Browsing Institutt for materialteknologi by Title
Now showing items 943-962 of 1545
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N-type Czochralski silicon ingots - Oxygen-related defects in the last solid fraction
(Master thesis, 2016)The focus of this master's thesis has been the formation of oxygen-related defects in the last 10 cm before the tail in Czochralski silicon ingots for solar cell applications. For nine industrial standard ingots from ... -
N-type Czochralski silicon solidification: Oxygen- and copper-related defects formation
(Doctoral thesis at NTNU;2016:68, Doctoral thesis, 2016)This PhD work was focused on the formation of oxygen- and copper-related defects in ntype Czochralski silicon for solar cells. These defects are a very important source of material and solar cell performance degradation, ... -
Nano- porous proppants for shale oil and gas production
(Master thesis, 2014)Over the last decade a rapid increase in utilization of unconventional reservoirs ha occurred due to advances in horizontal drilling and multi-stage fracturing technology. Reservoirs that earlier were far beyond commercial ... -
Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
(Journal article; Peer reviewed, 2019)This paper compares the nano-scale structure of β” precipitates in a peak-aged Al-Mg-Si alloy before and after deformation. Three complementary advanced transmission electron microscopy techniques are used to reveal the ... -
Nanomaterialer for kjemisk oksygenlagring
(Master thesis, 2014)Faserene nanokrystalline pulvere av heksagonal RMnO3, hvor R er Y eller Dy, ble syntetisert med en våt-kjemisk syntesemetode , og prøvene ble varmebehandlet ved forskjellige temperaturer for å oppnå varierende krystallit ... -
Nanomaterials for Electrochemical Energy Conversion and Storage Technologies
(Journal article; Peer reviewed, 2019)In this modern era, our society faces a serious energy crisis due to increasing human population. Energy consumption starts from small-scale electronic gadgets to high power consuming electric vehicles. To supply power on ... -
Nanometer‐Scale Depth‐Resolved Atomic Layer Deposited SiO2 Thin Films Analyzed by Glow Discharge Optical Emission Spectroscopy
(Journal article; Peer reviewed, 2018)In this contribution, pulsed radio frequency (rf) glow discharge optical emission spectroscopy (GDOES) is used to investigate the film properties of SiO2 deposited by plasma enhanced atomic layer deposition (PEALD), for ... -
Nanopatterning and plasmonic properties of plasma sputtered gold on diatom frustules
(Journal article; Peer reviewed, 2013)Bio-silica nanostructures from diatoms (called frustules) featuring plasmonic gold nanoparticles (NPs) are elaborated using two methods based on plasma sputtering of gold. The first investigated method uses a thermal ... -
Nanostructured cathode materials for Li-ion batteries
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:32, Doctoral thesis, 2013) -
Nanostructured magnesium silicide Mg2Si and its electrochemical performance as an anode of a lithium ion battery
(Journal article, 2017)Nano-crystalline Mg2Si (Mg67Si33) and its Si-rich eutectic (Mg47Si53) composition were synthesized by hydrogen desorption-recombination process, casting and rapid solidification techniques. The synthesis of Mg2Si meets ... -
Nanostructured thin filmse - background, preparation and relation to the technological revolution of the 21st century
(Chapter, 2019)Thin film technology is a mature field encompassing a wide range of applications such as electronics, optical communications, and biosystems. The list of potential applications is practically endless with an impact in ... -
Natural Gas Anodes for Aluminium Electrolysis in Molten Fluorides
(Journal article; Peer reviewed, 2016)Industrial primary production of aluminium has been developed and improved over more than 100 years. The molten salt electrolysis process is still suffering from low energy efficiency and considerable emissions of greenhouse ... -
Natural Gas Anodes of Porous Graphite for Aluminium Electrolysis
(Doctoral theses at NTNU;2017:266, Doctoral thesis, 2017)Aluminium is the second metal produced in the world in terms of quantity. It is produced in a multistage process. First, aluminium ore is converted to pure aluminium oxide. The second stage is an electrolysis process. In ... -
New Insights into Computational Fluid Dynamic Modeling of the Resistivity and Overpotential in Reverse Electrodialysis
(Journal article; Peer reviewed, 2018)The resulting electrical potential of a reverse electrodialysis is reduced both due to ohmic and non-ohmic resistances. The non-ohmic resistance is mainly controlled by concentration polarization which is a considerable ... -
New Insights into Silicon Purification by AlloyingLeaching Refining: A Comparative Study of MgSi, CaSi, and CaMgSi Systems
(Peer reviewed; Journal article, 2020)In the present work, a comparative study of the silicon alloying–leaching purification process was carried out on the recently developed Mg–Si system, the Ca–Si system, and the novel ternary Ca–Mg–Si system. Insights were ... -
New low temperature aluminium production process
(Master thesis, 2019)Aluminiumsproduksjon i dag er både dyrt og tidkrevende, med flere høyenergikrevende steg på veien. Bauxitt må først graves ut, for så å bli raffinert til Al2O3. For å redusere Al2O3 til ren aluminium kreves temperaturer ... -
New Materials for Mg-ion batteries - Mn3O4 as cathode
(Master thesis, 2016)Due to drawbacks with the lithium ion battery technology, magnesium ion batteries are being researched as an alternative replacement system. An optimal combination of component materials has however not been discovered ... -
Ni/NiO nanosheets for alkaline hydrogen evolution reaction: In situ electrochemical-Raman study
(Journal article; Peer reviewed, 2020)Nickel/Nickel oxide (Ni/NiO) nanosheets heterostructure is a cheap and active catalyst for hydrogen evolution reaction (HER) in alkaline electrolytes. However, the reason for this activity is still under debate. Herein ... -
Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions.
(Journal article; Peer reviewed, 2019)Three dimensional α-Al dendrite tip growth under varying solute gradients in an Al-Cu-Si alloy melt has been studied using real time synchrotron X-ray imaging and mathematical modelling. X-radiographic image sequences with ... -
Nonlinear mechanical behaviour of Ba0.5Sr0.5Co0.8Fe0.2O3 − δ and in situ stress dependent synchrotron X-ray diffraction study
(Journal article; Peer reviewed, 2017)Perovskite type Ba0.5Sr0.5Co0.8Fe0.2O3 − δ ceramics display nonlinear stress-strain behaviour upon uniaxial compression at room temperature. Step functional loading experiments show that the nonlinear strain response of ...