Browsing Institutt for materialteknologi by Issue Date
Now showing items 521-540 of 2540
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Solid-State Synthesis and Properties of Relaxor (1 – x)BKT–xBNZ Ceramics
(Journal article; Peer reviewed, 2014-07-08)Conventional solid-state synthesis was used to synthesize dense and phase pure ceramics in the (1−x) Bi0.5K0.5TiO3–xBi0.5Na0.5ZrO3 (BKT–BNZ) system. Structural characterization was done using X-ray diffraction at both room ... -
Optimisation of chemical solution deposition of Indium Tin Oxide thin films
(Journal article; Peer reviewed, 2014-12-31)An environmentally friendly aqueous sol–gel process has been optimised to deposit indium tin oxide (ITO) thin films, aiming to improve the film properties and reduce the deposition costs. It was demonstrated how parameters ... -
Multi-level modelling of mechanical anisotropy of commercial pure aluminium plate: Crystal plasticity models, advanced yield functions and parameter identification
(Journal article; Peer reviewed, 2015)The mechanical anisotropy of an AA1050 aluminium plate is studied by the use of five crystal plasticity models and two advanced yield functions. In-plane uniaxial tension properties of the plate were predicted by the ... -
Kinetics of the reaction between quartz and silicon carbide in different gas atmospheres
(Master thesis, 2015)This thesis examined the influence of different gas species in the kinetics of SiO2+SiC reaction. The quartz and silicon carbide were crushed to < 38µm, uniformly mixed together with weight ratio of 3:1 and pelletized into ... -
Controlling the self-assembly and optical properties of gold nanoclusters and gold nanoparticles biomineralized with bovine serum albumin
(Journal article; Peer reviewed, 2015)While the size-dependent optical properties of BSA-stabilized gold nanoclusters are well known, the time-dependent growth mechanism remains to be described. Herein, we systematically compare two synthesis methods with and ... -
Numerical modelling of a Czochralski furnace with active cooling jacket - Optimization of quality and througput
(Master thesis, 2015)In the single crystal silicon Czochlarski process, pull rate has a great impact on its production. More and more people put their eyes on optimizing the structure of Cz furnace to increase the pull rate, but experiments ... -
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 ... -
Lead-Free Ferroelectric Materials based on BiFeO3 and Bi0.5K0.5TiO3
(Doctoral thesis at NTNU;2015:180, Doctoral thesis, 2015)Blyfrie ferroelektriske materialer basert på BiFeO3 og Bi0.5K0.5TiO3 Ferroelektriske materialer finnes i dag i nesten all elektronikk, inkludert forbrukerelektronikk, som for eksempel blekk-printere, mobiltelefoner og ... -
The carbon-electrolyte interface at high cathodic voltages
(Journal article, 2015)Different carbon materials (graphitic and carbon black) were investigated with respect to their electrochemical stability at high voltages in organic electrolytes typically used for Li-ion batteries. The materials were ... -
Development of Hydrophobic Surfaces for Anti-Icing Applications
(Master thesis, 2015)Prevention of ice formation is an important yet dicult task for many industries operating under freezing conditions, such as aeronautics and the oil industry. Ice accumulation can severely limit the operational eciency, ... -
Correlation between coke type, microstructure and anodic reaction overpotential in aluminium electrolysis
(Journal article; Peer reviewed, 2015)Although the anode process during aluminum electrolysis has a substantial overpotential that increases the energy demand and production cost of aluminum, properties of the coke that can influence the electrochemical ... -
Synthesis of hydrides by interaction of intermetallic compounds with ammonia
(Journal article; Peer reviewed, 2015)Interaction of intermetallic compounds with ammonia was studied as a processing route to synthesize hydrides and hydridonitrides of intermetallic compounds having various stoichiometries and types of crystal structures, ... -
Korrosjonsoppførsel av AA5083- og AA6082-legeringer ved ulike temperaturer.
(Master thesis, 2015)Olje- og gassindustrien søker stadig nye områder i jakten på uoppdagede reservoarer, og det blir derfor stadig viktigere å forstå hvordan nye miljø og endringer i klima påvirker aktuelle aluminiumslegeringers egenskaper. ... -
High temperature X-ray diffraction and thermo-gravimetrical analysis of the cubic perovskite Ba0.5Sr0.5Co0.8Fe0.2O3-δ under different atmospheres
(Journal article; Peer reviewed, 2015)Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) with the cubic perovskite structure is known to be metastable at low temperature under an oxidizing atmosphere. Here, the thermal and chemical expansion of BSCF were studied by in situ high ... -
Selectivity of nanocrystalline Iro2-based catalysts in parallel chlorine and oxygen evolution
(Journal article; Peer reviewed, 2015)Nanocrystalline electrocatalysts with chemical composition corresponding to Ir1 − xMxO2 (M = Co, Ni, and Zn, 0.05 ≤ x ≤ 0.2) were prepared by the hydrolysis of H2IrCl6·4H2O solutions combined with nitrates and acetates of ... -
Impurities and Current Efficiency in Aluminum Electrolysis
(Doctoral thesis at NTNU;2015:220, Doctoral thesis, 2015)Different factors can contribute to current efficiency loss in aluminum electrolysis and one of them is due to the presence of impurities. Concerns on impurities have been raised since decline in raw material quality and ... -
A thermodynamic assessment of the Nd-C system
(Journal article; Peer reviewed, 2015)The Nd–C binary system has been assessed based on the experimental investigation, thermodynamic calculations and the literature survey. The intermediate compounds Nd2C3 and βNdC2 (high-temperature form of NdC2 phase) were ... -
The effect of mesoporous silica nanoparticle surface chemistry and concentration on the α-synuclein fibrillation
(Journal article; Peer reviewed, 2015)The aggregation of an amyloid protein, α-synuclein (α-Syn), has been suggested as a potential cause of Parkinson's and several other neurodegenerative diseases. To explore the possibility of using nanoparticle-based ... -
Studie av andel deltaferritt og austenitt som funksjon av anløpingstemperatur med in-situ HT-XRD i S165M martensittisk rustfritt stål
(Master thesis, 2015)Denne oppgaven har som formål å avgjøre om bruk av in-situ høytemperatur røntgendiffraksjon kan brukes til å analysere utviklingen av austenitt og δ-ferritt i det martensittiske rustfrie stålet S165M, omtrent 16% krom, 5 ... -
Optimization of chemical composition of novel manganite oxides for oxygen permeable membranes
(Master thesis, 2015)Every year, millions of tons of high purity oxygen are produced mainly by cryogenic distillation. Since this process is energetically demanding, there is a need for more energy efficient technologies, and the use of oxygen ...