Sökning: "grafitisering"

Hittade 4 uppsatser innehållade ordet grafitisering.

  1. 1. Application of ring statistics to characterise graphitisation of carbon fiber heat shields under atmospheric re-entry conditions

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Hamish Keay; [2023]
    Nyckelord :Aerospace; Heat shields; Re-entry; Graphitisation; Carbon fiber; Carbon phenolic; Ring statistics; Graph theory; Molecular Dynamics; återinträde; grafitisering; kolfiber; kolfenol; ringstatistik; grafteori; molekylär dynamik;

    Sammanfattning : Carbon fibers submitted to high temperatures (>2000 °C) experience a permanent increasein their thermal conductivity. This change has been attributed to a change in the molecularstructure due to graphitisation. LÄS MER

  3. 2. Catalytic Graphitization of Biomass : For the Production of Graphite Materials

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Daniel Andersson; André Brunnberg; Emil Lind; [2021]
    Nyckelord :;

    Sammanfattning : In recent years the material graphite has been heavily studied since its use in widespread applications have increased, for example batteries, vehicles, and solar cells. When the need for this type of material increases the efficiency and the sustainability of the production methods must be taken into consideration. LÄS MER

  4. 3. Iron-catalyzed graphitization of biochar to produce graphitic carbon materials

    Master-uppsats, KTH/Materialvetenskap

    Författare :Ziyi Shi; [2021]
    Nyckelord :graphite; biochar; catalyst; catalytic graphitization; grafit; biokol; katalysator; katalytisk grafitisering;

    Sammanfattning : Demand for high-quality graphite is expected to experience an extraordinary growth rate, in large part due to its wide range of industrial applications such as adsorbents, lubricants, electrodes, etc. This thesis developed a novel sustainable approach to produce green-graphite materials by applying biochar, acarbon-rich valuable by-product obtained from biomass, as a carbon precursor. LÄS MER

  5. 4. Upgrade of the Graphitization System for 14C AMS Analyses

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen

    Författare :Philip Dalsbecker; [2013]
    Nyckelord :14C; AMS; Accelerator mass spectrometry; radiocarbon; vacuum; carbon-14; Physics and Astronomy;

    Sammanfattning : For decades, accelerator mass spectrometry (AMS) has been used for radiocarbon dating. The background of this technique is outlined along with an in-depth look at the graphitization process used to prepare samples for AMS analysis. LÄS MER