Sökning: "Dielectric Spectroscopy"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden Dielectric Spectroscopy.

  1. 1. Dielectric properties of ion-exchanged electrotechnical insulation papers : A study on the properties of novel papers

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Dan Selsmark; [2023]
    Nyckelord :Paper insulation; Frequency Domain Spectroscopy; Dielectric response; Karl Fischer titration; Dielectrics; Pappersisolering; Frekvensdomänsspektroskopi; Dielektrisk respons; Karl Fischer titrering; Dielektrika;

    Sammanfattning : Electrical insulation papers are a widely used group of papers in insulation applications and has been used for more than 100 years. Common applications include use as the dielectric medium in capacitors and insulation material in cables, bushings and transformers. LÄS MER

  3. 2. Dielectric properties of soda-lime silicate glass doped with TiO2

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets fysik

    Författare :Philip Sandell; [2020]
    Nyckelord :impedance spectroscopy; soda-lime; silicate; glass; titanium dioxide; dielectric;

    Sammanfattning : A survey of the dielectric properties of TiO2 doped soda-lime silicate is presented. Impedance spectroscopy was used with measurements conducted in a temperature range from 298 K to 623 K and frequencies between 10-2 and 106 Hz. LÄS MER

  4. 3. A quantum chemical study of electronic circular dichroism in alanine oligopeptides

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Thomas Agrenius Gustafsson; [2018]
    Nyckelord :;

    Sammanfattning : Circular dichroism (CD) spectroscopy, exploiting the wavelength-dependentdifferential absorption of left- and right-handed circularly polarized light, isa popular method of protein characterization. Theoretically computed CDspectra from quantum mechanical computer models of peptides can widen theapplicability of the method. LÄS MER

  5. 4. Optical spectroscopy of impurity atoms in semiconducting Nanowires

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Shishir Shroff; [2017]
    Nyckelord :Photoluminescence; Nanowire; Defects; Diffusion; GaAs; Copper; Physics and Astronomy;

    Sammanfattning : In a small and confined one dimensional geometry of nanowire, even few defects can influence the performance of the devices. Main objective of this thesis is to conduct photoluminescence study of such defect states in GaAs nanowires, which we will first introduce by diffusing copper impurity atoms, in very low concentrations. LÄS MER

  7. 5. Electrochemical etching and anodizing as key stages of surface treatment of aluminium foil for electrolytic capacitor industry : Application of Electro Chemical Impedance Spectroscopy as non-destructive characterization of etched anode foil with an anodized dielectric oxide layer

    Master-uppsats, Högskolan i Jönköping/JTH, Produktutveckling; Högskolan i Jönköping/JTH, Material och tillverkning

    Författare :Harish Appusamy Boopathy; Pavan Kumar Bonthala; [2017]
    Nyckelord :Surface treatment of aluminum foil for electrolytic capacitor; Anodic oxide forming process; Electro chemical etching; Electrochemical impedance spectroscopy EIS ; Capacitance measurement;

    Sammanfattning : In the initial stage, the sample preparation was done by using the techniques of Anodic etching and anodic forming processes where a repeated trial and error method of sample preparation headed towards making out a suitable sample set for characterization. After this step, the set of 2 different industrial samples were introduced and anodic oxide forming process was carried out in different electrolytes. LÄS MER