Browsing NTNU Open by Author "Safarian, Jafar"
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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 between Si–B alloys and Si3N4
Jiao, Jian Meng; Tang, Kai; Safarian, Jafar; Grorud, Bettina; Sellevoll, Kathrine; Tangstad, Merete (Peer reviewed; Journal article, 2021)Si3N4 is a candidate crucible material for Si–B alloys in high temperature thermal energy storage system. In this regard, the phase formation in the Si–B alloys and the interaction between the alloys and Si3N4 were ... -
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 ...