Browsing Institutt for materialteknologi by Title
Now showing items 1612-1631 of 2562
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Novel process of coating Al on graphene involving organic aluminum accompanying microstructure evolution
(Journal article; Peer reviewed, 2018)A novel chemical reduction of organic aluminum for coating Al on the graphene surface is proposed. During the process, Al powder reacted with the (C2H5)2Br solution to produce (C2H5)3Al solution, followed by gradual ... -
Novel synthesis method of BaTiO3-nanoparticles - Synthesis of BaTiO3-nanoparticles by spray-pyrolysis of TiO2-nanoparticles dispersed in Ba(NO3)2-solution
(Master thesis, 2016)Ferroelectric materials are widely used in different technological applications. Lead zirconate titanate (PZT) materials are currently the most used, due to their excellent piezoelectric properties and relatively high ... -
Novel technique to study the wet chemical etching response of multi-crystalline silicon wafers
(Peer reviewed; Journal article, 2022)This study is based on the application of a combinatory method for surface and crystallinity analysis of crystalline materials. The obtained results illustrated the effects of different additives (isopropyl alcohol (IPA) ... -
Novel Topological Spin Solitons for Spintronics Applications
(Doctoral theses at NTNU;2021:227, Doctoral thesis, 2021)Topologically non-trivial spin solitons, such as skyrmions and magnetic edge dislocations, are particle-like nanoscale configurations in the magnetization field. In solid state systems, they can be written, moved, and ... -
Novel Zr- based AB2 Laves type Alloys as Advanced Anodes for High Energy - High Power Metal Hydride Batteries
(Doctoral theses at NTNU;2020:129, Doctoral thesis, 2020)Metal hydrides have been studied during the last five decades as efficient materials for various energy storage and conversion systems. Among applications, the use of metal hydrides as electrode materials is the most ... -
NTNU-SINTEF SolarNet: A solar irradiation monitoring network at high latitudes
(Peer reviewed; Journal article, 2023)This study presents a monitoring network for solar irradiation at high latitudes, called NTNU-SINTEF SolarNet. The network collects, with a time resolution ranging from seconds to hours, solar irradiance data, e.g. global ... -
Nucleation and Early Growth of Multicrystalline Solar Cell Silicon
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:355, Doctoral thesis, 2012)As the production of solar cell silicon evolves and new concepts are introduced, the need for a more complete understanding of the basic principles of silicon solidification is also increasing. Nucleation has previously ... -
Nucleation and Growth of High Performance Multicrystalline Silicon (HPMC-Si) in Si3N4 and SiC Coated Crucibles
(Master thesis, 2019)The silicon material for photovoltaic (PV) industry demands high quality. It is known that dislocation clusters are among the foremost limiting effects on the minority carrier lifetime, and thus the PV efficiency. The ... -
Nucleation and growth of multicrystalline silicon
(Doctoral theses at NTNU;2018:42, Doctoral thesis, 2018)This work has focused on the nucleation process of multicrystalline silicon (mc-Si) for photovoltaic (PV) applications during solidification in α-Si3N4 coated crucibles, the typical crucible coating used commercially. ... -
Nucleation of Primary Mg2Si in Al-Mg-Si Alloys
(Master thesis, 2014)Al-Mg2Si Metal Matrix Composites have the potential to replace the frequently used near- and hyper-eutectic Al-Si alloys. In the as-cast condition, these alloys can contain coarse dendritic primary Mg2Si particles which ... -
Nucleation of SiO2-CaO-Al2O3 Slag in Oxidative Ladle Refining of Metallurgical Grade Silicon
(Peer reviewed; Journal article, 2021)Oxidative ladle refining (OLR) is the most used refining method in industrial production of metallurgical grade silicon. OLR is performed by purging the liquid alloy with oxygen-enhanced air at 1823 K to 1873 K, reacting ... -
Numerical Modeling of Hydrogen Fluoride Adsorption
(Master thesis, 2021)Produksjonsmengden av aluminium øker for hvert år. For å møte etterspørselen, øker aluminiumsverk spenningen i elektrolysecellene for å øke produksjonen, men også den økonomiske gevinsten. En bi-effekt av dette er økt ... -
Numerical modelling and photo-electrochemical characterization of dye sensitized solar cells
(Master thesis, 2017)Current-potential characteristics were recorded, and intensity modulated photocurrent spectroscopy (IMPS), intensity modulated photovoltage spectroscopy (IMVS), and electrochemical impedance spectroscopy (EIS) was performed ... -
Numerical modelling of a Czochralski furnace with active cooling jacket - Optimization of quality and througput
(Master thesis, 2015)In the single crystal silicon Czochlarski process, pull rate has a great impact on its production. More and more people put their eyes on optimizing the structure of Cz furnace to increase the pull rate, but experiments ... -
Numerical simulation of bubble growth in a supersaturated solution
(Journal article; Peer reviewed, 2020)In this paper, a Volume of Fluid (VOF) based approach to simulate the growth of a pre-existing bubble in a supersaturated solution is developed and implemented in OpenFOAMⓇ. The model incorporates the Compressive Continuous ... -
Numerical simulation of continuum scale electrochemical hydrogen bubble evolution
(Peer reviewed; Journal article, 2021)One of the important aspects in improving the efficiency of electrochemical processes, such as water electrolysis, is the efficient removal of bubbles which evolve from the electrodes. Numerical modelling based on Computational ... -
Numerisk modellering av tilbakeglødingsoppførsel i utvalgte aluminiumslegeringer
(Master thesis, 2011)I denne rapporten er det tatt for seg modellering av mykningsreaksjoner etter deformasjon for AA1200- og AA3103-legeringer. Grunnleggende teori rundt mykningsreaksjonene for disse legeringene er presentert. Det er hentet ... -
Observation of cation-specific critical behavior at the improper ferroelectric phase transition in Gd2(MoO4)3
(Journal article; Peer reviewed, 2022) -
Observation of Electric-Field-Induced Structural Dislocations in a Ferroelectric Oxide
(Peer reviewed; Journal article, 2021)Dislocations are 1D topological defects with emergent electronic properties. Their low dimensionality and unique properties make them excellent candidates for innovative device concepts, ranging from dislocation-based ... -
Observation of uncompensated bound charges at improper ferroelectric domain walls
(Journal article; Peer reviewed, 2019)Low-temperature electrostatic force microscopy (EFM) is used to probe unconventional domain walls in the improper ferroelectric semiconductor Er0.99Ca0.01MnO3 down to cryogenic temperatures. The low-temperature EFM maps ...