50 documents found, page 1 of 5
Novel fast synthesis route for α-MgAgSb thermoelectric materials
Santos, Beatriz; Sá, Ana; Luz, Paulo P. da; Neves, Filipe; de Boor, Johannes; Pereira Gonçalves, AntonioABSTRACT: Thermoelectric (TE) materials capable of waste heat recovery in the temperature range of 300-525 K remain relatively underdeveloped compared to conventional Bi2Te3-based systems, which present inherent environmental, health, and cost challenges. Recently, MgAgSb-based compounds have garnered significant research interest for applications in this temperature range owing to their intrinsically low therm...
Thermoelectric Properties of Tetrahedrites Produced from Mixtures of Natural an...
Santos, Beatriz; Esperto, Luís; Figueira Vasques, Isabel; Mascarenhas, João; Lopes, E.B.; Salgueiro, Rute; Silva, Teresa; Correia, Jose B.ABSTRACT: Thermoelectric materials have considerable potential in the mitigation of the global energy crisis, through their ability to convert heat into electricity. This study aims to valorize natural resources, and potentially reduce production costs, by incorporating tetrahedrite-tennantite (td) ores from the Portuguese Iberian Pyrite Belt into synthetic samples. The ore samples were collected in a mine wast...
Tetrahedrite Nanocomposites for High Performance Thermoelectrics
Coelho, Rodrigo; Moço, Duarte; Sá, Ana; Luz, Paulo P. da; Neves, Filipe; Cerqueira, Maria de Fátima; Lopes, E.B.; Brito, Francisco; Mangelis, PanagiotisABSTRACT: Thermoelectric (TE) materials offer a promising solution to reduce green gas emissions, decrease energy consumption, and improve energy management due to their ability to directly convert heat into electricity and vice versa. Despite their potential, integrating new TE materials into bulk TE devices remains a challenge. To change this paradigm, the preparation of highly efficient tetrahedrite nanocomp...
Use of mining wastes for high-tech thermoelectric applications : The case of ST...
Morais, Igor; de Oliveira, Daniel Pipa Soares; Silva, Teresa; Albardeiro, Luís; Salgueiro, Rute; Neves, FilipeABSTRACT: Europe aims to become the first climate neutral continent by 2050, which means rapidly implementing a green transition to which the European Union (EU) is strongly committed through the European Green Deal. This green transition leverages unprecedented pressure on the intensive use of mineral resources. In this context the START project “Sustainable Energy Harvesting Systems Based on Innovative Mine W...
Tetrahedrite nanocomposites for high performance thermoelectrics
Coelho, Rodrigo; Moço, Duarte; Sá, Ana I.de; Luz, Paulo P.da; Neves, Filipe; Cerqueira, M. F.; Lopes, Elsa B.; Brito, Francisco P.; Mangelis, PanagiotisThermoelectric (TE) materials offer a promising solution to reduce green gas emissions, decrease energy consumption, and improve energy management due to their ability to directly convert heat into electricity and vice versa. Despite their potential, integrating new TE materials into bulk TE devices remains a challenge. To change this paradigm, the preparation of highly efficient tetrahedrite nanocomposites is ...
START Project: Conversion of secondary mineral resources into value-added produ...
Neves, Filipe
The START project: Transforming mining waste into waste heat recovery materials
Neves, Filipe; Vicenzi, BrunoABSTRACT: The START project aims to produce thermoelectric devices for waste heat recovery applications from secondary mineral resources (mining waste).
START Project: Conversion of secondary mineral resources into value-added produ...
Neves, Filipe
START Newsletter: Recover-Reform-Reuse for a Sustainable Future, Issue 4
Neves, Filipe; Vicenzi, BrunoABSTRACT: We are almost halfway through the project activities and what a journey this has been! The advances we have made together are nothing short of remarkable. This edition of our Newsletter is a testament to our collective dedication and the exciting progress we’ve achieved. The completion of our first Periodic Report marks a significant milestone, and the advancements in tetrahedrite mineral-based thermo...
Investigation of the Effect of Milling Time on Elemental Powders of Oxi-Reducti...
Teixeira, Rodolfo da Silva; Gurgel, Mônica Aline Magalhães; Rodrigues, Patricia Freitas; Freitas, Bruno Xavier de; Le Sénéchal, Naiara; Oliveira, R. V.ABSTRACT: Mechanical alloying (MA) is widely applied in the synthesis of blended elemental or prealloyed powders. This work evaluates the effect of milling time on elemental nickel and titanium powders produced by oxi-reduction and the hydrogenation-dehydrogenation process, respectively. The powders are characterized by scanning electron microscopy, X-ray diffraction, particle size, powder yield, and differenti...