Sökning: "sol-gel"

Visar resultat 26 - 30 av 59 avhandlingar innehållade ordet sol-gel.

  1. 26. Synthesis–Structure–Property Relationships in Li- and Mn-rich Layered Oxides

    Författare :Ashok S. Menon; William Brant; Montserrat Casas-Cabanas; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Li- and Mn-rich layered oxides; Li-ion battery cathode materials; synthesis–property relationships; stacking faults; anionic redox materials;

    Sammanfattning : The commercialisation of Li-ion batteries over the last decade has provided additional impetus for the improvement of existing energy storage technologies. Towards this, a major portion of the global efforts includes exploratory research aimed at the development of new material chemistries. LÄS MER

  3. 27. Process and properties of continuous fibers based on cellulose nanocrystals and nanofibers

    Författare :Saleh Hooshmand; Tekla Tammelin; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Trä och bionanokompositer; Wood and Bionanocomposites;

    Sammanfattning : In recent years, composites made from natural fibers based on cellulose have received increasing attention since they have a low environmental impact and good mechanical properties. However, these fibers are short and discontinuous and the conventional spinning techniques used for these fibers results in continuous yarns with mechanical properties considerably lower than that of the single fibers. LÄS MER

  4. 28. Colloidal Synthesis and Characterisation of (a) Na0.5K0.5NbO3 Thin Films; and (b) Functionalised Gd2O3 Nanocrystals

    Författare :Fredrik Söderlind; Per-Olov Käll; Lars Ojamäe; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : (a) Thin films of the perovskite structured Na0.5K0.5NbO3 (NKN) have been synthesised with several different sol-gel methods. Only one method gave pure NKN phase while the other methods gave extra peaks in the x-ray diffraction patterns, indicating that other, unidentified, phases were present. LÄS MER

  5. 29. Colloidal synthesis of metal oxide nanocrystals and thin films

    Författare :Fredrik Söderlind; Per-Olov Käll; Kajsa Uvdal; Mats Johnsson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanoparticles; synthesis; contrast agents; functionalization; thin films; Chemistry; Kemi;

    Sammanfattning : A main driving force behind the recent years’ immense interest in nanoscience and nanotechnology is the possibility of achieving new material properties and functionalities within, e.g., material physics, biomedicine, sensor technology, chemical catalysis, energy storing systems, and so on. LÄS MER

  7. 30. Processing of continuous fibers based on nanocellulose: Influence of dispersion and orientation on mechanical properties

    Författare :Saleh Hooshmand; Stephen Eichhorn; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Trä och bionanokompositer; Wood and Bionanocomposites;

    Sammanfattning : The aim of the work was to prepare continuous bio-based fibers where nano-sized cellulose was used to improve the mechanical properties. Two different strategies were used to reach this aim, melt-spinning of thermoplastic fibers reinforced with nanocellulose and dry-spinning of cellulose nanofibers without solvent or chemicals. LÄS MER