Blar i Institutt for materialteknologi på tittel

Viser treff 1333-1352 av 2509

    • Lifetime degradation in n-type Cz-Si 

      Koien, Vivian Sporstøl (Master thesis, 2012)
      The main object was to investigate the effect of donors, thermal donors and defects on the lifetime on n-type Czochralsky (Cz) silicon. Cz is a technique for making monocrystals by dipping a monocrystalline seed into the ...

    • Ligand Field-Induced Exotic Dopant for Infrared Transparent Electrode: W in Rutile SnO2 

      Fukumoto, Michitaka; Yasushi, Hirose; Williamson, Benjamin; Nakao, Shoichiro; Kimura, Koji; Hayashi, Koichi; Sugisawa, Yuki; Sekiba, Daiichiro; Scanlon, David; Hasegawa, Tetsuya (Journal article, 2021)
      Transparent conductive oxides (TCOs) exhibiting high near-infrared (NIR) transmittance are one of the key materials for highly efficient thin-film solar cells with widened spectral sensitivity. To realize excellent NIR ...

    • Light-weight materials produced by accumulative roll bonding 

      Govindaraj, Nagaraj Vinayagam (Doktoravhandlinger ved NTNU, 1503-8181; 2013:114, Doctoral thesis, 2013)
      The work presented in this thesis is an experimental study of roll bonding and accumulative roll bonding of similar and dissimilar metal combinations with special focus on bond strength evaluation, post process heat ...

    • Limitations of Ultrathin Al2O3 Coatings on LNMO Cathodes 

      Østli, Elise Ramleth; Tesfamhret, Yonas; Wenner, Sigurd; Lacey, Matthew J.; Brandell, Daniel; Svensson, Ann Mari; Selbach, Sverre Magnus; Wagner, Nils P. (Peer reviewed; Journal article, 2021)
      This study demonstrates the application of Al2O3 coatings for the high-voltage cathode material LiNi0.5–xMn1.5+xO4−δ (LNMO) by atomic layer deposition. The ultrathin and uniform coatings (0.6–1.7 nm) were deposited on LNMO ...

    • Limiting Current Density of Oxygen Reduction under Ultrathin Electrolyte Layers: From the Micrometer Range to Monolayers 

      Zhong, Xiankang; Schulz, Matthias; Wu, Chun-Hung; Rabe, Martin; Erbe, Andreas; Rohwerder, Michael (Peer reviewed; Journal article, 2021)
      The oxygen reduction reaction (ORR) under ultrathin electrolyte layers is a key reaction in many processes, from atmospheric corrosion to energy conversion in fuel cells. However, the ORR current under ultrathin electrolyte ...

    • Linking mechanical properties to precipitate microstructure in three Al-Mg-Si(-Cu) alloys 

      Sunde, Jonas Kristoffer; Lu, Feng; Marioara, Calin Daniel; Holmedal, Bjørn; Holmestad, Randi (Peer reviewed; Journal article, 2021)
      The mechanical properties of age hardenable Al alloys depend strongly on the precipitate microstructure. This work has investigated the relationship between properties such as strength and ductility and the distribution ...

    • Lipase Catalysed Kinetic Resolution of Stiripentol 

      Jacobsen, Elisabeth Egholm; Anthonsen, Thorleif; El-Behairy, Mohammed Farrag; Sundby, Eirik; Aboul-Enein, Mohamed Nabil; Attia, Mohamed Ibrahim; El-Azzouny, Aida Abd El-Sattar; Amin, Kamilia M.; Abdel-Rehim, Mohamed (Journal article; Peer reviewed, 2012)
      Kinetic resolution of rac-Stiripentol, catalysed by lipase A from Candida antarctica by esterification with vinyl butanoate was performed with an E-value of 24. This allowed isolation of (3S)-Stiripentol with an ee of 86 ...

    • Liquid feed flame spray pyrolysis as alternative synthesis for electrochemically active nanosized Li2MnSiO4 

      Wagner, Nils Peter; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2016)
      A novel liquid-feed flame spray pyrolysis synthesis with reducing post-heat treatment yielding highly phase pure nano-sized and carbon-coated Li2MnSiO4 is reported. In contrast to most reported Li2MnSiO4 synthesis routes, ...

    • Liquid Oxygen Compatibility of Materials for High-Performance Rocket Propellant Pumps 

      Kruse, Max; Couto, Sara Patricia Pereira (Bachelor thesis, 2021)
      Det ble undersøkt om det er gjennomførbart å utvikle en elektrisk pumpe for flytende oksygen i små bæreraketter, uten tetning mellom impeller og motor. Flytende oksygen er et kraftig oksidasjonsmiddel, som kan føre til ...

    • Liquid Permeability of Ceramic Foam Filters 

      Zhang, Kexu (Master thesis, 2012)
      This project is in support of the PhD project: Removal of Inclusions from Liquid Aluminium using Electromagnetically Modified Filtration . The purpose of this project was to measure the tortuosity, and permeability of ...

    • Liquidus relations and thermochemistry within the system Fe-Mn-C-O 

      Fenstad, Jo (Dr. ingeniøravhandling, 0809-103X; 2000:126, Doctoral thesis, 2000)
      The ever-growing competition in the bulk material industry is increasingly a battle between branches of materials producers rather than within each branch. In this climate, an enduring competitiveness relies on continous ...

    • Liquinert quartz crucible - Removal of OH groups in silica crucibles to reduce wetting between the crucible and the silicon melt 

      Strømmen, Mathias (Master thesis, 2018)
      When producing monocrystalline silicon ingots for the solar cell industry quartz crucibles are most commonly used. A quartz crucible used in the Czochralski (CZ) process will be used to pull ingots for more than 100 hours. ...

    • Literature review on Nitrosamines – Formation, Health and Environmental Impact and the Ways of Monitoring and Analysis 

      Smalberget, Kristin (Bachelor thesis, 2021)
      International Agency for Research on Cancer (IARC) har klassifisert mer enn 10 nitrosaminer som kreftfremkallende, sannsynligvis eller muligens kreftfremkallende for mennesker. Sekundære nitrosaminer er stabile forbindelser ...

    • Lithium bis (fluorosulfonyl) imide as electrolyte salt for high-content silicon-based anodes for Li-ion batterier 

      Asheim, Karina (Doctoral theses at NTNU;2021:413, Doctoral thesis, 2021)
      Li-ion batteries have become the superior rechargeable battery technology due to high energy density, long cycle life, safety and cost. Several materials can be used for the electrodes and the electrolyte, enabling ...

    • Lithium cations mobility in a coarse-grained polymer embedded with Lennard Jones particles using non-equilibrium molecular dynamics 

      Zhao, Anqi (Master thesis, 2022)
      Kompositt faststoffelektrolytter er lovende alternativer til de eksisterende flytende elektrolyttene i litium-batterier fordi de kan brukes med litium-metall som anode. Hovedproblemet med slike polymer-baserte faste ...

    • Lithium dendrites in solid-state batteries - Where they come from and how to mitigate them 

      Flatscher, Florian (Doctoral theses at NTNU;2023:382, Doctoral thesis, 2023)
      A major contributor to global CO2 emissions is transportation and a transition to electric vehicles could lead to a significant reduction of those emissions. A roadblock in this transition are safety issues of electric ...

    • Local and average structure of Mn- and La-substituted BiFeO3 

      Jiang, Bo; Selbach, Sverre Magnus (Journal article; Peer reviewed, 2017)
      The local and average structure of solid solutions of the multiferroic perovskite BiFeO3 is investigated by synchrotron X-ray diffraction (XRD) and electron density functional theory (DFT) calculations. The average ...

    • Local control of improper ferroelectric domains in YMnO 3 

      Kuerten, Lukas; Krohns, Stephan; Schoenherr, Peggy; Holeczek, Katharina; Pomjakushina, Ekaterina; Lottermoser, Thomas; Trassin, Morgan; Meier, Dennis Gerhard; Fiebig, Manfred (Peer reviewed; Journal article, 2020)
      Improper ferroelectrics are described by two order parameters: a primary one, driving a transition to long-range distortive, magnetic, or otherwise nonelectric order, and the electric polarization, which is induced by the ...

    • Local dynamics of topological magnetic defects in the itinerant helimagnet FeGe 

      Dussaux, Antoine; Schoenherr, Peggy; Koumpouras, Konstantinos; Chico, Jonathan; Chang, Kevin; Lorenzelli, Luca; Kanazawa, Naoya; Tokura, Yoshinori; Garst, Markus; Bergman, Anders; Degen, Christian L.; Meier, Dennis (Journal article; Peer reviewed, 2016)
      Chiral magnetic interactions induce complex spin textures including helical and conical spin spirals, as well as particle-like objects such as magnetic skyrmions and merons. These spin textures are the basis for innovative ...

    • Local electric-field control of multiferroic spin-spiral domains in TbMnO3 

      Schoenherr, Peggy; Manz, Sebastian; Kuerten, Lukas; Shapovalov, Konstantin; Iyama, Ayato; Kimura, Tsuyoshi; Fiebig, Manfred; Meier, Dennis Gerhard (Journal article, 2020)
      Spin-spiral multiferroics exhibit a magnetoelectric coupling effects, leading to the formation of hybrid domains with inseparably entangled ferroelectric and antiferromagnetic order parameters. Due to this strong magnetoelectric ...