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Browsing NTNU Open by Author "Safarian, Jafar"

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Now showing items 1-20 of 44

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    • AMADEUS: Next generation materials and solid state devices for ultra high temperature energy storage and conversion 

      Datas, Alejandro; Cristobal, Ana Belen; del Cañizo, Carlos; Antolin, Elisa; Beaughon, Michel; Nikolopoulos, Nikolaos; Nikolopoulos, Aristeidis; Zeneli, Myrto; Sobczak, Natalia; Polkowski, Wojciech; Tangstad, Merete; Safarian, Jafar; Trucchi, Daniele M; Bellucci, Alessandro; Girolami, Marco; Marx, Roman; Bestenlehner, Dominik; Lang, Stephan; Vitulano, Aniello; Sabbatella, Gianfranco; Marti, Antonio (Journal article; Peer reviewed, 2018)
      Starting in January 2017, AMADEUS (www.amadeus-project.eu) is the first project funded by the European Commission to research on a new generation of materials and solid state devices for ultra-high temperature energy storage ...
    • BORON REMOVAL FROM MOLTEN SILICON BY GAS BLOWING USING DIFFERENT GAS MIXTURES 

      Sanna, Claudio (Master thesis, 2016)
      -
    • Boron Removal from Silicon by Moisturized Gases 

      Safarian, Jafar; Sana, Claudio; Tranell, Gabriella (Chapter, 2017)
      The photovoltaic (PV) industry is in rapid growth and a large supply of PV feedstock materials must be provided to maintain this growth. Since silicon is still the dominant material for the fabrication of solar cells, ...
    • BORON REMOVAL FROM SILICON USING GAS REFINING AND DIFFERENT CRUCIBLE MATERIALS 

      Bhat, Akshay (Master thesis, 2016)
      -
    • Characteristics of Calcium-Aluminate Slags and Pig Iron Produced from Smelting-Reduction of Low-Grade Bauxites 

      Azof, Fabian Imanasa; Kolbeinsen, Leiv; Safarian, Jafar (Journal article; Peer reviewed, 2018)
      Low-grade bauxite ores are not favorable in the conventional Bayer process for alumina production, as they are producing more bauxite residue (red mud) and accompanying lower alumina yield than high-grade ores. In the ...
    • Effect of acid leaching conditions on impurity removal from silicon doped by magnesium 

      Espelien, Stine; Safarian, Jafar (Journal article; Peer reviewed, 2017)
      The effect of magnesium addition into a commercial silicon and its leaching refining behavior is studied for producing solar grade silicon feedstock. Two different levels of Mg is added into a commercial silicon and the ...
    • Effect of Magnesium Addition on Removal of Impurities from Silicon by Hydrometallurgical Treatment 

      Espelien, Stine; Tranell, Gabriella; Safarian, Jafar (Chapter, 2017)
      Hydrometallurgical treatment of silicon is an effective process for the removal of metallic impurities for producing solar grade silicon feedstock. In the present research, the removal of impurities from silicon is studied ...
    • Effect of Magnesium Addition on Removal of Impurities from Silicon by Hydrometallurgical Treatment 

      Espelien, Stine; Tranell, Gabriella; Safarian, Jafar (Chapter, 2017)
      Hydrometallurgical treatment of silicon is an effective process for the removal of metallic impurities for producing solar grade silicon feedstock. In the present research, the removal of impurities from silicon is studied ...
    • Ekstraksjon av sjeldne jordarter fra "grey mud" ved bruk av saltsyre 

      Salvesen, Malin (Master thesis, 2019)
      Bayer prosessen som brukes til produksjon av aluminiumoksid er ikke veldig bærekraftig på grunn av stor produksjon av avfallet rødslam. Dette avfallet skaper miljutfordringer på grunn av sin nødvendige lagring på land. En ...
    • High Temperature Interaction of Si-B Alloys with Graphite Crucible in Thermal Energy Storage Systems 

      Jiao, Jianmeng; Safarian, Jafar; Grorud, Bettina; Tangstad, Merete (Journal article; Peer reviewed, 2019)
      Si-B alloys are proposed as a potential phase change material (PCM) in the novel high temperature thermal energy storage systems. For successfully introducing the new PCM, the selection of proper refractory material in the ...
    • Hydrometallurgical Purification of Magnesium-Doped Silicon by Different Acids 

      Safarian, Jafar; Espelien, Stine (Chapter, 2017)
      The purification of commercial metallurgical grade silicon through alloying and then acid leaching is studied. Magnesium is added into molten silicon and then acid leaching of the solidified Si-Mg alloy by HCl, H2SO4 and ...
    • Impurity removal from Si by Si-Ca-Mg ternary alloying-leaching system 

      Zhu, Mengyi; Wan, Di; Tang, Kai; Safarian, Jafar (Peer reviewed; Journal article, 2020)
      In this work, Si-Ca-Mg alloys were made with different compositions and solidification conditions to investigate the impurity segregation and separation performance from Si, especially for the crucial P impurity at several ...
    • Interaction of Eutectic Fe-Si-B Alloy with Graphite Crucibles 

      Grorud, Bettina (Master thesis, 2018)
      The work in this thesis was performed as a part of the AMADEUS project. The goal was to experimentally investigate the interaction between eutectic Fe-Si-B alloy and dense graphite crucibles, and the results will be compared ...
    • Interactions of FeSi Alloys with Graphite Crucibles 

      Sellevoll, Kathrine (Master thesis, 2019)
      Arbeidet i denne avhandlingen har vært en del av EU-prosjektet AMADEUS, som undersøker nye faseendrende materialer (PCM) for "Latent Heat Thermal Energy Storage" (LHTES) systemer. Det overordnede målet for AMADEUS-prosjektet ...
    • Iron separation from bauxite through smelting reduction 

      Sellæg, Hanne (Master thesis, 2019)
      containing slag.   Sammendrag Alumina produksjon domineres kommersielt av Bayer-prosessen som også produserer rødslam. Dette kan ikke forbrukes og foråsaker store skader på miljøet. Et bærekraftig alternativ for bearbeiding ...
    • Iron Separation from Bauxite Through Smelting-Reduction Process 

      Sellæg, Hanne; Kolbeinsen, Leiv; Safarian, Jafar (Chapter, 2017)
      In the alumina production process through the dominant commercial Bayer process red mud, which is not consumable and causes serious environmental challenges is produced. Alternative sustainable process for bauxite treatment ...
    • Kinetic study of vacuum evaporation of elements from ternary melts; case of dilute solution of P in Si-Al melts 

      Hoseinpur Kermani, Arman; Tang, Kai; Safarian, Jafar (Journal article; Peer reviewed, 2019)
      This research is devoted to study phosphorus removal from Si-Al alloys by vacuum refining of the ternary system of dilute solutions of P in Si-20 wt%Al. The experiments were carried out in an induction furnace and after ...
    • Kinetics of the leaching of alumina-containing slag for alumina recovery 

      Azof, Fabian Imanasa; Kolbeinsen, Leiv; Safarian, Jafar (Chapter, 2019)
      The leaching kinetics of an alumina-containing slag produced from the smelting-reduction of low-grade bauxite, which contained a significant amount of iron and low levels of SiO2 and TiO2, is studied. The leaching rates ...
    • Leaching and Precipitation Experiments Related to the Pedersen Process 

      Nedkvitne, Eirik Nøst (Master thesis, 2019)
      Store mengder avfall rødslam generes fra produksjon av metallurgisk aluminiumoksid via den nåværende kommersielle Bayer prosessen. Deponering av avfallet byr på miljøutfordringer. Alternativt kan aluminiumoksid produseres ...
    • Leaching characteristics and mechanism of the synthetic calcium-aluminate slags for alumina recovery 

      Azof, Fabian Imanasa; Yang, Yongxiang; Panias, Dimitrios; Kolbeinsen, Leiv; Safarian, Jafar (Journal article; Peer reviewed, 2019)
      The leaching characteristics and mechanism of synthetic CaO-Al2O3 slags in alkaline solution at atmospheric pressure have been studied. The purpose of the study is to have a better understanding of the leaching part of the ...

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