Browsing NTNU Open by Author "Dalaker, Halvor"
Now showing items 1-7 of 7
-
Capillary forces as a limiting factor for sawing of ultrathin silicon wafers by diamond multi-wire saw
Ryningen, Birgit; Tetlie, Pål; Johnsen, Sverre Gullikstad; Dalaker, Halvor (Peer reviewed; Journal article, 2020)Succeeding with ultrathin silicon wafer sawing by diamond multi-wire saw, is not only a matter of optimization; the challenges of thin wafer production and the capability limit have not yet been fully understood. In this ... -
High Temperature Decomposition of Methane on Quartz Pellets
Lindgaard, Henrik (Master thesis, 2015)This work has shown that pure methane, when exposed to quartz at a temperatures of 900°C and 1000°C, cracks and deposits carbon at a near constant rate. The deposition rates for the individual temperature levels were shown ... -
Modelling of gas-solid reactions - Usage of industrial off-gas for pre-reduction of manganese ores
Gustum, Mathias Grønberg (Master thesis, 2018)The traditional way of making manganese alloys are by reduction of different manganese oxides, iron oxides and silicon dioxide in a standalone electric furnace. That being said, manganese alloy producing companies may ... -
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 ... -
Reduction of SiO2 to SiC using natural gas
Ksiazek, Michal Tomasz; Tangstad, Merete; Dalaker, Halvor; Ringdalen, Eli (Journal article; Peer reviewed, 2014)This paper presents a preliminary study of SiC production by use of natural gas for reduction of silica. Direct reduction of SiO2 by gas mixtures containing CH4, H2, and Ar was studied at temperatures between 1273 K and ... -
Road-map for gas in the Norwegian metallurgical industry: greater value creation and reduced emissions
Dalaker, Halvor; Ringdalen, Eli; Kolbeinsen, Leiv; Mårdalen, Jostein (Research report, 2017)In order to increase the use of gas in metal production, we will need to develop new – and to further develop existing – gas-based technologies, which will need to be adopted on an industrial scale. In order to provide a ... -
Solubility of Carbon and Nitrogenin the Silicon Rich Part of theSi–C–N–B-System
Dalaker, Halvor (Doktoravhandlinger ved NTNU, 1503-8181; 2009:215, Doctoral thesis, 2009)