2024-03-28T17:43:40Z
https://zenodo.org/oai2d
oai:zenodo.org:4618083
2021-03-19T00:27:08Z
user-localenergy_project
Neves, Filipe
Esperto, Luís
Figueira, Isabel
Mascarenhas, João
Correia, José Brito
Ferreira, Helena
Lopes, Elsa
Gonçalves, António Perira
2019-04-15
<p>Abstract of the oral presentation made at Materiais 2019</p>
This work is funded by national funds through the FCT – Fundação para a Ciência e a Tecnologia, I.P., under the project PTDC/EAM-PEC/29905/2017 (Project LocalEnergy – "Local Resources for Multifunctional Tetrahedrite-based Energy-Harvesting Applications", (http://localenergy.lneg.pt).
https://doi.org/10.5281/zenodo.4618083
oai:zenodo.org:4618083
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.4618082
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Materiais 2019, Materiais 2019, XIX Congress of Sociedade Portuguesa de Materiais and X International Symposium on Materials, Lisbon, 14 – 17 April 2019
Tetrahedrite
Mechanochemical synthesis
Powder sintering of single-phase tetrahedrite materials
info:eu-repo/semantics/conferencePaper
oai:zenodo.org:7050675
2022-09-05T14:26:18Z
user-localenergy_project
Santos, B.
Lopes, E.B.
Neves, F.
Gonçalves, A.P.
2021-04-12
<p>Extended abstract, SCTE 2021 - The International Conference on Solid Compounds of Transition Elements, April 12 – 15, 2021</p>
https://doi.org/10.5281/zenodo.7050675
oai:zenodo.org:7050675
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.7050674
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Natural Alternatives for Thermoelectric Materials
info:eu-repo/semantics/conferencePaper
oai:zenodo.org:4605706
2021-03-18T11:44:39Z
openaire
user-localenergy_project
Neves, Filipe
Esperto, Luís
Figueira, Isabel
Mascarenhas, João
Salgueiro, Rute
Pena Silva, Teresa
Brito Correia, José
de Oliveira, Daniel
Almeida, Patricia
2020-07-22
<p>Tetrahedrite-based compounds are considered a promising thermoelectric material. The tetrahedrite-tennantite series, that can be generically expressed as Cu<sub>6</sub>[Cu<sub>4</sub>(Fe,Zn)<sub>2</sub>](Sb,As)<sub>4</sub>S<sub>13</sub>, is one of the most abundant sulfosalt minerals in the earth’s crust. The Iberian Pyrite Belt (IPB), located in southern Portugal and Spain, is the host of the largest concentration of massive sulfide deposits worldwide, where the tetrahedrite-tennantite series mineral is one of the constituents. In this work we evaluate the effectiveness of combining synthetic tetrahedrite (ST) with tetrahedrite-tennantite ore samples (TTOS) in the mechanochemical synthesis (MCS) process of tetrahedrite-based compounds. The ore samples were collected from two distinct deposits within the Portuguese part of the IPB, the Neves Corvo mine and the abandoned Barrigão copper mine. The ST, also produced by MCS, were mixed with the TTOS in different mass ratios ranging from 20-80%. The influence of the chemical composition and phase constitution of the ore samples and of the mixing ratios will be presented in relation to the micro-structural properties of the obtained materials. The results here described are part of a broader study dedicated to the development of energy-harvesting applications based on tetrahedrite. This work is funded by national funds through the FCT – Fundação para a Ciência e a Tecnologia, I.P., under the project PTDC/EAM-PEC/29905/2017 (LocalEnergy project, http://localenergy.lneg.pt).</p>
This work is funded by national funds through the FCT – Fundação para a Ciência e a Tecnologia, I.P., under the project PTDC/EAM-PEC/29905/2017 (Project LocalEnergy – "Local Resources for Multifunctional Tetrahedrite-based Energy-Harvesting Applications", (http://localenergy.lneg.pt).
https://doi.org/10.5281/zenodo.4605706
oai:zenodo.org:4605706
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.4605705
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
VCT 2020, Virtual Conference on Thermoelectrics, VCT 2020, online, July 21-23, 2020
Tetrahedrite
Mechanochemical synthesis
Processing of tetrahedrite-based thermoelectric materials using tetrahedrite-tennantite copper ores
info:eu-repo/semantics/lecture
oai:zenodo.org:4616785
2021-03-18T12:27:17Z
user-localenergy_project
Neves, Filipe
Esperto, Luís
Figueira, Isabel
Mascarenhas, João
Salgueiro, Rute
Silva, Teresa
Correia, José Brito
Carvalho, Patrícia
de Oliveira, Daniel
2021-02-15
<p>Considering that the synthesis of tetrahedrite-based materials usually uses high purity elements, the evaluation of<br>
the direct application of ore samples as raw materials for their synthesis is a pertinent issue. In the present study,<br>
multiphase synthetic tetrahedrite samples were mixed with tetrahedrite-tennantite ore samples (in weight ratios<br>
of 0.8/0.2, 0.5/0.5 and 0.2/0.8) to produce tetrahedrite-based materials by solid-state mechanochemical synthesis.<br>
The ore samples were obtained from the abandoned Barrigão mine dumps and from the Neves Corvo<br>
mine, both located in the Portuguese zone of the Iberian Pyrite Belt, whose main constituents were found to be<br>
As-rich tetrahedrite and tennantite-(Fe), respectively. Depending on the ore sample and on the mixture ratios, the<br>
displacement reactions occurring during the synthesis process gave rise to different phase transformation paths.<br>
For the ratios of 0.5/0.5 and 0.2/0.8, the mixtures with the Barrigão ore were found to consist of a single sulfide<br>
phase, tetrahedrite-tennantite-(Fe), plus quartz, while famatinite was also observed in the 0.8/0.2 mixture.<br>
Tetrahedrite-tennantite-(Fe) phase was the main constituent of all mixtures with the Neves Corvo ore, but in all<br>
of them other sulfide phases, famatinite-luzonite and pyrite, were also present in addition to quartz. Despite<br>
being dissimilar, these results are very promising and encouraging, by confirming the possible direct usage of ore<br>
samples and of dump material for the synthesis of tetrahedrite-based materials with all the potential<br>
environmental-economic gains that can be obtained.</p>
This work is funded by national funds through the FCT – Fundação para a Ciência e a Tecnologia, I.P., under the project PTDC/EAM-PEC/29905/2017 (Project LocalEnergy – "Local Resources for Multifunctional Tetrahedrite-based Energy-Harvesting Applications", (http://localenergy.lneg.pt).
https://doi.org/10.1016/j.mineng.2021.106833
oai:zenodo.org:4616785
Zenodo
https://zenodo.org/communities/localenergy_project
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Tetrahedrite-tennantite
Mineral Processing
Mechanochemical synthesis
Iberian Pyrite Belt (IPB)
Mechanochemical synthesis of tetrahedrite materials using mixtures of synthetic and ore samples collected in the Portuguese zone of the Iberian Pyrite Belt
info:eu-repo/semantics/article
oai:zenodo.org:7050845
2023-08-27T18:39:46Z
user-localenergy_project
LocalEnergy Consortium
2022-07-01
<p>Description of LocalEenrgy project and main achiviements.</p>
https://doi.org/10.5281/zenodo.7050845
oai:zenodo.org:7050845
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.7050844
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
LocalEnergy - project characteristics and overview
info:eu-repo/semantics/article
oai:zenodo.org:7050725
2022-09-06T08:12:15Z
user-localenergy_project
Neves, F.
Esperto, L.
Figueira, I.
Mascarenhas, J.
Salgueiro, R.
SIlva, T.P.
Correia, J.B.
Carvalho, P.A.
Oliveira, D. de
2021-04-12
<p>Extended abstract and presentation, SCTE 2021 - The International Conference on Solid Compounds of Transition Elements, April 12 – 15, 2021</p>
https://doi.org/10.5281/zenodo.7050725
oai:zenodo.org:7050725
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.7050724
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Recovery of mining waste as source of raw material for the synthesis of tetrahedrite-tennantite materials
info:eu-repo/semantics/conferencePaper
oai:zenodo.org:7050643
2022-09-05T14:26:18Z
user-localenergy_project
Santos, B.
Neves, F.
Lopes, E.B.
Gonçalves, A.P.
2021-07-20
<p>Extended abstract, Virtual Conference on Thermoelectrics, VCT 2021, International Thermoelectrics Society (ITS), July 20-22, 2021.</p>
https://doi.org/10.5281/zenodo.7050643
oai:zenodo.org:7050643
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.7050642
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Finding enhanced thermoelectric properties in the combination of natural and synthetic tetrahedrites
info:eu-repo/semantics/conferencePaper
oai:zenodo.org:4618201
2021-03-19T00:27:08Z
user-localenergy_project
de Oliveira, Daniel
Salgueiro, Rute
Silva, Teresa P.
Reiser, F.
Guimarães, Fernanda
Neves, Filipe
2019-09-23
<p>Extended abstract from CIG 2019, XII Congresso Ibérico de Geoquímica/XX Semana da Geoquímica</p>
This work is funded by national funds through the FCT – Fundação para a Ciência e a Tecnologia, I.P., under the project PTDC/EAM-PEC/29905/2017 (Project LocalEnergy – "Local Resources for Multifunctional Tetrahedrite-based Energy-Harvesting Applications", (http://localenergy.lneg.pt).
https://doi.org/10.5281/zenodo.4618201
oai:zenodo.org:4618201
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.4618200
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
CIG 2019, CIG 2019, XII Congresso Ibérico de Geoquímica/XX Semana da Geoquímica, Évora, Portugal, 22-26 September 2019
Barrigão
antimony
tennantite-tetrahedrite
thermoelectric materials
CRM
The Barrigão copper deposit: tennantite-tetrahedrite for thermoelectric and high-technology applications
info:eu-repo/semantics/conferencePaper
oai:zenodo.org:7107803
2022-09-23T14:26:21Z
user-localenergy_project
Filipe Neves
2019-07-01
<p>General description of LocalEnergy project.</p>
https://doi.org/10.5281/zenodo.7107803
oai:zenodo.org:7107803
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.7107802
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Projetos I&DT Nacional - LNEG
info:eu-repo/semantics/article
oai:zenodo.org:7051044
2022-09-06T02:26:15Z
openaire
user-localenergy_project
Esperto, L.
Figueira, I.
Mascarenhas. J.
Silva, T.P.
Correia, J.B.
Neves, F.
2022-04-11
<p>Presentation at MATERIAIS 2022 - XX Congresso da Sociedade Portuguesa De Materiais and XI International Materials Symposium, April 10 – 13, 2022</p>
https://doi.org/10.5281/zenodo.7051044
oai:zenodo.org:7051044
Zenodo
https://zenodo.org/communities/localenergy_project
https://doi.org/10.5281/zenodo.7051043
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Structural and Optical Characterization of Mechanochemically Synthesized CuSbS2 Compounds
info:eu-repo/semantics/lecture