Now showing items 119-138 of 1610

    • B diffusion in slag during slag refining for solar grade silicon 

      Zhang, Shuang (Master thesis, 2011)
      Mass transfer rate of B during slag refining has been investigated in the resistance tube furnace at temperature 1600 ºC and the mass transfer coefficients of B have been determined. The values of mass transfer coefficients ...
    • B-cation ordering and dielectric properties of relaxor ferroelectric Pb(Sc1/2Nb1/2)O3 

      Baazi, Jonas Said (Master thesis, 2013)
      Molten salt synthesis and solid state synthesis were used to make relaxor ferroelectric Pb(Sc1/2Nb1/2)O3,abbreviated PSN in most literature. Many studies have previously been conducted on this material to obtain so called ...
    • Barrier Oxide Growth and Dissolution on Aluminium in Aqueous Media 

      Giskeødegård, Nils Håvard (Doctoral theses at NTNU;2016:326, Doctoral thesis, 2016)
      The oxide formed during anodization of aluminium has been a subject of attention since the beginning of the 20th century, due to its protective properties. The oxide consists of two layers, a dense layer adjacent to the ...
    • Bauschinger effect modelled by yield surface distortions 

      Holmedal, Bjørn (Journal article; Peer reviewed, 2019)
      A model for distorting the yield surface by flattening the part in the reverse of the loading direction, is suggested. As the basis for the distortion, the model applies a pair of second-order back-stress tensors of similar ...
    • Behaviour of Aluminium Carbide in Al-melts during Re-melting 

      Gökelma, Mertol; Aarnæs, Trygve Storm; Maier, Jürgen; Friedrich, Bernd; Tranell, Gabriella (Journal article; Peer reviewed, 2019)
      The presence of non-metallic inclusions in aluminium has become a more critical issue with increasing demands on surface quality and low final wall thicknesses of products. Aluminium carbide particles form during the primary ...
    • Behaviour of iron and titanium species in cryolite-alumina melts 

      Jentoftsen, Trond Eirik (Dr.ingeniøravhandling, 0809-103X; 2000:118, Doctoral thesis, 2000)
      The solubility of divalent iron oxide in cryolite-based melts was studied. Both electrochemical and chemical techniques were employed. To ensure that only divalent iron was present in solution, the melt was contained in ...
    • Behaviour of the slip-cast crucible as a contamination source during silicon directional solidification 

      Skarstad, Hanna Vaksvik (Master thesis, 2016)
      In this work the behaviour of the slip-cast crucible as a contamination source of multicrystalline silicon during directional solidification (DS) was investigated. Transport parameters of iron were estimated in two types ...
    • Bending ductility and through thickness anisotropy in 6xxx extruded profiles 

      Li, Yongpeng (Master thesis, 2013)
      6xxx aluminium alloy extruded profiles are widely used in the automotive bumper systems due to light weight, high strength and good ductility. Bending ductility dominates the behavior of bumper systems to absorb energy in ...
    • Bi vacancy formation in BiFeO3 epitaxial thin films under compressive (001)-strain from first principles 

      Xia, Lu; Tybell, Thomas; Selbach, Sverre Magnus (Peer reviewed; Journal article, 2019)
      Point defects in BiFeO3 affect both structural and functional properties. To elucidate the role of single Bi vacancies and Bi–O vacancy pairs we investigate their stability and effect on structural and ferroelectric ...
    • Biaxial strength and slow crack growth in porous alumina with silica sintering aid 

      Bakken, Astrid; Wagner, Susanne; Hoffmann, Michael; Einarsrud, Mari-Ann; Grande, Tor; Thorstensen, Bernt (Journal article, 2018)
      Biaxial strength, fracture toughness and subcritical crack growth are reported for coarse grained porous alumina ceramics. The materials were prepared with a varying amount of a silica sintering aid, which resulted in the ...
    • Bifacial Solar Cells in Nordic Climate 

      Hansen, Siw Anita (Master thesis, 2018)
      Bifacial solar cells can be the new trend within photovoltaic (PV) technology. They have the ability to take advantage of not only the direct irradiance from the sunlight, but also the indirect light which is reflected by ...
    • Bimetallic Nano Electrocatalyst for HER in Alkaline Polymer Electrolysis 

      Faid, Alaa; Manikandan, Maidhily; Seland, Frode; Barnett, Alejandro; Sunde, Svein (Journal article; Peer reviewed, 2018)
      Ni and alloys of Ni (with Fe, Co, Mo) still represent the most suitable electrodes for HER in alkaline media. Bimetallic nanoparticles of NiFe and NiCo were fabricated by co-precipitation and thermal reduction by oleylamine. ...
    • Biocompatibility of (Ba,Ca)(Zr,Ti)O3 piezoelectric ceramics for bone replacement materials 

      Poon, Kara; Wurm, Matthias C.; Evans, Donald; Einarsrud, Mari-Ann; Lutz, Rainer; Glaum, Julia (Journal article; Peer reviewed, 2019)
      Total joint replacement implants are generally designed to physically mimic the biological environment to ensure compatibility with the host tissue. However, implant instability exposes patients to long recovery periods, ...
    • Biokarbon som reduksjonsmiddel i manganproduksjon 

      Braaten, Pauline Verula; Simonsen, Thomas Park (Bachelor thesis, 2020)
      Sammendraget kan ikke offentliggjøres på grunn av konfidensiell oppgave.
    • Biokarbon-engineering: forbedring av styrken til pellets 

      Chrobak, Lasse Svendsen; Værnes, Erlend Skjørstad (Bachelor thesis, 2019)
    • Bipolar Plates for PEM Systems 

      Lædre, Sigrid (Doctoral thesis at NTNU;2016:247, Doctoral thesis, 2016)
      Summary of thesis: The Bipolar Plate (BPP) is an important component in both Proton Exchange Membrane Fuel Cells (PEMFCs) and Proton Exchange Membrane Water Electrolyzers (PEMWEs). Bipolar plate material and processing ...
    • Black Silicon Structures 

      Juul, Maren Elise (Master thesis, 2018)
      Nanostructuring on the surface of silicon can make high efficient solar cells possible by lowering the reflection. Silicon wafers were successfully wet chemically etched with metal-assistance, to create a black silicon ...
    • Boron Removal from Silicon by Humidified Gases 

      Safarian-Dastjerdi, Jafar; Tang, Kai; Hildal, Kjetil; Tranell, Gabriella (Journal article; Peer reviewed, 2014)
      Boron (B) is one of the most problematic impurities to remove from metallurgical grade silicon in the production of more pure solar grade silicon (SoG-Si). In the present work, recent progresses in the application of ...
    • Boron Removal from Silicon by Moisturized Gases 

      Safarian, Jafar; Sana, Claudio; Tranell, Gabriella (Chapter, 2017)
      The photovoltaic (PV) industry is in rapid growth and a large supply of PV feedstock materials must be provided to maintain this growth. Since silicon is still the dominant material for the fabrication of solar cells, ...