Browsing NTNU Open by Author "Bittner, Michael"

Now showing items 1-6 of 6

    • A comprehensive study on improved power materials for high-temperature thermoelectric generators 

      Bittner, Michael; Kanas, Nikola; Hinterding, Richard; Steinbach, Frank; Räthel, Jan; Schrade, Mattias; Wiik, Kjell; Einarsrud, Mari-Ann; Feldhoff, Armin (Journal article; Peer reviewed, 2019)
      Dense Ca3Co4O9-NaxCoO2-Bi2Ca2Co2O9 (CCO-NCO-BCCO) nanocomposites were produced from sol-gel derived Ca2.25Na0.3Bi0.35Tb0.1Co4O9 powder by four methods: Hot-pressing (HP), spark plasma sintering (SPS) and pressureless ...

    • All-oxide thermoelectric module with in situ formed non-rectifying complex p-p-n junction and transverse thermoelectric effect 

      Kanas, Nikola; Bittner, Michael; Desissa, Temesgen Debelo; Singh, Sathya Prakash; Norby, Truls Eivind; Feldhoff, Armin; Grande, Tor; Wiik, Kjell; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2018)
      All-oxide thermoelectric modules for energy harvesting are attractive due to high temperature stability, low cost, and the potential to use non-scarce and non-toxic elements. Thermoelectric modules are mostly fabricated ...

    • Hydroxyl airglow observations for investigating atmospheric dynamics: Results and challenges 

      Wüst, Sabine; Bittner, Michael; Espy, Patrick Joseph; French, W. John R.; Mulligan, Frank J. (Peer reviewed; Journal article, 2023)
      Measurements of hydroxyl (OH*) airglow intensity are a straightforward and cost-efficient method which allows the derivation of information about the climate and dynamics of the upper mesosphere/lower thermosphere (UMLT) ...

    • Influence of processing on stability, microstructure and thermoelectric properties of Ca3Co4-xO9+δ 

      Kanas, Nikola; Singh, Sathya Prakash; Rotan, Magnus; saleemi, Mohsin; Bittner, Michael; Feldhoff, Armin; Norby, Truls Eivind; Wiik, Kjell; Grande, Tor (Journal article; Peer reviewed, 2018)
      Due to high figure of merit, Ca3Co4-xO9+δ (CCO) has potential as p-type material for high-temperature thermoelectrics. Here, the influence of processing including solid state sintering, spark plasma sintering and ...

    • Traveling planetary wave activity from mesopause region airglow temperatures determined by the Network for the Detection of Mesospheric Change (NDMC) 

      Reisin, Esteban R.; Scheer, Jürgen; Dyrland, Margit Elisabet; Sigernes, Fred; Deehr, Charles Sterling; Schmidt, Carsten H.; Höppner, Kathrin; Bittner, Michael; Ammosov, Petr P.; Gavrilyeva, Galina A.; Stegman, Jacek; Perminov, Vladimir I.; Semenov, Anatoly I.; Knieling, Peter; Koppmann, Ralf; Shiokawa, Kazuo; Lowe, Robert P.; López-González, Maria J.; Rodriguez, Eloy; Zhao, Yucheng; Taylor, Michael John; Buriti, Ricardo Arlen; Espy, Patrick Joseph; French, W. John R.; Eichmann, Kai Uwe; Burrows, John Philip; von Savigny, Christian H.P. (Journal article; Peer reviewed, 2014)
      The global distribution of traveling planetary wave (PW) activity in the mesopause region is estimated for the first time from ground-based airglow measurements. Monthly and total mean climatologies of PW power are determined ...

    • Triple-phase ceramic 2D nanocomposite with enhanced thermoelectric properties 

      Bittner, Michael; Kanas, Nikola; Hinterding, Richard; Steinbach, Frank; Groeneveld, Dennis; Wemhoff, Piotr; Wiik, Kjell; Einarsrud, Mari-Ann; Feldhoff, Armin (Journal article; Peer reviewed, 2019)
      A thermoelectric triple-phase p-type Ca3Co4O9-NaxCoO2-Bi2Ca2Co2O9 (CCO–NCO–BCCO) 2D nanocomposite was obtained from pressureless sintering in air. The anisotropic thermoelectric properties of the nanocomposite exhibit a ...