Now showing items 603-622 of 1545

    • Gamma-isotoper i industriell radiografi 

      Kjørsvik, Eline; Bastiansen, Tone Marie Åsen (Bachelor thesis, 2019)
      Problemstillingen i denne rapporten var å vurdere muligheten for å avvikle gamma-isotoper i indusriell radiografi. Store deler av arbeidet bestod av å utføre intervjuer med ulike bedrifter i bransjen. Det ble også utført ...
    • Gas Anodes Made of Porous Graphite for Aluminium Electrowinning 

      Khalaghi, Babak; Gudbrandsen, Henrik; Kjos, Ole Sigmund; Osen, Karen Sende; Paulsen, Ove; Mokkelbost, Tommy; Haarberg, Geir Martin (Journal article, 2017)
      One of the major downsides of the current aluminium production process is the high CO2 emission. One alternative is to replace the consumable carbon anodes with inert anodes so that oxygen evolves instead of CO2. Also PFC ...
    • Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells 

      Kandhasamy, Sathiyaraj; Haarberg, Geir Martin; Kjelstrup, Signe; Solheim, Asbjørn (Journal article; Peer reviewed, 2019)
      Thermo-electrochemical cells with inexpensive molten carbonate electrolyte and (CO2|O2) gas electrodes allow the possible conversion of high temperature waste heat from industrial processes into electricity. The cell ...
    • Gaseous reduction of Mn ores in CO-CO2 atmosphere 

      Larssen, Trine Asklund; Tangstad, Merete; Kero, Ida (Chapter, 2018)
      The efficiency in production of manganese ferroalloys is dependent on the gaseous reduction of the higher manganese oxides in the ores used as raw materials. The materials, descending in the furnace, will meet the furnace ...
    • Generator-Sensor Impedance at Double Channel Electrodes 

      Holm, Thomas; Ingdal, Mats; Strobl, Jonathan R; Fanavoll, Espen Vinge; Sunde, Svein; Seland, Frode; Harrington, David A. (Journal article; Peer reviewed, 2017)
      A method for measuring downstream concentration effects through electrochemical impedance spectroscopy at double channel electrodes is demonstrated. An ac current perturbation is applied at an upstream working electrode ...
    • Gjenvinning av Sjeldne Jordarter fra Elektronisk Avfall 

      Vinje, Berit Johansen (Master thesis, 2016)
      De sjeldne jordartene er en gruppe av grunnstoffer med like kjemiske egenskaper som omfatter lantanoidene og scandium og yttrium. I løpet av de siste tiårene har de blitt essensielle for moderne og grønn teknologi, men ...
    • Global formation of topological defects in the multiferroic hexagonal manganites 

      Meier, Quintin Noel; Lilienblum, Martin; Griffin, Sinead M; Conder, K; Pomjakushina, Ekaterina; Yan, Zewu; Bourret, Edith; Meier, Dennis; Lichtenberg, Frank; Salje, Ekhard K. H.; Spaldin, Nicola A.; Fiebig, Manfred; Cano, Andrés (Journal article; Peer reviewed, 2017)
      The spontaneous transformations associated with symmetry-breaking phase transitions generate domain structures and defects that may be topological in nature. The formation of these defects can be described according to the ...
    • Goldstone-like phonon modes in a (111)-strained perovskite 

      Marthinsen, Astrid; Griffin, Sinead M; Moreau, Magnus; Grande, Tor; Tybell, Per Thomas Martin; Selbach, Sverre Magnus (Journal article; Peer reviewed, 2018)
      Goldstone modes are massless particles resulting from spontaneous symmetry breaking. Although such modes are found in elementary particle physics as well as in condensed-matter systems like superfluid helium, superconductors, ...
    • Gradient in defect density of ZnO nanorods grown by cathodic delamination, a corrosion process, leads to end-specific luminescence 

      Iqbal, Danish; Sarfraz, Adnan; Erbe, Andreas (Journal article; Peer reviewed, 2018)
      ZnO nanorods were grown on a zinc substrate via cathodic delamination of a polymer coating, a tailored corrosion process, at room temperature. A comparison between in situ Raman spectra and post mortem cross sectional ...
    • Grain boundary effect on lifetime in high performance multicrystalline silicon during solar cell processing 

      Adamczyk, Krzysztof; Søndenå, Rune; M'hamdi, Mohammed; Autruffe, Antoine; Stokkan, Gaute; Di Sabatino, Marisa (Journal article; Peer reviewed, 2016)
      High performance multicrystalline silicon wafers used in solar cell processing have been investigated with focus on quantification of the grain boundary effect on lifetime. The lifetime of a set of 16 wafers from different ...
    • Grain boundary segregation in Pd-Cu-Ag alloys for high permeability hydrogen separation membranes 

      Løvvik, Ole Martin; Zhao, Dongdong; Li, Yanjun; Bredesen, Rune; Peters, Thijs (Journal article; Peer reviewed, 2018)
      Dense metal membranes that are based on palladium (Pd) are promising for hydrogen separation and production due to their high selectivity and permeability. Optimization of alloy composition has normally focused on bulk ...
    • Grain refinement in Ti6Al4V by means of boron additions 

      Hals, Terje (Master thesis, 2009)
    • Grain refinement of commercial EC Grade 1070 Aluminum alloy for electrical application 

      Hassanabadi, Massoud (Master thesis, 2014)
      The aluminium alloys for electrical conductivity applications are not grain refined since the addition of grain refiners might decrease their electrical conductivity by inserting impurities into the melt. Still, non-grain ...
    • Grain Refinement of Commercial EC Grade 1370 Aluminium Alloy for Electrical Applications 

      Hassanabadi, Massoud; Akhtar, Shahid; Arnberg, Lars; Aune, Ragnhild E. (Journal article; Peer reviewed, 2018)
      The purpose of the present study was to investigate the effect of different grain refiners’ additions on structure and electrical conductivity of commercially electrically conductive (EC) grade 1370 aluminium alloy. A ...
    • Grain Refinement of High Alloyed Steel With Cerium Addition 

      Dahle, Eivind Strand (Master thesis, 2011)
      This master thesis has the objective to improve the mechanical properties of Super Duplex steel by adding Elkem Grain Refiner (EGR). EGR is commercial grain refiner where the active element is cerium. Cerium is a strong ...
    • Growing gold nanostructures for shape-selective cellular uptake 

      Bandyopadhyay, Sulalit; McDonagh, Birgitte Hjelmeland; Singh, Gurvinder; Raghunathan, Karthik; Sandvig, Axel; Sandvig, Ioanna; Andreassen, Jens-Petter; Glomm, Wilhelm (Journal article; Peer reviewed, 2018)
      With development in the synthesis of shape- and size-dependent gold (Au) nanostructures (NSs) and their applications in nanomedicine, one of the biggest challenges is to understand the interaction of these shapes with ...
    • Growth Instabilities and Thermo-elastic Stresses in Czochralski Process for Silicon Single Crystal 

      Noghabi, Omidreza Asadi (Doktoravhandlinger ved NTNU, 1503-8181; 2014:150, Doctoral thesis, 2014)
      Silicon single crystal pulling process by Czochralski method is a multi-scale problem from atomistic scale defects up to several meters. This process involves several sources of instabilities e.g. crystal diameter perturbation, ...
    • Growth mechanisms for crystaldefects in silicon for solar cells 

      Ervik, Torunn Kringlen (Master thesis, 2009)
    • Guidelines for establishing an etching procedure for dislocation density measurements on multicrystalline silicon samples 

      Adamczyk, Krzysztof Jan; Stokkan, Gaute; Di Sabatino Lundberg, Marisa (Journal article; Peer reviewed, 2018)
      With multicrystalline silicon becoming the main material used for photovoltaic applications and dislocations being one of the main material limitations to better solar cell efficiency, etch pit density measurements are ...
    • Hardhetsreduksjon i varmepåvirket sone ved sveisereparasjon på utstyr i drift 

      Stegavik, Ståle Singstad; Kristensen, Jørgen; Stolpnes, Thomas (Bachelor thesis, 2020)
      Denne rapporten tar for seg identifisering og testing av en mulig metode å gjennomføre sveisereparasjoner av korrosjonsskader på utstyr i drift på olje- og gassanlegg. Eksempler på slikt utstyr er rør og tanker. Bakgrunnen ...