Browsing Institutt for materialteknologi by Title

Now showing items 779-798 of 2504

    • Electrodeposition of Silicon in Fluoride Melts: Production of Silicon Films 

      Famiyeh, Lord (Master thesis, 2011)
      There has been considerable interest in electrodeposition of silicon from fluoride melts on a suitable substrate for its application in thin film solar cells. The goal of this work is to produce a high purity silicon films ...

    • Electrodeposition of Silicon with a Liquid Gallium Cathode in Molten Salts 

      Haarberg, Geir Martin; Kato, Tomonori; Norikawa, Yutaro; Nohira, Toshiyuki (Journal article; Peer reviewed, 2019)
      Further development of solar power depends largely on the availability of inexpensive solar grade silicon. Electrodeposition is a candidate method to produce high purity silicon at a reasonable cost. A new approach using ...

    • Electrodeposition of zinc from acidic electrolyte 

      Rosenberg, Even Andersen (Master thesis, 2017)
      Industrial zinc electrowinning is carried out in an aqueous solution of zinc sulfate in sulfuric acid. The anodes are made of a lead-silver alloy and the cathodes are made of a relatively pure aluminium alloy. A common ...

    • 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 ...

    • Electrolysis in reduced gravitational environments: current research perspectives and future applications 

      Akay, Ömer; Bashkatov, Aleksandr; Coy, Emerson; Eckert, Kerstin; Einarsrud, Kristian Etienne; Friedrich, Andreas; Kimmel, Benjamin; Loos, Stefan; Mutschke, Gerd; Röntzsch, Lars; Symes, Mark D.; Yang, Xuegeng; Brinkert, Katharina (Peer reviewed; Journal article, 2022)
      Electrochemical energy conversion technologies play a crucial role in space missions, for example, in the Environmental Control and Life Support System (ECLSS) on the International Space Station (ISS). They are also vitally ...

    • Electrolysis of indium oxide in LiCl-KCl based molten salts with a liquid cathode 

      Cui, Peng; Qin, Bo; Martinez, Ana Maria Cuellar; Haarberg, Geir Martin (Peer reviewed; Journal article, 2020)
      In this work, the feasibility of extracting of metallic indium from In2O3and ITO through the direct electrochemical reduction at 450°C in molten salt LiCl-KCl was studied. Cyclic voltammetry was carried out to study the ...

    • Electrolyte Melt Compositions for Low Temperature Molten Carbonate Thermocell 

      Kandhasamy, Sathiyaraj; Solheim, Asbjørn; Kjelstrup, Signe; Haarberg, Geir Martin (Journal article; Peer reviewed, 2018)
      Industrial processes for the production of metals and alloys by metallurgical and electrochemical methods generate a great deal of waste heat due to irreversible losses. This waste heat may be used as a power source to ...

    • Electrolytic Removal of Chloride from Acidic Nitrate Solutions 

      Sandland, Maiken (Master thesis, 2014)
      Chloride containing ores are among other things often used as the raw material in metal electrowinning from aqueous solutions. The dissolution of this ore may cause problems as chlorine gas will be evolved either as a side ...

    • Electromagnetic Casting of Aluminium: Analyzing the Effect of EM Fields on Al and Al-Si Alloy Compared to Commercial Grain Refiners 

      Lorenzen, Andrea.; Ossletten, Christel.; Helgeland, Halvor. (Bachelor thesis, 2022)
      Dette prosjektet hadde som formål å sammenligne den mulige kornfinings effekten fra et indusert elektromagnetisk felt med kommersielle kornfinere på en kommersiellt ren aluminium (99.7%) og en aluminium-silisium legering ...

    • Electromagnetically Enhanced Priming of Ceramic Foam Filters 

      Fritzsch, Robert (Doctoral thesis at NTNU;2016:250, Doctoral thesis, 2016)
      Impurities in aluminium can cause detrimental physical and chemical inhomogeneity in the final products, as well as potentially catastrophic failures. Hence, one of the key aspects during production of aluminium and its ...

    • Electromechanics of Domain Walls in Uniaxial Ferroelectrics 

      Lu, Haidong; Tan, Yueze; Richarz, Leonie; He, Jiali; Wang, Bo; Meier, Dennis; Chen, Long-Qing; Gruverman, Alexei (Peer reviewed; Journal article, 2023)
      Piezoresponse force microscopy (PFM) is used for investigation of the electromechanical behavior of the head-to-head (H-H) and tail-to-tail (T-T) domain walls on the non-polar surfaces of three uniaxial ferroelectric ...

    • Electronic and structural properties of the natural dyes curcumin, bixin and indigo 

      Michels, Leander; Richter, Annika; Chellappan, Rajesh Kumar; Røst, Håkon Ivarssønn; Behsen, Alenka Djarmila; Wells, Kristin Høydalsvik; Leal, Luciano; Santana, Vilany; Blawid, Rosana; da Silva, Geraldo J.; Cooil, Simon; Wells, Justin William; Blawid, Stefan (Peer reviewed; Journal article, 2021)
      An optical, electronic and structural characterisation of three natural dyes potentially interesting for application in organic solar cells, curcumin (C21H20O6), bixin (C25H30O4) and indigo (C16H10N2O2), was performed. ...

    • Electronic bulk and domain wall properties in B-site doped hexagonal ErMnO3 

      Holstad, Theodor S.; Evans, Donald; Ruff, Alexander; Småbråten, Didrik Rene; Schaab, Jakob; Tzschaschel, Christian; Yan, Zewu; Bourret, Edith; Selbach, Sverre Magnus; Krohns, Stephan; Meier, Dennis (Journal article; Peer reviewed, 2018)
      Acceptor and donor doping is a standard for tailoring semiconductors. More recently, doping was adapted to optimize the behavior at ferroelectric domain walls. In contrast to more than a century of research on semiconductors, ...

    • Electronic properties of reduced molybdenum oxides 

      Inzani, Katherine; Nematollahi, Mohammadreza; Vullum-Bruer, Fride; Grande, Tor; Reenaas, Turid Worren; Selbach, Sverre Magnus (Journal article; Peer reviewed, 2017)
      The electronic properties of MoO3 and reduced molybdenum oxide phases are studied by density functional theory (DFT) alongside characterization of mixed phase MoOx films. Molybdenum oxide is utilized in compositions ranging ...

    • Electronic Property Engineering in a Ferroelectric Oxide: Nanostructuring and Advanced Characterization. 

      He, Jiali (Doctoral theses at NTNU;2024:102, Doctoral thesis, 2024)
      The advancement of electronic nanotechnology hinges on the use of innovative materials and new conceptual approaches for devices to meet the demand of miniaturization, energy efficiency, and sustainability. Ferroelectric ...

    • Electronic structure and growth of electrochemically formed iridium oxide films 

      Ilyukhina, Liudmila Igorevna; Sunde, Svein; Richard, Haverkamp (Journal article; Peer reviewed, 2017)
      The nature of the electronic structure of electrochemically formed iridium oxide films (EIROF) is investigated by in-situ conductivity measurements in an electrochemical cell and ex-situ current-sensing atomic force ...

    • Electronic Structure and Surface Chemistry of Hexagonal Boron Nitride on HOPG and Nickel Substrates 

      Småbråten, Didrik Rene; Nylund, Inger-Emma; Marshall, Kenneth; Walker, Julian Bradley; Benelmekki, Maria; Einarsrud, Mari-Ann; Kioseoglou, Joseph; Selbach, Sverre Magnus (Peer reviewed; Journal article, 2023)
      The effect of point defects and interactions with the substrate are shown by density functional theory calculations to be of significant importance for the structure and functional properties of hexagonal boron nitride ...

    • Electronic-beam evaporation processed titanium oxide as an electron selective contact for silicon solar cells 

      Matkivskyi, Vladyslav; Lee, Youngseok; Seo, Hyeon Sik; Lee, Doh-Kwon; Park, Jong-Keuk; Kim, Inho (Journal article; Peer reviewed, 2021)
      This work is dedicated to the study of electronic-beam (e-beam) evaporated titanium oxide (TiOx) contact for polycrystalline silicon hetero-junction solar cells. A TiOx material obtained by e-beam evaporation method is ...

    • Electroplating of Stainless Steel in Aqueous Alkaline Solution 

      Thu, Ida Soland (Master thesis, 2017)
      Electroplated stainless steel alloys containing elements such as iron, chromium and nickel, are of great interest in production of electronics and nanotechnology devices. Previous methods for electroplating of these alloys ...

    • Electrostatic potential mapping at ferroelectric domain walls by low-temperature photoemission electron microscopy 

      Schaab, Jakob; Shapovalov, Konstantin; Schoenherr, Peggy; Hackl, Johanna; Khan, Muhammad Imtiaz; Hentschel, Mario; Yan, Zewu; Bourret, Edith; Schneider, Claus M.; Nemsak, Slavomír; Stengel, Massimiliano; Cano, Andrés; Meier, Dennis (Journal article; Peer reviewed, 2019)
      Low-temperature X-ray photoemission electron microscopy (X-PEEM) is used to measure the electric potential at domain walls in improper ferroelectric Er0.99Ca0.01MnO3. By combining X-PEEM with scanning probe microscopy and ...