Sökning: "thermal aging"

Visar resultat 21 - 25 av 27 uppsatser innehållade orden thermal aging.

  1. 21. Heating Effect of Alternating Current on Lithium-IonBatteries at Subzero Temperatures

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Dieter Henz; [2017]
    Nyckelord :;

    Sammanfattning : Electrification of transport is a distinct goal of many authorities. Electric vehicles are locally emission-free and can help to improve the air quality in cities. Despite several stimuli to promote electric vehicles, customers do not accept them at the desired level. One reason is the poor ratio between driving range and purchase cost. LÄS MER

  3. 22. Feasibility Study for a Cast Steel Guideline

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Mimmi Härdeman; [2015]
    Nyckelord :Cast steel; cast steel guideline; cast stainless steel; structural components; casting; high temperature materials; heat treatments; Gjutstål; gjutståls guideline; gjutna i rostfritt stål; strukturella komponenter; gjutning; högtemperaturmaterial; värmebehandlingar;

    Sammanfattning : The present work was conducted at Scania CV AB and has as main goal to produce a cast steel guideline. There is a great need to conduct a cast steel guideline, in order to help designers in their process to choose suitable materials and methods to produce lightweight components with higher performance. LÄS MER

  4. 23. Synthesis of polycarbonate polymer electrolytes for lithium ion batteries and study of additives to raise the ionic conductivity

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Strukturkemi

    Författare :Jonas Andersson; [2015]
    Nyckelord :battery materials; polymer electrolyte; PTMC; poly trimethylenecarbonate ; LiTFSI; nanofillers; batterimaterial; polymerelektrolyt; PTMC; polytrimetylkarbonat; LiTFSI; nanofillers;

    Sammanfattning : Polymer electrolyte films based on poly(trimethylene carbonate) (PTMC) mixed with LiTFSI salt in different compositions were synthesized and investigated as electrolytes for lithium ion batteries, where the ionic conductivity is the most interesting material property. Electrochemical impedance spectroscopy (EIS) and DSC were used to measure the ionic conductivity and thermal properties, respectively. LÄS MER

  5. 24. Modellering av åldring av dieseloxidationskatalysatorer

    Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Filip Gruvnäs; [2015]
    Nyckelord :Diesel oxidation catalyst; Aging; NO oxidation; Equivalent thermal load; Sulfur;

    Sammanfattning : A conventional exhaust gas after treatment system (EATS) for the Euro VI legislation contains four different catalyst. The first two (particulate filter system) remove particulates and the last two (SCR system) remove nitrogen oxides (NOx). LÄS MER

  7. 25. Characterization of SiGe layers grown by Trisilane and Germane at low temperatures for BiCMOS application

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Carmine Cappetta; [2014]
    Nyckelord :;

    Sammanfattning : Low temperature epitaxy (LTE) of SiGe by chemical vapor deposition (CVD) has attracted dramatic attention during the last decade for CMOS and BiCMOS application. LTE relates to a temperature range of 350÷650 °C. LÄS MER