Browsing Institutt for materialteknologi by Title
Now showing items 2494-2513 of 2579
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An ultra-low field SQUID magnetometer for measuring antiferromagnetic and weakly remanent magnetic materials at low temperatures
(Journal article, 2023)A novel setup for measuring magnetic fields of antiferromagnets (i.e., quadrupolar or higher-order magnetic fields) and generally weakly remanent magnetic materials is presented. The setup features a highly sensitive ... -
Ultrahigh thermoelectric performance in Cu2−ySe0.5S0.5 liquid-like materials
(Journal article, 2017)Liquid-like thermoelectric materials have recently received heightened attentions due to their exceptional thermal and electrical transport properties. As a typical example, Cu2−ySe has good electrical transport properties ... -
Unconventional Continuous Structural Disorder at the Order-Disorder Phase Transition in the Hexagonal Manganites
(Journal article; Peer reviewed, 2019)The improper ferroelectricity in YMnO3 and other related multiferroic hexagonal manganites is known to cause topologically protected ferroelectric domains that give rise to rich and diverse physical phenomena. The local ... -
Understanding Anode Overpotential
(Journal article, 2014)In aluminium electrolysis cells the anodic process is associated with a substantial overpotential. Industrial carbon anodes are produced from a blend of coke materials, but the effect of coke type on anodic overpotential ... -
Understanding reaction mechanisms using dynamic electrochemical impedance spectroscopy: Methanol oxidation on Pt
(Journal article; Peer reviewed, 2019)Data from a combined cyclic voltammetry and dynamic electrochemical impedance spectroscopy (dEIS) study of the methanol oxidation reaction (MOR) at high temperatures was revisited using a new method for mechanistic modeling. ... -
Understanding reaction mechanisms using dynamic electrochemical impedance spectroscopy: Methanol oxidation on Pt
(Journal article; Peer reviewed, 2019)Data from a combined cyclic voltammetry and dynamic electrochemical impedance spectroscopy (dEIS) study of the methanol oxidation reaction (MOR) at high temperatures was revisited using a new method for mechanistic modeling. ... -
Understanding the Hydrothermal Formation of NaNbO3: Its Full Reaction Scheme and Kinetics
(Peer reviewed; Journal article, 2021)Sodium niobate (NaNbO3) attracts attention for its great potential in a variety of applications, for instance, due to its unique optical properties. Still, optimization of its synthetic procedures is hard due to the lack ... -
Understanding the inoculation of aluminium grains during welding under the influences of high cooling rate and high temperature gradient
(Peer reviewed; Journal article, 2023)Inoculation is an important method to generate fine equiaxed grain structures in alloys during solidification, which is widely used in shape casting and direct chill casting processes of aluminium alloys. Different from ... -
Undersøkelse av metoder for elektrodemontering og -materialer i Hoopes-prosessen
(Bachelor thesis, 2021)Aluminium fra Hall-Héroult-prosessen kan raffineres videre til superrent aluminium i en trelags elektrolyseprosess kalt Hoopes-prosessen. Elektrodene i prosessen består av grafitt, en beskyttende keramklokke, og de er ... -
Undersøkelse av urenheter i elektrolytt for produksjon av kobber
(Master thesis, 2023)Tellur-ioner (Te4+ og Te6+), vismut-ioner (Bi3+), antimon-ioner (Sb3+) og klor-ioner (Cl– ) er typiske urenheter i en kobberelektrolytt. Det var ønskelig˚a undersøke disse urenhetene da det er relativt ukjent hva slags ... -
Uniaxial Néel vector control in perovskite oxide thin films by anisotropic strain engineering
(Peer reviewed; Journal article, 2021)Antiferromagnetic (AF) thin films typically exhibit a multidomain state, and control of the AF Néel vector is challenging, as AF materials are robust to magnetic perturbations. In this paper, uniaxial Néel vector control ... -
A unified approach for the calculation of in-plane dielectric constant of films with interdigitated electrodes
(Peer reviewed; Journal article, 2020)Interdigitated electrodes (IDEs) on dielectric films is an important electrode design in electrical components such as transducers and sensors. Further development and use of IDEs for characterization of the in-plane ... -
Unraveling the enhanced stability and strength of Al Σ9 (221)[ 1 1 ¯ 0 ] symmetric tilt grain boundary with Mg segregation
(Journal article; Peer reviewed, 2022) -
Unveiling AC electronic properties at ferroelectric domain walls
(Journal article; Peer reviewed, 2021) -
Use of a Distributed Micro-sensor System for Monitoring the Indoor Particulate Matter Concentration in the Atmosphere of Ferroalloy Production Plants
(Peer reviewed; Journal article, 2022)Airborne particulate matter (PM) is a concern for both occupational health and the environment, and, in the ferroalloy industry, the level of such particles in the air can be considerable. Small, low-cost sensors for ... -
The Use of Fe-26Si-9B Alloy as Phase Change Material in Si<inf>3</inf>N<inf>4</inf> Container
(Peer reviewed; Journal article, 2022)Fe-26Si-9B alloy was selected as a potential phase change material (PCM) to store energy at temperatures up to 1300 °C. A suitable refractory material is crucial to building a PCM container for Fe-26Si-9B alloy in thermal ... -
Use of H2 in Mn-Ferroalloy Production
(Chapter, 2023)The use of H2 as a reductant in the iron and steel industry is an obvious choice towards carbon neutrality. For pyrometallurgical processes like Mn and Si, H2 cannot be the only solution, as the stability of the oxides of ... -
The use of hydrogen as a potential reductant in the chromite smelting industry
(Peer reviewed; Journal article, 2022)The chromium (Cr) content of stainless steel originates from recycled scrap and/or ferrochrome (FeCr), which is mainly produced by the carbothermic reduction of chromite ore. Ever-increasing pressure on FeCr producers to ... -
Using AERMOD to predict the dispersion of emissions from the aluminum industry
(Master thesis, 2022)Økt fokus på de miljøskadelige effektene av utslipp har gitt opphav til strengere krav i sammenheng med utsippskontroll i aluminiumsindustrien. Derfor ønsker industrien å innføre effektive måter å estimere dispersjonen av ... -
Using Rotating Permanent Magnets for Pumping Aluminium in a Liquid Metal Loop
(Bachelor thesis, 2024)Aluminiumindustrien er avhengig av å pumpe flytende metall under resirkuleringsprosesser. På grunn av de høye korrosive egenskapene til flytende aluminium, må de eksisterende metodene for pumping unngå kontakt mellom ...