Blar i Institutt for materialteknologi på tittel
Viser treff 1904-1923 av 2559
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Reaction kinetics for reduction of manganese ore with carbon monoxide in the presence of carbon
(Dr. ingeniøravhandling, 0809-103X; 2002:135, Doctoral thesis, 2002)In the production of ferromanganese the gas-solid reactions taking place in the furnace shaft (the so-called pre-reduction zone, where higher manganese oxides in the manganese ore are reduced to MnO) are to a large extent ... -
Reaction pathway of the hydrothermal synthesis of AgCuO2 from in situ time-resolved X-ray diffraction
(Journal article; Peer reviewed, 2020)AgCuO2 is an interesting semiconductor oxide with appealing optical and electronic properties. While the oxide has been synthesized in bulk by different approaches, no study on the formation mechanism has been carried out ... -
Reaction Rate Analysis of Manganese Ore Prereduction in CO-CO2 Atmosphere
(Peer reviewed; Journal article, 2021)Variations in energy efficiency and climate gas emissions in production of manganese ferroalloys are largely related to the solid-state reduction of the manganese ores used as raw material in the production. The gas-solid ... -
Reactivity assessment of charcoal for use in silicon production
(Peer reviewed; Journal article, 2021)As charcoal is used in the silicon metal process, reactivity towards SiO is one of the most important properties that has strong effects on silicon recovery. The purpose of this study was to analyze anatomical properties ... -
Reactivity of Calcined Clays
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:218, Doctoral thesis, 2013)With 3-5 billion tons cement-produced every year, the cement industry is today the third largest emitter of CO2 in the world after fossil-fuel based energy plants serving heating/cooling of buildings and combustion engines ... -
Reactivity of Coke in Relation to Sulfur Level and Microstructure
(Journal article; Peer reviewed, 2019)The quality of coke materials available for anodes for the aluminium industry is changing and industrial cokes with higher impurity levels are now introduced. The cokes in the anodes must meet specifications with respect ... -
Recent developments on manufacturing and characterization of fused quartz crucibles for monocrystalline silicon for photovoltaic applications
(Peer reviewed; Journal article, 2022)The dominating technology of solar cell production today is based on monocrystalline silicon, produced mostly by the Czochralski process. Recently, the solar cell industry, has started to move towards growing larger and ... -
Recent trends in graphitic carbon nitride-based binary and ternary heterostructured electrodes for photoelectrochemical water splitting
(Journal article; Peer reviewed, 2021)The graphitic carbon nitride (g-C3N4) is a class of two-dimensional layered material. The ever-growing research on this fascinating material is due to its unique visible light absorption, surface, electrocatalytic, and ... -
Recombination activity of grain boundaries in high-performance multicrystalline Si during solar cell processing
(Journal article; Peer reviewed, 2018)In this work, we applied internal quantum efficiency mapping to study the recombination activity of grain boundaries in High Performance Multicrystalline Silicon under different processing conditions. Wafers were divided ... -
Recovery and Utilisation of Kerf Waste from Silicon Wafering Process
(Master thesis, 2018)While the green credentials of solar photovoltaic technology are often touted, there is still substantial room for improvement in the silicon solar photovoltaic value chain. In particular, silicon kerf which is a byproduct ... -
Recovery Kinetics in High Purity and Commercial Purity Aluminium Alloys
(Journal article, 2013)Motivated by improving current softening models for recycle friendly alloys, softening was investigated in high purity and commercial purity aluminium alloys. Utilizing the electron backscatter diffraction (EBSD) technique, ... -
Recovery of Iron and Aluminum from Bauxite Residue by Carbothermic Reduction and Slag Leaching
(Peer reviewed; Journal article, 2021)The recovery of major components of bauxite residue by carbothermic reduction at 1550–1750 °C and subsequent slag leaching in a Na3CO3(aq) solution is studied. Iron recovers primarily to pig-iron and lime is added to tune ... -
Recovery of molybdenum and rhenium in scrub liquors of fumes and dusts from roasting molybdenite concentrates
(Peer reviewed; Journal article, 2019)The present work addresses the recovery of rhenium from scrub liquor of molybdenite concentrate roasting fume and dust by solvent extraction method. According to the results, recovery of rhenium from the scrub liquor is ... -
Recovery of Precious Metals (Au, Ag, Pt, and Pd) from Urban Mining Through Copper Smelting
(Peer reviewed; Journal article, 2020)With the aim of investigating deportments of precious metals in pyrometallurgical processing of waste electrical and electronic equipment, the distributions of selected precious metals (gold, silver, platinum, and palladium) ... -
Recrystallisation Behaviour in Extruded Profiles of Non-Dispersoid Containing Al-Mg-Si Alloys
(Master thesis, 2015)Hot extrusion of non-dispersoid containing aluminium alloys commonly ends with a fully or partially recrystallised grain structure. However, the recrystallisation mechanisms, whether static or dynamic (taking place during ... -
Recrystallization and phase transformation of light metals induced by electric current flash heating
(Doctoral theses at NTNU;2020:186, Doctoral thesis, 2020)Aluminium (Al), and titanium (Ti) alloys are two commonly used light metal materials in the aerospace and automotive industry due to their high strength-to-weight ratio. Various heat treatments are applied to improve the ... -
Recycled Aluminium Alloys and their Models: Role and Behaviour of Alloying Elements during Alkaline Etching
(Peer reviewed; Journal article, 2023)Alkaline etching is a common pretreatment for aluminum surfaces. Etching behavior was compared between an alloy based on post-consumer scrap (PCS) and several model alloys of rolled AA3005 and extruded AA6060 with ... -
Recycling and Utilisation of Secondary Aluminium Products
(Master thesis, 2018)Efficient utilisation of secondary aluminium products is increasingly important as the energy consumption and CO2 emissions are greatly reduced by recycling compared to primary production. The aim of this study was to ... -
Recycling of Al from incinerator bottom ash with screw extruder
(Master thesis, 2021)Abstract will be available on 2024-07-01 -
Recycling of Aluminium from Mixed Household Waste
(Chapter, 2020)Aluminium is used in packaging due to its density, strength and preservative capabilities. This paper outlines a methodology to evaluate the recyclability of aluminium waste, where parameters of scrap type, pre-treatment ...