Browsing Institutt for materialteknologi by Title
Now showing items 1992-2011 of 2505
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Silicon directional solidification Impurity segregation and defects
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:161, Doctoral thesis, 2014) -
Silicon for silicon nitride based products
(Master thesis, 2013)Previous studies have shown that the oxide layer on the surface of silicon particles can reduce the hydrogen evolution that comes from contacting silicon with water during slip casting, prior to nitridation. This study ... -
Silicon for silicon nitride based products
(Master thesis, 2014)Previous studies have investigated the effect of the oxide layer (Ovregård 2013) and iron content (Hem 2013) on the nitridation of silicon powders. This report will take a closer look into the growth mechanisms of different ... -
Silicon for silicon nitride based products
(Master thesis, 2013)Previous studies have shown that the oxide layer on the surface of silicon particles can reduce the hydrogen evolution that comes from contacting silicon with water during slip casting, prior to nitridation. This study ... -
Silicon for Solar Cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:140, Doctoral thesis, 2005)This thesis work consists of two parts, each with a different motivation. Part II is the main part and was partly conducted in industry, at ScanWafer ASA’s plant no.2 in Glomfjord. The large growth in the Photo Voltaic ... -
Silicon for the Chemical and Solar Industry XV
(Book, 2020) -
Silicon Nanoparticle Ensembles for Lithium-Ion Batteries Elucidated by Small-Angle Neutron Scattering
(Journal article; Peer reviewed, 2019)Silicon in the form of nanoparticles has attracted significant interest in the field of lithium-ion batteries due to the enormous capability of lithium intake. In the present work we demonstrate the characterization of ... -
Silicon nanowires grown-on-graphite as composite anodes for high-energy lithium ion batteries
(Master thesis, 2022)Silisium er et lovende anodematerial for fremtidige litium-ionbatterier med høy energitetthet, men det finnes utfordringer med lav elektrisk ledningsevne og store volumendringer av materialet under sykling. Silisium ... -
Silicon purification by acid leaching and slag refining techniques
(Doctoral theses at NTNU;2021:117, Doctoral thesis, 2021)Solar energy has become the most popular and fastest-growing renewable energy resource worldwide. However, it still requires the current solar-grade silicon (SoG-Si, purity 99.9999%) production with a larger manufacturing ... -
SILICON PURIFICATION THROUGH MAGNESIUM ADDITION AND ACID LEACHING
(Chapter, 2016)Silicon is the dominant material in photovoltaic devices and with regard to the PV market growth, the demand for solar grade silicon feedstock is expected to be high in the future. Although solar silicon is currently ... -
Silicon refining through alloying by calcium and magnesium, controlled solidification and leaching
(Bachelor thesis, 2022)I denne bacheloroppgaven var målet å bedre forstå hvordan avkjølingshastighet påvirker raffinering av silisium, når legeringssystemet Si-Ca-Mg brukes i forbindelse med utluting med syre. Mikrostruktur og effektiv fjerning ... -
A simple method enabling efficient quantitative analysis of the Portevin–Le Chatelier band characteristics
(Peer reviewed; Journal article, 2022)Localized deformation bands are often observed in materials exhibiting the Portevin–Le Chatelier (PLC) effect. However, efficient quantitative analysis of PLC bands remains challenging. A novel method is thus proposed in ... -
Simulation of Anion-Exchange Membrane Water Electrolyser with degradation of IrO2 as electrocatalyst for oxygen evolution
(Master thesis, 2023)Økende effekter av global oppvarming som skyldes voksende mengder CO2 og andre drivhusgasser forbundet med menneskelig industri øker motivasjonen for å finne erstatninger for fossile brensler. Hydrogen har lenge vært en ... -
Simulation of potential and species distribution in a Li||Bi liquid metal battery using coupled meshes
(Journal article; Peer reviewed, 2023)In this work a 1D finite volume based model using coupled meshes is introduced to capture potential and species distribution throughout the discharge process in a lithium–bismuth liquid metal battery while neglecting ... -
A Single-Pot Co-Precipitation Synthesis Route for Ni-Rich Layered Oxide Materials with High Cycling Stability
(Peer reviewed; Journal article, 2022)In this work we report variations of LiNi0.88Mn0.06Co0.06O2 synthesised through a single-pot oxalic acid co-precipitation route, in which all cation precursors were added in the same step. The effects of Al-doping, ... -
Sintering and transport properties of Al-LLZO ceramic electrolytes for use in solid-state Li-ion batteries
(Master thesis, 2021)Faststoffelektrolytter blir forsket på som en mulig substitutt til de flytende organiske elektrolyttene som brukes i dagens Li-ion batterier. Bruk av faststoffelektrolytter vil øke batterisikkerheten, og muliggjøre bruk ... -
Sintering behaviour and mechanical properties of porous alumina ceramics
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:316, Doctoral thesis, 2013)Alumina is a commercial ceramic material with high strength, good chemical durability and excellent electrical insulating properties. Porous alumina has been identied as the prime candidate as a porous bipolar membrane in ... -
Sintering of lead-free piezoelectric materials
(Master thesis, 2015)Piezoelectric ceramics are used in many types of devices, and today, lead zirconate titanate (PZT) dominates the market due to its superior properties. Environmental and health concerns have made the search for lead-free ... -
Sintering of sub-micron K0.5Na0.5NbO3 powders fabricated by spray pyrolysis
(Journal article; Peer reviewed, 2015)K0.5Na0.5NbO3 (KNN)-based ceramics are promising lead-free piezoelectrics, but processing of these materials is an ongoing challenge. Here, we present a spray pyrolysis route to highquality KNN-based powders. Fine-grained ... -
Sintering Properties and Li-ion Conductivity of Solid-State Electrolytes with Composition Li7−xLa3Zr2−xTaxO12 (x=0.25 and x=0.6)
(Master thesis, 2022)Den siste tiden har det vært en økende interesse for faststoffelektrolytter som potensielle erstatninger for de flytende organiske elektrolyttene som brukes i nåværende Li-ion-batterier. Bruk av faststoffelektrolytter vil ...