Sökning: "Yttrium"

Visar resultat 11 - 15 av 55 avhandlingar innehållade ordet Yttrium.

  1. 11. High temperature properties of polycrystalline Mo(Si,Al)2: compression and oxidation

    Författare :Aina Edgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hot compression; Mo Si; Al 2; microstructure; heating element; mechanical properties; oxidation;

    Sammanfattning : Electrification of industrial heating processes holds great promise for reducing CO2 emissions. Large furnaces operating at elevated temperatures and in demanding atmospheres are complicated but indeed important to electrify. LÄS MER

  3. 12. Synthesis of Yb:Y2O3 nanoparticles and fabrication of transparent polycrystalline yttria ceramics

    Författare :Johanne Mouzon; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materialteknik; Engineering Materials;

    Sammanfattning : More efficient laser materials are needed for space applications in order to save weight and make cost-savings. The fabrication of polycrystalline ceramic materials is a solution to obtain new compositions with better efficiency. LÄS MER

  4. 13. Tungsten-Based Nanocomposites by Chemical Methods

    Författare :Sverker Wahlberg; Muhammet S. Toprak; Håkan Engqvist; FNM Funktionella material KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Tungsten based-materials find use in many different fields of engineering, particularly in applications where good temperature and/or erosion resistance is important. Nanostructuring of tungsten composites is expected to dramatically improve the materials’ properties and enhancing the performance in present applications but also enabling totally new possibilities. LÄS MER

  5. 14. Crystallographic Studies of Ternary Chalcogenides and Organic Semiconductors

    Författare :Céline Besnard; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phase equilibria; Kondenserade materiens egenskaper:struktur; egenskaper termiska och mekaniska ; kristallografi; fasjämvikt; crystallography; thermal and mechanical properties; Condensed matter:stucture; thiazine derivatives; quinoline derivatives; hexacene-quinone; substituted tetracene; rubrene derivatives; manganese telluride; organic semiconductors; niobium sulfide intercalation compounds; thiospinel;

    Sammanfattning : X-ray diffraction methods have been used to study the crystal structure of different compounds, both organic and inorganic. The inorganic compounds were all synthesized by solid state reactions. A new compound, Re4As6S3, was synthesized and its structure was solved by Rietveld methods. LÄS MER

  7. 15. Studies of optical properties of lanthanide upconversion nanoparticles for emerging applications

    Författare :Qingyun Liu; Hans Ågren; Haichun Liu; Patricia Haro Gonzalez; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Upconversion nanoparticles; solar cells sensitization; near infrared photodetector; multiplex imaging; optical encoding; information technology; bioimaging; rate equation models; Theoretical Chemistry and Biology; Teoretisk kemi och biologi;

    Sammanfattning : YTTERBY, a small village very close to Stockholm where I live, is the place in the world which has lent its name to the largest number of elements in the periodic table, namely four - YTTRIUM, YTTERBIUM, ERBIUM and TERBIUM. Three more lanthanide elements were discovered from the now empty quarry located in this village. LÄS MER