Sökning: "THERMAL-STABILITY"

Visar resultat 21 - 25 av 257 avhandlingar innehållade ordet THERMAL-STABILITY.

  1. 21. Photosensitivity, chemical composition gratings and optical fiber based components

    Författare :Michael Fokine; KTH; []
    Nyckelord :optical fibers; fiber bragg gratings; photosensitivity; thermal stability; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : The different topics of this thesis include high-temperaturestable fiber Bragg gratings, photosensitivity and fiber basedcomponents. Fiber Bragg gratings (FBG) are wavelength dispersiverefractive index structures manufactured through UV exposure ofoptical fibers. LÄS MER

  3. 22. Physical vapor deposition and thermal stability of hard oxide coatings

    Författare :Ludvig Landälv; Per Eklund; Emmanuelle Göthelid; Björn Alling; Marcus Morstein; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The state-of-the-art tools for machining metals are primarily based on a metal-ceramic composite (WC-Co) coated with different combinations of carbide, nitride, and oxide coatings. Combinations of these coating materials are optimized to withstand specific wear conditions. LÄS MER

  4. 23. Water-assisted mixing and compression moulding of ethylene-acrylic acid copolymer reinforced with nano-cellulose

    Författare :Abhijit Venkatesh; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermal stability; cellulose nanocrystals; azetidinium; amphiphilic co-polymer; Nanocellulose; rheology; cellulose nanofibrils; water-assisted mixing.;

    Sammanfattning : The concerns regarding aspects of global warming, depleting oil resources, accumulation of plastics in landfills has served as motivation to move towards utilizing sustainable and renewable resources to fulfil our needs. In the present work, the reinforcing capabilities of cellulose nanofibrils (CNF) and modified/unmodified cellulose nanocrystals (CNC) based composites prepared through water-assisted mixing, drying and compression moulding was explored. LÄS MER

  5. 24. Synthesis and Characterization of New Inorganic Thermoelectric Materials

    Författare :Daniel Cederkrantz; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; thermal conductivity.; Ba8Ga16Ge30; Seebeck coefficient; nanoinclusions; Thermoelectricity; waste heat recovery; clathrates; thermal stability; electrical resistance; Mg2Si; substitution; semiconductors;

    Sammanfattning : With thermoelectric materials it is possible to convert a difference in temperature into electrical energy. This can be utilized for a more efficient use of available energy, eg. by converting waste heat from a combustion process. LÄS MER

  7. 25. Thermally Conductive High-Density Polyethylene Composites for Ground Heat Exchangers

    Författare :Adib Kalantar Mehrjerdi; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-density polyethylene; talc; thermal conductivity; thermal diffusivity; thermal stability; melt rheology; oxidation induction time; α relaxation; strain hardening;

    Sammanfattning : Today, the energy used for the heating and cooling of offices, shopping centres, schools, residential areas, andother buildings is as large as 50% of the total energy consumption in the world. The climate change, globalwarming, and environmental issues have forced high requirements for energy efficiency and clean energyproduction in buildings. LÄS MER