Search for dissertations about: "in situ diffraction"

Showing result 16 - 20 of 141 swedish dissertations containing the words in situ diffraction.

  2. 16. Lithium-ion insertion in a V6O13 cathode

    Author : Örjan Bergström; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; cathode material; vanadium oxide; lithium insertion; in situ X-ray diffraction; deformation electron density refinement; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : The transition metal oxide V6O13 is a promising cathode material for high-capacity lithium-polymer batteries in conjunction with a lithium-metal anode. The electro-chemical behaviour of V6O13 has its origin in the ability of the vanadium ions to change their-oxidation states, combined with the open nature of its crystal structure which allows lithium ions to diffuse through it. READ MORE

  4. 17. The Role of Interfacial Microstructure of Perovskite Thin FIlms - A High Resolution and In Situ Study

    Author : Johan Börjesson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; KTO; STO; Perovskites; thin film; interfaces; SRO; microstructure; HAADF STEM; TEM; in situ TEM; LAO;

    Abstract : Perovskite based materials have recently shown to have many unique properties that make them suitable for future electronic devices. In this thesis, the role of the interfacial microstructure on the properties of perovskite thin film heterostructures has been investigated. READ MORE

  5. 18. Environmental Monitoring - using diode-laser-based spectroscopic techniques

    Author : Gabriel Somesfalean; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Diode-laser spectroscopy; frequency-modulation spectroscopy; frequency conversion; diffraction; scattering; Electromagnetism; acoustics; akustik; optik; absorption spectroscopy; Elektromagnetism; optics; Fysicumarkivet A:2004:Somesfalean;

    Abstract : Monitoring of environmental gases is necessary to understand the complex processes governing global warming and the impact of pollutant emissions related to human activity. Diode-laser-based spectroscopic techniques, being robust and affordable, have a great potential to become an industrially well-established technology for environmental sensing. READ MORE

  6. 19. Deformation mechanisms and load distribution in multi-phase engineering materials

    Author : Nitesh Raj Jaladurgam; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Deformation mechanisms; Electron microscopy; Eutectic high entropy alloys; Load distribution; Superalloys; In-situ neutron diffraction;

    Abstract : While the transition to carbon neutral technologies is still in progress, it is vital to reduce the environmental impact of existing processes. The efficiency of combustion processes for e.g. power generation and aviation can be greatly improved by increasing the operating temperature. READ MORE

  7. 20. Proton Conducting Ceramics; Synthesis, Characterization and Sample Cell Environments

    Author : FRANCIS GACHAO KINYANJUI; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; perovskites; neutron diffraction; Rietveld refinements; BaSnO3; in-situ cell; deuteron position; proton conduction; BaZrO3;

    Abstract : Acceptor doped Perovskite ceramics have been shown to exhibit high levels of protonic conduction in humid atmospheres. However significant grain boundary resistance and long sintering times required to achieve sufficient grain size growth has hindered their widespread application as electrolyzers, fuel cells and gas separation membranes. READ MORE