July 22, 2020 Presentation Open Access

Neves, Filipe; Esperto, Luís; Figueira, Isabel; Mascarenhas, João; Salgueiro, Rute; Pena Silva, Teresa; Brito Correia, José; de Oliveira, Daniel; Almeida, Patricia

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    "description": "<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&rsquo;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 Barrig&atilde;o 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 &ndash; Funda&ccedil;&atilde;o para a Ci&ecirc;ncia e a Tecnologia, I.P., under the project PTDC/EAM-PEC/29905/2017 (LocalEnergy project, http://localenergy.lneg.pt).</p>", 
    "license": {
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    "title": "Processing of tetrahedrite-based thermoelectric materials using tetrahedrite-tennantite copper ores", 
    "notes": "This work is funded by national funds through the FCT \u2013 Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia, I.P., under the project PTDC/EAM-PEC/29905/2017 (Project LocalEnergy \u2013 \"Local Resources for Multifunctional Tetrahedrite-based Energy-Harvesting Applications\", (http://localenergy.lneg.pt).", 
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    "keywords": [
      "Tetrahedrite", 
      "Mechanochemical synthesis"
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    "publication_date": "2020-07-22", 
    "creators": [
      {
        "affiliation": "LNEG", 
        "name": "Neves, Filipe"
      }, 
      {
        "affiliation": "LNEG", 
        "name": "Esperto, Lu\u00eds"
      }, 
      {
        "affiliation": "LNEG", 
        "name": "Figueira, Isabel"
      }, 
      {
        "affiliation": "LNEG", 
        "name": "Mascarenhas, Jo\u00e3o"
      }, 
      {
        "affiliation": "LNEG", 
        "name": "Salgueiro, Rute"
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      {
        "affiliation": "LNEG", 
        "name": "Pena Silva, Teresa"
      }, 
      {
        "affiliation": "LNEG", 
        "name": "Brito Correia, Jos\u00e9"
      }, 
      {
        "affiliation": "LNEG", 
        "name": "de Oliveira, Daniel"
      }, 
      {
        "affiliation": "SINTEF", 
        "name": "Almeida, Patricia"
      }
    ], 
    "meeting": {
      "dates": "July 21-23, 2020", 
      "title": "Virtual Conference on Thermoelectrics, VCT 2020", 
      "acronym": "VCT 2020", 
      "url": "https://conferences.mines.edu/vct2020/", 
      "session": "Session A6 - Chalcogenides II", 
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