACT: One of the areas of research on materials for thin-film solar cells focuses on replacing In and Ga with more earth-abundant elements. In that respect, chalcostibite (CuSbS2) is being considered as a promising environmentally friendly and cost-effective photovoltaic absorber material. In the present work, single CuSbS2 phase was synthesized directly by a short-duration (2 h) mechanochemical-synthesis s...
Structural and Optical Characterization of Mechanochemically Synthesized CuSbS2...
Esperto, Luís; Figueira, Isabel; Mascarenhas, João; Silva, Teresa; Correia, J.B.; Neves, FilipeABSTRACT: The present work describes experimental studies related to the characterization of CuSbS2 directly synthesized after 2 h of mechanochemical synthesis (MCS) at 340 rpm, starting from mixtures of elemental powders. X-ray diffraction (XRD) and UV-VIS-NIR spectroscopy were carried out to analyze the crystal structure, degree of crystallinity, crystallite size and optical properties of the mechanochemicall...
Structural and optical characterization of mechanochemically synthesized CuSbS2...
Esperto, Luís; Figueira, Isabel; Mascarenhas, João; Silva, Teresa; Correia, J.B.; Neves, FilipeABSTRACT: One of the areas of research on materials for thin-film solar cells focuses on replacing In and Ga with more earth-abundant elements. In that respect, chalcostibite (CuSbS2) is being considered as a promising environmentally friendly and cost-effective photovoltaic absorber material. In the present work, single CuSbS2 phase was synthesized directly by a short-duration (2 h) mechanochemical-synthesis s...
LocalEnergy: Local Resources for Multifunctional Tetrahedrite-based Energy: Har...
Neves, Filipe; Correia, J.B.; Esperto, Luís; Mascarenhas, João; Figueira, Isabel; de Oliveira, Daniel Pipa Soares; Salgueiro, Rute; Silva, Teresa
Dynamic corrosion testing of metals in solar salt for concentrated solar power
Sutter, Florian; Oskay, Ceyhun; Galetz, Mathias Christian; Cunha Diamantino, Teresa; Pedrosa, Fátima; Figueira, Isabel; Glumm, Stefan; Bonk, AlexanderABSTRACT: Potassium nitrate and sodium nitrate in mixing proportion of KNO3-NaNO3 40-60 wt% (also called solar salt) has been successfully used for over a decade as heat storage medium for concentrated solar power parabolic-trough collector plants at temperatures up to 400 degrees C. At temperatures of 560 degrees C, reached in state-of-the-art solar tower systems, corrosion of metallic components in contact wi...
Recovery of mining waste as source of raw material for the synthesis of tetrahe...
Neves, Filipe; Esperto, Luís; Figueira, Isabel; Mascarenhas, João; Salgueiro, Rute; Silva, Teresa; Correia, J.B.; Carvalho, Patricia Almeida
Dynamic corrosion testing of metals in solar salt for concentrated solar power
Sutter, Florian; Oskay, Ceyhun; Galetz, Mathias Christian; Cunha Diamantino, Teresa; Pedrosa, Fátima; Figueira, Isabel; Glumm, Stefan; Bonk, AlexanderABSTRACT: Potassium nitrate and sodium nitrate in mixing proportion of KNO3-NaNO3 40-60 wt% (also called solar salt) has been successfully used for over a decade as heat storage medium for concentrated solar power parabolic-trough collector plants at temperatures up to 400 degrees C. At temperatures of 560 degrees C, reached in state-of-the-art solar tower systems, corrosion of metallic components in contact wi...
Mechanochemical synthesis of tetrahedrite materials using mixtures of synthetic...
Neves, Filipe; Esperto, Luís; Figueira, Isabel; Mascarenhas, João; Salgueiro, Rute; Silva, Teresa; Correia, J.B.; Carvalho, Patricia AlmeidaABSTRACT: Considering that the synthesis of tetrahedrite-based materials usually uses high purity elements, the evaluation of the direct application of ore samples as raw materials for their synthesis is a pertinent issue. In the present study, multiphase synthetic tetrahedrite samples were mixed with tetrahedrite-tennantite ore samples (in weight ratios of 0.8/0.2, 0.5/0.5 and 0.2/0.8) to produce tetrahedrite-...
Corrosão de aços inoxidáveis austeníticos em sais fundidos ternários de cálcio
Cunha Diamantino, Teresa; Gomes, A.; Paiva Luís, Teresa; Figueira, Isabel; Pedrosa, Fátima; Nogueira, Carlos; Guerreiro, L.; Collares-Pereira, M.RESUMO: O armazenamento de energia térmica (TES) é um fator chave para melhorar a eficiência e a despachabilidade dos diferentes sistemas energéticos, devido a um melhor ajustamento entre a procura e a oferta de energia, e ao permitir o desenvolvimento e a implementação de energias renováveis. Um exemplo claro é o TES em instalações de concentração de energia solar (CSP), onde o excesso de energia solar durante...