Browsing Institutt for materialteknologi by Title

Now showing items 147-166 of 1612

    • C-TiB2 Composite Inert Cathode Material by Spark Plasma Sintering 

      Håberg, Audun (Master thesis, 2018)
      TiB2 has been considered a potential inert, wettable cathode material for aluminum reduction cells for a long time. An important characteristic of TiB2 as a cathode material, is its excellent wetting properties towards ...

    • Calcareous smectite clay as a pozzolanic alternative to kaolin 

      Danner, Tobias; Norden, Geir; Justnes, Harald (Journal article; Peer reviewed, 2019)
      The hydration of cement pastes with addition of a kaolinite rich clay (Clay A) and a calcareous smectite rich clay (Clay B) was investigated with isothermal calorimetry, in-situ XRD, PXRD, TGA and EPMA. Portland cement was ...

    • Calcination temperature dependent catalytic activity and stability of IrO2 – Ta2O5 anodes for oxygen evolution reaction in aqueous sulfate electrolytes 

      Xu, Wenting; Haarberg, Geir Martin; Sunde, Svein; Seland, Frode; Ratvik, Arne Petter; zimmerman, erik; Shimamune, T; Gustavsson, J; Åkre, Torjus (Journal article; Peer reviewed, 2017)
      In this work, commercial IrO2-Ta2O5 anodes with a certain composition calcined at three different temperatures were investigated. The results show that the calcination temperature has a significant influence on the ...

    • Capillary forces as a limiting factor for sawing of ultrathin silicon wafers by diamond multi-wire saw 

      Ryningen, Birgit; Tetlie, Pål; Johnsen, Sverre Gullikstad; Dalaker, Halvor (Peer reviewed; Journal article, 2020)
      Succeeding with ultrathin silicon wafer sawing by diamond multi-wire saw, is not only a matter of optimization; the challenges of thin wafer production and the capability limit have not yet been fully understood. In this ...

    • Carbon Behaviour during Si Production 

      Jin, Zhejun (Master thesis, 2013)
      First, the carbon content decreases with the increasing of silicon content in silicon phases. Second, the carbon content has no obvious trend in ferrosilicon phases. Third, the carbon element can be formed as silicon carbide ...

    • Carbon cathode wear in aluminium electrolysis cells 

      Senanu, Samuel; Wang, Zhaohui; Ratvik, Arne Petter; Grande, Tor (Journal article; Peer reviewed, 2019)
      Autopsies of six spent potlinings with different carbon cathode block grades, amperage regimes and cell technologies were conducted at three separate smelters to reveal possible mechanisms causing cathode wear. Microstructure ...

    • 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 ...

    • Carbon Cones as Negative Electrode Material in Lithium- Ion Batteries 

      Onsrud, Morten (Doktoravhandlinger ved NTNU, 1503-8181; 2012:244, Doctoral thesis, 2012)

    • Carbon Nano-Fibre Supported Electrocatalysts for Fuel Cells 

      Briskeby, Stein Trygve (Doktoravhandlinger ved NTNU, 1503-8181; 2012:294, Doctoral thesis, 2012)
      This thesis covers topics related to fuel cell electrocatalyst preparation and electrochemical characterization. In particular, the influence of catalyst support material for Pt catalysts is examined in detail. The aim is ...

    • Carbon Nanocones as Electrode Material in Lithium Ion Batteries 

      Nagell, Marius Uv (Master thesis, 2011)
      A carbon powder containing carbon nanocones was used as an anode material in lithium ion batteries. The powder was also treated in different ways, chemically, with microwaves, and with heat. The carbon powder was tape ...

    • Carbon segregation at Σ3 {112} grain boundaries in silicon 

      Zhao, Dongdong; Li, Yanjun (Journal article; Peer reviewed, 2018)
      First-principles calculations were carried out to systematically investigate the carbon segregation along Σ3 {1 1 2} grain boundaries (GBs) in silicon. The energetically favorable segregation sites and corresponding ...

    • Carbon-polymer composite coatings for PEM fuel cell bipolar plates 

      Husby, Hans; Kongstein, Ole Edvard; Ødegård, Anders; Seland, Frode (Journal article; Peer reviewed, 2014)
      A carbon-polymer composite coating on stainless steel 316L substrates was investigated for the use as bipolar plate material for polymer electrolyte membrane fuel cells. The coating consisted of 45 vol% graphite, 5 vol% ...

    • Carbon-sulfur bond cleavage during adsorption of octadecane thiol to copper in ethanol 

      Rechmann, Julian; Krzywiecki, Maciej; Erbe, Andreas (Journal article; Peer reviewed, 2019)
      The effect of the solvent on the formation of thiol self-assembled monolayers (SAMs) on oxide-covered, reactive metals is more involved than in the well-studied gold–thiol system. In this work, copper covered with a native ...

    • Carbon-Supported Nanostructured Core-Shell Catalysts for Low Temperature Fuel Cells 

      Jensen, Mats (Master thesis, 2015)
      The direct methanol fuel cell needs a catalyst with low overpotential and high current density for methanol oxidation to be commerically viable. The catalyst with highest performance at the moment is the PtRu-alloy catalyst, ...

    • Carbon-supported Ru @ Pt Core-shell Catalyst for Low Temperature Fuel Cells 

      Ochal, Piotr (Doktoravhandlinger ved NTNU, 1503-8181; 2012:33, Doctoral thesis, 2012)
      A novel synthesis route for the manufacturing of Ru@Pt core-shell nanoparticles (NPs) originating from the University of Maryland, USA, was reproduced and adapted for electrochemical purposes in our laboratories at NTNU. ...

    • Case Hardening of Hardox 450 Steel for Increased Ballistic Strength 

      Buberg, Tor Arne (Master thesis, 2011)
      AbstractSteel alloys are the material that is most used in protective constructions today. The reason is the overall good properties of steels, with its high strength and hardness, high ductility, high formability and ...

    • Cathode Wear Based on Autopsy of a Shutdown Aluminium Electrolysis Cell 

      Senanu, Samuel; Schøning, Christian; Rørvik, Stein; Wang, Zhaohui; Ratvik, Arne Petter; Grande, Tor (Journal article; Peer reviewed, 2016)
      To investigate cathode wear, an autopsy of a shutdown aluminium electrolysis cell was conducted. The original lining consisted of a fully impregnated and graphitized carbon block and the cell was shut down after 2461 days ...

    • Cathode Wear in Aluminium Electrolysis Cells 

      Senanu, Samuel (Doctoral theses at NTNU;2019:317, Doctoral thesis, 2019)
      The increasing global demand for aluminium has resulted in growing production of aluminium metal through increased production capacity and improvement of the electrolysis technology. This has caused a development towards ...

    • Cathode Wear in Electrowinning of Aluminum Investigated by a Laboratory Test Cell 

      Wang, Zhaohui; Nobakhtghalati, Saeid; Støre, Anne; Solheim, Asbjørn; Tschöpe, Kati; Ratvik, Arne Petter; Grande, Tor (Journal article; Peer reviewed, 2016)
      The lifetime of an aluminum electrolysis cell is mainly determined by the cathode wear, especially for high amperage cells utilizing graphitized carbon cathodes. The cathode wear mechanisms are, however, complex and still ...

    • Cathode wear in Hall-Héroult cells 

      Østrem, Øyvind (Doktoravhandlinger ved NTNU, 1503-8181; 2013:34, Doctoral thesis, 2013)