Sökning: "silicon-nitride"

Visar resultat 21 - 25 av 60 avhandlingar innehållade ordet silicon-nitride.

  1. 21. Grain Morphology and Intergranular Structure of Si3N4 and Al2O3 Based Ceramics

    Författare :Håkan Björklund; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; whiskers; stereology; electron microscopy; sintering; silicon nitride; quantitative microscopy; grain growth; ceramics; microstructure; aluminium oxide;

    Sammanfattning : This thesis concerns factors controlling the grain morphology in Si3N4 and Al2O3 based ceramics. The microstructures of the ceramics were characterized by scanning electron microscopy in combination with quantitative microscopy and stereologic methods. LÄS MER

  3. 22. Design and Characterization of SiN-based integrated optical components for Wavelength Division Multiplexing

    Författare :Alexander Caut; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; crosstalk; silicon nitride.; Mach-Zehnder interferometers; polarization; grating couplers; insertion loss; power splitters; arrayed waveguide gratings; silicon photonics;

    Sammanfattning : To follow the trend of the data traffic and to limit the size of the hyperscale data centers, communication solutions offering small footprint, low cost and low power consumption are needed. Optical interconnects used in data centers are mostly short reach (approximately 100 m) based on GaAs-based 850 nm vertical-cavity surface emitting lasers (VCSELs) and OM4 multimode fibers (MMF). LÄS MER

  4. 23. Aberration-Corrected Analytical Electron Microscopy of Transition Metal Nitride and Silicon Nitride Multilayers

    Författare :Amie Fallqvist; Per Persson; Lars Hultman; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Two multilayer thin films have been studied: TiN/SiNx and ZrN/SiNx. A double-corrected transmission electron microscope (TEM) was utilized for imaging and spectroscopy. Imaging was carried out in scanning mode (STEM) for all samples. LÄS MER

  5. 24. Silicon Carbide and Silicon Nitride Ceramics Based on Colloidal Processing and Sol-Gel Techniques

    Författare :Eva Lidén; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The work in this dissertation deals with the development of silicon carbide and silicon nitride-based materials using colloidal processing and sol-gel techniques. Special attention has been given to the optimization of the homogeneity in ceramic multicomponent systems. LÄS MER

  7. 25. Preparation of silicon nitride powder by carbothermal reduction of silica in a nitrogen atmosphere

    Författare :Magnus Ekelund; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER