Search for dissertations about: "quartz"

Showing result 1 - 5 of 265 swedish dissertations containing the word quartz.

  1. 1. Silicon and Quartz Microengineering : Processing and Characterisation

    Author : Örjan Vallin; Peter Enoksson; Uppsala universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Engineering physics; silicon; quartz; microengineering; microstructure; MEMS; wafer bonding; direct bonding; adhesion quantification; Teknisk fysik; Engineering physics; Teknisk fysik;

    Abstract : Microengineering has developed a broad range of production techniques to reduce size, increase throughput, and reduce cost of electrical and mechanical devices. The miniaturisation has also entailed entirely new opportunities. READ MORE

  2. 2. Quartz in Swedish iron foundries : exposure and cancer risk

    Author : Lena Andersson; Håkan Westberg; Gunilla Lindström; Per Gustavsson; Örebro universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Case-control study; crystalline silica; exposure assessment; iron foundry; lung cancer; morbidity; occupational hygiene; respirable quartz; Enviromental Science; Miljövetenskap;

    Abstract : The aims of the studies underlying this thesis were to assess the exposure to quartz in Swedish iron foundries and to determine the cancer morbidity for Swedish foundry workers. A cohort of 3,045 foundry workers and a final measurement database of 2,333 number of samples was established. READ MORE

  3. 3. From Silicon to Quartz : Microstructure Technology Transfer for Increased Frequency Stability

    Author : Örjan Vallin; Uppsala universitet; []
    Keywords : ;

    Abstract : .... READ MORE

  4. 4. Layer Formation on Bed Particles during Fluidized Bed Combustion and Gasification of Woody Biomass

    Author : Hanbing He; Marcus Öhman; Kent Davidsson; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; layer formation; bed particle; woody biomass; quartz; K-feldspar; olivine; bed agglomeration; deposition; fluidized bed; combustion; gasification; Energiteknik; Energy Engineering;

    Abstract : Although more than a hundred papers dealing with the agglomeration problem in combustion and gasification of biomass can be found in the literature, very few studies focusing on the bed particle layer formation process in fluidized bed combustion (FBC) and fluidized bed gasification (FBG) can be found. With increased knowledge of the bed particle layer formation process — i. READ MORE

  5. 5. Characterization of Ceramic Raw Minerals in Uganda for Production of Electrical Porcelain Insulators

    Author : Peter Wilberforce Olupot; Stefan Jonsson; Thomas Johansson; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Electrical porcelain; glaze; characterisation; multite; quartz; Uganda; Materials science; Teknisk materialvetenskap;

    Abstract : In this work an extended literature survey on ceramics and porcelains in particular, has been documented. Samples from two Ugandan deposits of each feldspar and quartz were characterised by means of X-ray diffraction, thermal analysis, chemical analysis and scanning electron microscopy and found to possess requisite properties for making electro porcelain insulators. READ MORE