Recent Submissions

  • Assessment of Established and New Separation Methods for Water-in-Oil Emulsions 

    Woxholt, Eirik Giil; Stavrum, Jørgen Sivertsen (Bachelor thesis, 2020)
    Råolje er en kjemisk blanding av hydrokarboner, heteroatomer, metalliske forbindelser og mange komplekse organiske forbindelser. Sammensetningen av disse varierer avhengig av hvor og når hentet, samt flere ander faktorer. ...
  • Electrodialytic Energy Storage System: Permselectivity, Stack Measurements and Life-Cycle Analysis 

    Krakhella, Kjersti Wergeland; Morales, Marjorie; Bock, Robert; Seland, Frode; Burheim, Odne Stokke; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2020)
    Reverse electrodialysis and electrodialysis can be combined into a closed energy storage system, allowing for storing surplus energy through a salinity difference between two solutions. A closed system benefits from simple ...
  • In-plane Ferroelectricity in Barium Titanate Films 

    Ræder, Trygve Magnus (Doctoral theses at NTNU;2020:201, Doctoral thesis, 2020)
    Ferroelectric materials are irreplaceable materials in electronics used everywhere in the modern society. The ferroelectric perovskites are the most widely used class of ferroelectric materials, and the use is dominated ...
  • Recrystallization and phase transformation of light metals induced by electric current flash heating 

    Wang, Shubo (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 ...
  • Piezoelectricity and rotostriction through polar and non-polar coupled instabilities in bismuth-based piezoceramics 

    Acosta, Matias; Schmitt, Ljubomira Ana; Cazorla, Claudio; Studer, Andrew; Zintler, Alexander; Glaum, Julia; Kleebe, Hans-Joachim; Donner, Wolfgang; Hoffman, Mark; Rödel, Jurgen; Hinterstein, Manuel (Peer reviewed; Journal article, 2016)
    Coupling of order parameters provides a means to tune functionality in advanced materials including multiferroics, superconductors, and ionic conductors. We demonstrate that the response of a frustrated ferroelectric state ...
  • One-step lipase-catalysed preparation of eslicarbazepine 

    El-Behairy, Mohammed Farrag; Sundby, Eirik (Peer reviewed; Journal article, 2016)
    The antiepileptic eslicarbazepine (S-licarbazepine) has been prepared in one step from its racemic form RS-licarbazepine via lipase catalysed kinetic resolution. A novel stereoselective simultaneous HPLC separations of ...
  • Influence of impurity element Sn on the precipitation of dispersoids and age hardening precipitates 

    Høgsæt, Rolf Eirik (Master thesis, 2019)
    Effekten av mikrolegeringselementer på presipitatherdingen til to forskjellige aluminium-legeringer, AA3003 og AA6082, ble undersøkt. For hver legering ble hardheten, samt elektrisk konduktivitet målt. Ved maksimal hardhet ...
  • Pressure drop in charge mixture in silicon production 

    Edfelt, Hanne (Master thesis, 2020)
    Lavere energiforbruk, en mer miljøvennlig produksjon og høyere silisium utbytte er viktige mål i silisium industrien. For å oppnå disse målene kreves det at prosessene i ovnen er stabile. Flere operasjonelle problemer har ...
  • Ekstraksjon av sjeldne jordarter fra "grey mud" ved bruk av saltsyre 

    Salvesen, Malin (Master thesis, 2019)
    Bayer prosessen som brukes til produksjon av aluminiumoksid er ikke veldig bærekraftig på grunn av stor produksjon av avfallet rødslam. Dette avfallet skaper miljutfordringer på grunn av sin nødvendige lagring på land. En ...
  • Freeze casting of piezoelectric BCZT for biomedical applications 

    Andersen, Freya Sofia (Master thesis, 2019)
    Bruken av piezoelektriske keramer som beinimplantat gir muligheten til å forsterke heling av skadet bein gjennom elektrisk stimulering in vivo. På denne måten kan rekonvalesenstiden og sannsynligheten for revisjonsutskiftninger ...
  • Multislice image simulations of sheared needle‐like precipitates in an Al‐Mg‐Si alloy 

    Christiansen, Emil; Ringdalen, Inga Gudem; Bjørge, Ruben; Marioara, Calin Daniel; Holmestad, Randi (Peer reviewed; Journal article, 2020)
    The image contrast of sheared needle‐like urn:x-wiley:00222720:media:jmi12901:jmi12901-math-0001 precipitates in the Al‐Mg‐Si alloy system is investigated with respect to shear‐plane positions, the number of shear‐planes, ...
  • Electrochemical contrast switching between black and white appearance of gelatin-covered zinc 

    Ksiazkiewicz, Agnieszka Natalia; Fernandez-Solis, Christian; Erbe, Andreas (Peer reviewed; Journal article, 2020)
    Zinc and its alloys are widely used in the surface protection of metallic structural materials. Thus, zinc is an interesting and relevant candidate material for preparing stimuli-responsive surfaces. In this work, the ...
  • The effect of preliminary heat treatment on the durability of reaction bonded silicon nitride crucibles for solar cells applications 

    Hendawi, Rania Tayseer Atieh; Ciftja, Arjan; Stokkan, Gaute; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2020)
    Silicon nitride crucibles have the potential to replace silica crucibles and reduce the cost of silicon crystallization because of their reusability potential. Till date, crucibles’ heat treatment before each use is a ...
  • Two-Phase Equilibrium Conditions in Nanopores 

    Rauter, Michael Tobias; Galteland, Olav; Erdos, Mate; Moultos, Othonas A.; Vlugt, Thijs J.H.; Schnell, Sondre Kvalvåg; Bedeaux, Dick; Kjelstrup, Signe (Peer reviewed; Journal article, 2020)
    It is known that thermodynamic properties of a system change upon confinement. To know how, is important for modelling of porous media. We propose to use Hill’s systematic thermodynamic analysis of confined systems to ...
  • Late-magmatic immiscibility during batholith formation: assessment of B isotopes and trace elements in tourmaline from the Land’s End granite, SW England 

    Drivenes, Kristian; B. Larsen, Rune; Müller, Axel; Sørensen, Bjørn Eske; Wiedenbeck, Michael; Raanes, Morten Peder (Peer reviewed; Journal article, 2015)
    Quartz–tourmaline orbicules are unevenly distributed in the roof segment of the Land's End granite, SW England. This study shows that the orbicules formed from an immiscible hydrous borosilicate melt produced during the ...
  • Oxidation of Liquid Silicon in Air Atmospheres Containing Water Vapor 

    Ma, Yan; Jiang, Bo; Moosavi-Khoonsari, Elmira; Andersson, Stefan; Opila, Elizabeth J.; Tranell, Gabriella (Peer reviewed; Journal article, 2019)
    The oxidation of silicon (Si) has been extensively investigated over the past 50 years. Yet, an understanding of the mechanism and rate of liquid Si oxidation in atmospheres containing water vapor, is lacking. The effect ...
  • X-ray Microprobe Investigation of Iron During a Simulated Silicon Feedstock Extraction Process 

    Bernardis, Sarah; Fakra, Sirine C.; Dal Martello, Elena; B. Larsen, Rune; Newman, Bonna K.; Fenning, David P.; Di Sabatino Lundberg, Marisa; Buonassisi, Tonio (Peer reviewed; Journal article, 2016)
    Elemental silicon is extracted through carbothermic reduction from silicon-bearing raw feedstock materials such as quartz and quartzites. We investigate the micron-scale distribution and valence state of iron, a deleterious ...
  • Cu Interlayer-Induced High-Strength Laser-Welded AISI 304 Steel-Niobium Joint 

    Shi, Mingxiao; Li, Yanjun; Ma, Xiang (Peer reviewed; Journal article, 2019)
    Joining niobium to austenitic stainless steel is necessary for the fabrication of particle accelerators. However, the brittle iron-niobium intermetallics formed in the joint significantly reduce the joint strength. Copper ...
  • Carbon Cathode Wear in Aluminium Electrolysis Cells 

    Senanu, Samuel; Wang, Zhaohui; Ratvik, Arne Petter; Grande, Tor (Peer reviewed; Journal article, 2019)
    Autopsies of six spent potlinings with different carbon cathode block grades, amperage regimes and cell designs were conducted at three separate smelters to reveal possible mechanisms causing cathode wear. The microstructure ...
  • Degradation mechanisms of AA 1350 aluminium alloy conductor strands in air and chloride solution 

    Foggi, Jiregna Hirko (Doctoral theses at NTNU;2020:170, Doctoral thesis, 2020)
    The primary aim of this doctoral thesis is to investigate the degradation mechanisms contributing to the failure of the aluminium strand material (AA 1350) used in steel reinforced aluminium conductors. These conductors ...

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