Browsing Institutt for materialteknologi by Title
Now showing items 1741-1760 of 2565
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Perfluorocarbon Formation During Rare Earth Electrolysis
(Journal article; Peer reviewed, 2018)A challenge during rare earth (RE) electrolysis is to avoid emissions of perfluorocarbon (PFC) green-house gases. The objective of this work was to study how to operate the RE electrolysis process with neither PFC formation ... -
Performance and failure analysis of full cell lithium ion battery with LiNi0.8Co0.15Al0.05O2 and silicon electrodes
(Journal article; Peer reviewed, 2019)The influence of the lithium inventory on the performance and degradation mechanism of NCA||Si cells operating at a third of the theoretical silicon capacity is analysed. The lithium inventory was increased by electrochemical ... -
The performance change of aluminum electrolysis in standard cryolite electrolyte with cathodic current density
(Master thesis, 2017)A series of experiments were performed to verify the effect of current density in current efficiency of aluminum electrolysis in molten salts. To avoid interference of other parameters, a special designed laboratory cell ... -
Performance Modeling of Bifacial PV Power Plants in a Nordic Climate
(Master thesis, 2022)Bifacial fotovoltaisk (PV) teknologi kan produsere energi fra begge sider av modulen, og kan dermed øke energitettheten ved å utnytte reflektert lys. Teknologien har også vist potensiale til å kunne redusere utjevnet ... -
Performance of a thermoelectric module based on n-type (La0.12Sr0.88)0.95TiO3-δ and p-type Ca3Co4-xO9+δ
(Journal article; Peer reviewed, 2020)Here, we present the performance of a thermoelectric (TE) module consisting of n-type (La0.12Sr0.88)0.95TiO3 and p-type Ca3Co4-xO9+δ materials. The main challenge in this investigation was operation of TE module in different ... -
Performance of activated stainless steel and nickel-based anodes in alkaline water electrolyser
(Peer reviewed; Journal article, 2023)Four different alloys including SS316, SS304, Inconel718 and Incoloy800 are activated by electro-oxidation at +1.70 V vs. RHE in 7.5 M KOH for 18 h. Their OER activity are evaluated ex-situ using linear sweep voltammetry ... -
Performance of Al-5Ti-1B master alloy after ball milling on minimizing hot tearing in Al-7Si-3Cu alloy
(Journal article; Peer reviewed, 2017)Hot tearing of Al–7Si–3Cu alloys with addition of as received Al–5Ti–1B grain refiner and ball milled grain refiner have been studied with constrained mould casting to investigate the effect of these additions on hot tear ... -
Performance of an electrochromic window based on polyaniline, prussian blue and tungsten oxide
(Journal article; Peer reviewed, 1999)In our laboratory various electrochromic windows (ECWs) have been investigated using mainly tungsten oxide (WO3), polyaniline (PANI) and prussian blue (PB) as electrochromic materials in combination with poly(2-acrylamid ... -
Performance of Regular and Modified Ceramic Foam Filters (CFFs) during Aluminium Melt Filtration in a Pilot-Scale Setup
(Peer reviewed; Journal article, 2022)Liquid metal filtration through a ceramic medium has proven to be an efficient way to secure the removal of inclusions and bifilms from molten aluminium. With an increasing focus on recycling of metal values throughout the ... -
Performance of supported catalysts for water electrolysis
(Master thesis, 2012)The most active catalyst for oxygen evolution in PEM water electrolysis is ruthenium oxide. Its major drawback as a commercial catalyst is its poor stability. In a mixed oxide with iridium, ruthenium becomes more stable. ... -
Performance Study of MXene/Carbon Nanotube Composites for Current Collector- and Binder-Free Mg-S Batteries
(Peer reviewed; Journal article, 2021)The realization of sustainable and cheap Mg-S batteries depends on significant improvements in cycling stability. Building on the immense research on cathode optimization from Li-S batteries, for the first time a beneficial ... -
Permanent Effect of a Cryogenic Spill on Fracture Properties of Carbon Steel
(Master thesis, 2015)In this work, the permanent effect of a cryogenic spill on the fracture properties of carbon steel was investigated. The experimental work consisted of two main parts. The first part was the examination of a plate of ... -
Permanent effect of a cryogenic spill on fracture properties of structural steels
(Journal article; Peer reviewed, 2015)Fracture analysis of a standard construction steel platform deck, which had been exposed to a liquid nitrogen spill, showed that the brittle fracture started at a flaw in the weld as a consequence of low-temperature ... -
Permeation and Stability Properties of Asymmetric and Disk Shaped Oxygen Permeable Membranes Intended for Syn-Gas Production
(Master thesis, 2012)In this study, the oxygen permeation and stability properties of disk shaped and asymmetric membranes, both of the composition La0.2Sr0.8Fe0.8Al0.2O3-δ were investigated. Strontium doped Lanthanum ferrite is an oxygen ... -
PFC evolution characteristics during aluminium and rare earth electrolysis
(Journal article; Peer reviewed, 2018)In addition to aluminium electrolysis, the electrolysis of rare earth (RE) metals from fluoride melts is a significant source of perfluorocarbon (PFC) emissions to the atmosphere. These processes have many similarities, ... -
PFC Evolution in the Aluminium Production Process
(Doctoral theses at NTNU;2017:137, Doctoral thesis, 2017)Improvements in the Hall-Héroult process for electrowinning of aluminium have drastically reduced the anode effect duration, frequency and its associated perfluorocarbon (PFC) evolution, especially over the past 50 years. ... -
pH-dependence of chloride binding in ordinary Portland cement
(Master thesis, 2018)A new method for artificially leaching hydrated cement paste and studying how lowered pH in the pore solution affects chloride binding has been developed. Hydrated cement paste was exposed to a NaCl-solution before being ... -
Phase composition, microstructure and resistance to attrition of alumina-based supports for Fischer-Tropsch catalysts
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:43, Doctoral thesis, 2012)The key element in gas-to-liquid technology is the Fischer-Tropsch (FT) synthesis in which liquid hydrocarbons are produced from syngas (CO and H2). During FT synthesis the catalyst and the catalyst support are subjected ... -
Phase Distribution During Slag Formation in Mn Ferroalloy Production
(Peer reviewed; Journal article, 2022)Phase development during slag formation and reduction of Comilog and Assmang ores in a setup that simulates the conditions in an industrial SAF process under different coke bed temperatures, 1473 K (1200 °C), 1673 K (1400 ... -
Phase relations and thermomechanical properties of (Gd2Zr2O7)1-x(YbSZ)x based thermal barrier coatings (0 ≤x≤ 0.98)
(Peer reviewed; Journal article, 2021)Doped Gd2Zr2O7 materials have interesting properties as thermal barrier coatings (TBC) to replace the YSZ topcoats traditionally used. Here we investigate the thermomechanical properties and phase relations of Gd2Zr2O7 ...