Sökning: "solid oxide"

Visar resultat 1 - 5 av 230 avhandlingar innehållade orden solid oxide.

  1. 1. The Buried Oxide of Silicon on Insulator Materials

    Detta är en avhandling från Chalmers University of Technology

    Författare :Per Ericsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fysik; Physics; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; silicon on insulator; SOI; buried oxide; oxide defects; wafer bonding; internal oxidation; aluminum oxide;

    Sammanfattning : The buried oxide of silicon on insulator (SOI) wafers plays an important role in the operation of electronic devices made on such materials. The presence of defects in the buried oxide can seriously degrade the performance of a circuit. LÄS MER

  2. 2. Screening of oxygen-carrier particles based on iron-, manganese-, copper- and nickel oxides for use in chemical-looping technologies

    Detta är en avhandling från Chalmers University of Technology

    Författare :Marcus Johansson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemi; Chemistry; Kemiteknik; Chemical engineering; Chemical-Looping Combustion; Chemical-Looping Reforming; Oxygen Carrier; Carbon Dioxide Capture; Nickel Oxide; Copper Oxide; Manganese Oxide; Iron Oxide;

    Sammanfattning : Capture and storage of carbon dioxide from combustion will likely be used in the future as a method of reducing emissions of greenhouse gases and thus be part of the overall strategy to stabilize the atmospheric levels of CO2. Chemical-looping combustion is a method of combustion where CO2 is inherently separated from the non-condensable components in the flue gas without the need for an energy intensive air separation unit. LÄS MER

  3. 3. Electrical Characterization of Metal-Oxide-Silicon Structures with Ultra Thin Oxide Layers

    Detta är en avhandling från Chalmers University of Technology

    Författare :Per Lundgren; Chalmers tekniska högskola.; Chalmers University of Technology.; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fysik; Physics; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; MOS; MTOS; tunneling; PMA; oxide defects;

    Sammanfattning : Metal-oxide-semiconductor (MOS) structures with very thin (2 - 4 nm) oxide layers thermally grown on silicon have been electrically characterized regarding oxide and interface defects and concerning the direct tunnel current through the oxide. This thesis comprises eight papers which deal with the appearance of oxide charge during electrical stress (papers A, D, E), the beneficial effect on the defect density of low-temperature (up to 350 °C) post-metallization annealing (PMA) (paper A, B, C, G), and the effect of temperature and choice of metal for the tunnel current (paper F, H). LÄS MER

  4. 4. Point defects and ion conduction in solid oxides: a first-principles case study of La2Zr2O7

    Detta är en avhandling från Chalmers University of Technology

    Författare :B. Joakim Nyman; Chalmers tekniska högskola.; Chalmers University of Technology.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kondenserade materiens fysik; Condensed matter physics; Defekter och diffusion; Defects and diffusion; Elektronstruktur; Electronic structure; Halvledarfysik; Semiconductor physics; hydrogen economy; hydrogen; fuel cell; solid oxide fuel cell; SOFC; ceramic electrolyte; ion conduction; point defect; acceptor doping; charge compensation; self compensation; oxygen vacancy; proton; trapping; defect cluster; solid oxide; pyrochlore; lanthanum zirconate; La2Zr2O7; computational methods; first principles; DFT;

    Sammanfattning : In the endeavor to attain a clean environment and sustainable energy consumption, the notion of a future hydrogen economy stands out as one of the grandest visions. Striving for this vision, a critical task lies in optimizing the performance of the fuel-cell devices responsible for extracting electric power from the energy stored in hydrogen molecules. LÄS MER

  5. 5. Atomic Layer Deposition of Copper, Copper(I) Oxide and Copper(I) Nitride on Oxide Substrates

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Tobias Törndahl; Uppsala universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; Atomic Layer Deposition; ALD; copper; copper I oxide; copper I nitride; deposition pathway; CuCl; Cu hfac 2; oxide substrates; epitaxy; DFT; ab-initio; Oorganisk kemi; NATURAL SCIENCES Chemistry Inorganic chemistry; NATURVETENSKAP Kemi Oorganisk kemi;

    Sammanfattning : Thin films play an important role in science and technology today. By combining different materials, properties for specific applications can be optimised. LÄS MER