Blar i Institutt for materialteknologi på tittel
Viser treff 1696-1715 av 2527
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Oxygen permeation in symmetric and asymmetric La0.2Sr0.8Fe0.8Ta0.2O3-d membranes
(Journal article; Peer reviewed, 2016)La0.2Sr0.8Fe0.8Ta0.2O3 − δ (LSFT) is a mixed ionic electronic conductor (MIEC) at elevated temperatures and as such a candidate material for applications both in syn-gas synthesis and as electrodes in solid oxide fuel cells ... -
Oxygen stoichiometry and transport properties of cerium niobate
(Journal article; Peer reviewed, 2008)CeNbO4 + δ has been synthesized by both solid state and wet chemical routes and characterized with respect to electrical conductivity and oxygen stoichiometry between 900 °C and 1100 °C and pO2 from 1 bar to 0.002 bar. ... -
Oxygen vacancies in the bulk and at neutral domain walls in hexagonal YMnO3
(Journal article; Peer reviewed, 2018)We use density functional calculations to investigate the accommodation and migration of oxygen vacancies in bulk hexagonal YMnO3, and to study interactions between neutral ferroelectric domain walls and oxygen vacancies. ... -
P removal from Si by Si-Ca-Al alloying-leaching refining: Effect of Al and the CaAl2Si2 phase
(Peer reviewed; Journal article, 2021)Phosphorus (P) is a critical impurity in metallurgical-grade Si that needed to be removed for solar-grade Si production. The Si-Ca-Al-P system is one of the most crucial alloy systems for Si refining, where P can be separated ... -
PAH emissions from the metallurgical industry
(Doctoral theses at NTNU;2023:269, Doctoral thesis, 2023)Polycyclic aromatic hydrocarbons (PAHs) are a large group of organic molecules consisting of two or more fused aromatic rings. They can be created by incomplete combustion of organic materials and accumulate in nature. As ... -
Parameter Optimization of Mini 3D Printer for Additive Manufacturing of Hypereutectic Aluminum Silicon Alloys
(Master thesis, 2023)Denne oppgaven vil undersøke det stadig voksende feltet med additive produksjonsmetoder (AM) som brukes i produksjonen av komplekse tredimensjonale metallkomponenter. Det har spesielt vært en økning i interessen fra ulike ... -
Parameters Affecting Softening and Melting of Quartz
(Master thesis, 2016)The aim of this work was to develop and improve a new method for investigating how different parameters affect the softening and melting of quartz. The method should give quantitative results. Quartz is the stable phase ... -
Parameters Contributing to the Formation of NOx in the Silicon Furnace: The effect of the charging frequency and raw material composition on the formation of NO
(Master thesis, 2013)NOx is a harmful gas emitted primarily by the transport industry, agriculture and petroleum industry. The emissions contribute to acid rain and global warming. The gas also has certain health risks; when exposed to NO-based ... -
PARAMETRIC OPTIMISATION OF FRICTION STIR WELDING ON ALUMINIUM ALLOY (EN AW-1100) PLATES
(Peer reviewed; Journal article, 2023)Friction stir welding is a solid-state welding process used extensively for aluminium alloys. EN AW-1100 alloy is mostly used for its exceptional corrosion resistance, high ductility, high thermal and electrical conductivities, ... -
Parametric Study of Molten Aluminium Oxidation in Relation to Dross Formation at Laboratory and Industrial Scale
(Doctoral theses at NTNU, 2022:341, Doctoral thesis, 2022)Aluminium (Al) white dross, classified as a hazardous waste, is a heterogeneous mixture of metallic Al, oxides, and non-metallic compounds (NMC) originating from the primary production route of Al. Over the past few decades, ... -
Particle deposition characteristics in the formation of Hard Grey Scale (HGS) on cold surfaces exposed to aluminium production off-gas
(Peer reviewed; Journal article, 2021)Hard Grey Scale (HGS) is a hard and strongly adhering fouling material that forms on solid surfaces impinged by the off-gas generated in the pot cells of aluminium production plants. Different theories on HGS formation ... -
Particulate emissions from electrolysis cells
(Journal article; Peer reviewed, 2011)In the dry cleaning of the exhaust gas from the aluminium cells impurities are accumulated in the finer fractions of secondary alumina from the dry scrubbers. The present work describes new methods for the determination ... -
Passivation Threshold for the Oxidation of Liquid Silicon and Thermodynamic Non-equilibrium in the Gas Phase
(Journal article; Peer reviewed, 2018)The present study focuses on a specific step of the metallurgical path of purification to provide solar-grade silicon: the removal of boron through the injection of H2O(g)-H2(g)-Ar(g) (cold gas process). A progressive ... -
Påvirkning av suspensjonsegenskaper på fabrikasjon av silisiumkarbid keramiske produkter ved slikkerstøping
(Bachelor thesis, 2020)Hovedinnholdet i denne oppgaven er påvirkningen av suspensjonsegenskaper på fabrikasjonen av silisiumkarbidprodukter ved slikkerstøping. Silisiumkarbid keramikk har høy temperaturstabilitet, høy mekanisk styrke og god ... -
Pelletering av fiberslam for biokarbon og impregnering av pellets med bioolje
(Bachelor thesis, 2019) -
Pelletized shaped Mn-based solid-sorbents for chemical looping desulfurization
(Bachelor thesis, 2020)The growing concern about climate change and related greenhouse gas emissions is leading to the promotion of research into the use of environmentally friendly renewable energy. Biomass gasification and subsequent biofuels ... -
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 ...