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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{
  "publisher": "Zenodo", 
  "DOI": "10.5281/zenodo.4605706", 
  "title": "Processing of tetrahedrite-based thermoelectric materials using tetrahedrite-tennantite copper ores", 
  "issued": {
    "date-parts": [
      [
        2020, 
        7, 
        22
      ]
    ]
  }, 
  "abstract": "<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>", 
  "author": [
    {
      "family": "Neves, Filipe"
    }, 
    {
      "family": "Esperto, Lu\u00eds"
    }, 
    {
      "family": "Figueira, Isabel"
    }, 
    {
      "family": "Mascarenhas, Jo\u00e3o"
    }, 
    {
      "family": "Salgueiro, Rute"
    }, 
    {
      "family": "Pena Silva, Teresa"
    }, 
    {
      "family": "Brito Correia, Jos\u00e9"
    }, 
    {
      "family": "de Oliveira, Daniel"
    }, 
    {
      "family": "Almeida, Patricia"
    }
  ], 
  "id": "4605706", 
  "note": "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).", 
  "event-place": "online", 
  "type": "speech", 
  "event": "Virtual Conference on Thermoelectrics, VCT 2020 (VCT 2020)"
}