Blar i Institutt for materialteknologi på forfatter "Andersson, Stefan"
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Boron Removal from Silicon Melt by gas Blowing Technique
Hoseinpur Kermani, Arman; Andersson, Stefan; Müller, Michael; Tang, Kai; Safarian, Jafar (Peer reviewed; Journal article, 2022)Due to the detrimental effects of boron (B) on the efficiency of silicon (Si) photovoltaic cells, complete boron removal from Si is necessary to produce solar grade Si (SoG–Si, with a maximum limit of 0.1 ppmw boron). Gas ... -
Evaporation and diffusion of Mn in inert systems
Olsen, Håkon Aleksander Hartvedt; Andersson, Stefan; Tranell, Gabriella (Journal article; Peer reviewed, 2018)This research is aimed to improve our knowledge on the dust formation and clustering in the ferroalloy industry. Specifically, this paper focuses on the evaporation of manganese metal, and how different parameters influence ... -
Fume Formation and Measurements in the Metal-Production Industry
Myklebust, Håkon (Doctoral theses at NTNU;2022:14, Doctoral thesis, 2021)Airborne Particulate Matter (PM) is considered to be a major concern for both occupational health and the environment, and in the metal production industry, the level of such particles in the air can be considerable. This ... -
Mechanisms and Kinetics of Boron Removal from Silicon by Humidified Hydrogen
Safarian, Jafar; Tang, Kai; Olsen, Jan Erik; Andersson, Stefan; Tranell, Gabriella; Hildal, Kjetil (Journal article; Peer reviewed, 2016)The removal of boron from silicon by top blowing of humidified hydrogen has been studied in the present work through experimental work, thermodynamic calculations, computational fluid dynamic modeling, and quantum chemistry ... -
Oxidation of Liquid Silicon in Air Atmospheres Containing Water Vapor
Ma, Yan; Jiang, Bo; Moosavi-Khoonsari, Elmira; Andersson, Stefan; Opila, Elizabeth J.; Tranell, Gabriella (Peer reviewed; Journal article, 2019)The oxidation of silicon (Si) has been extensively investigated over the past 50 years. Yet, an understanding of the mechanism and rate of liquid Si oxidation in atmospheres containing water vapor, is lacking. The effect ... -
Oxidation-Enhanced Evaporation in High-Carbon Ferromanganese
Myklebust, Håkon A Hartvedt Olsen; Andersson, Stefan; Tranell, Gabriella (Peer reviewed; Journal article, 2021)Lifetime and reliability in realistic operating conditions are important parameters for the application of thin-film piezoelectric microelectromechanical systems (piezoMEMS) based on lead zirconate titanate (PZT). Humidity ... -
Post Processing Approach to Model Microsilica Formation
Vachaparambil, Kurian J.; Einarsrud, Kristian Etienne; Dalaker, Halvor; Andersson, Stefan (Peer reviewed; Journal article, 2023)In this work an OpenFOAM-based framework to simulate the evolution of microsilica, which is an important byproduct in the silicon/ferrosilicon industries, is proposed. The framework decouples the combustion reaction of CO ... -
Selective Vacuum Evaporation by the Control of the Chemistry of Gas Phase in Vacuum Refining of Si
Hoseinpur Kermani, Arman; Andersson, Stefan; Tang, Kai; Safarian, Jafar (Peer reviewed; Journal article, 2021)The evaporation of P from liquid Si under vacuum and reduced pressures of H2, He, and Ar was studied to evaluate the feasibility of effective P removal with insignificant Si loss. It was found that the introduction of Ar ...