Blar i Institutt for materialteknologi på emneord "Industriell kjemi og bioteknologi, Materialer for energiteknologi"
Viser treff 1-19 av 19
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A new material for oxygen-permeable membranes
(Master thesis, 2017)In this study, hexagonal YMnO3 doped with 15% Ti was used in the preparation of an asymmetric oxygen permeable membrane. Several different methods for the fabrication of the asymmetric membrane have been used, and the ... -
Conductive Coatings for Metal Bipolar Plates in Proton Exchange Membrane Water Electrolyzers
(Master thesis, 2016)Due to the use of expensive materials, only 4 % of hydrogen production today is from water electrolysis. The most efficient low-temperature electrolyzer is the proton exchange membrane electrolyzer (PEMWE), where the bipolar ... -
Corrosion and Cathodic Protection of Steel-Aluminium Galvanic Couples in Subsea Structures
(Master thesis, 2018)An increasing interest for use of aluminium in subsea structures has been seen the resent years, considering replacing some of the heavier steel components with aluminium. Due to good corrosion resistance and strength to ... -
Development of an asymmetrical oxygen permeable membrane based on hexagonal manganites
(Master thesis, 2016)Pure oxygen is a commodity chemical needed in many industries. Separation of oxygen from air is usually performed by the expensive and highly energy-demanding process of cryogenic distillation. A promising and more ... -
Distribution of Phosphorus between FeSi/Si and CaO-SiO2 Slags at 1600o C
(Master thesis, 2017)The aim of this thesis was to determine data for the phosphorus(P) distribution coefficients between ferrosilicon(FeSi) or silicon(Si) and calcia-silica(CaO SiO2) slags. The work was carried out due to inconsistencies ... -
Electrical and structural properties of multicrystalline silicon grown from reusable silicon nitride crucibles
(Master thesis, 2016)The solar cell industry has grown considerably and experiences renewed public interest due to technological advances and awareness of human impact on the environment. However, the industry faces several challenges that ... -
Electrochemical analysis of aluminium alloy 5182 and 6016 with different surface treatments in 0.1 M NaCl electrolyte
(Master thesis, 2018)Replacing steel parts in cars with aluminium (Al) can reduce the weight by up to 50 % and contribute to decreased CO2 emissions. Aluminium is also easily and inexpensively recyclable. A lot of research is therefore conducted ... -
Electroplating of Stainless Steel in Aqueous Alkaline Solution
(Master thesis, 2017)Electroplated stainless steel alloys containing elements such as iron, chromium and nickel, are of great interest in production of electronics and nanotechnology devices. Previous methods for electroplating of these alloys ... -
Lead-free piezoelectric materials for medical application
(Master thesis, 2018)In this work, K0.5Na0.5NbO3, (KNN) and K0.495Na0.495Ca0.005NbO3 thin films for biomedical applications have been prepared from an aqueous precursor solutions with 2.5 or 5.0 mol% of alkali excess. Ca2+ was introduced as ... -
Liquinert quartz crucible - Removal of OH groups in silica crucibles to reduce wetting between the crucible and the silicon melt
(Master thesis, 2018)When producing monocrystalline silicon ingots for the solar cell industry quartz crucibles are most commonly used. A quartz crucible used in the Czochralski (CZ) process will be used to pull ingots for more than 100 hours. ... -
Microstructural design of CaMnO3 and its thermoelectric proprieties.
(Master thesis, 2015)Calcium manganate (CMO) is an n-type semiconductor with promising thermoelectric proprieties. Solid state synthesis was employed to synthesise the desired material in two phases: i) reduced rock-salt phase of CaO-MnO (ss) ... -
Numerical modelling and photo-electrochemical characterization of dye sensitized solar cells
(Master thesis, 2017)Current-potential characteristics were recorded, and intensity modulated photocurrent spectroscopy (IMPS), intensity modulated photovoltage spectroscopy (IMVS), and electrochemical impedance spectroscopy (EIS) was performed ... -
Optimisation of Spray Pyrolysed (La0.6Sr0.4)0.99CoO3 Cathodes for Solid Oxide Fuel Cells
(Master thesis, 2016)The effect of the precursor concentration and the concentration of citric acid (CA) on the properties of (La0.6Sr0.4)0.99CoO3 (LSC), prepared by spray pyrolysis, has been studied. Precursor solutions with concentrations ... -
Phase Stability and Point Defects in InMnO3
(Master thesis, 2014)During the last decade hexagonal manganites (h-RMNO3) have been a widely researched topic. This is mainly due to their multiferroic property that makes them a potential material for use in future electronics, data storage ... -
Photoelectrochemical Characterization of Dye-sensitized Solar Cells
(Master thesis, 2018)Dye-sensitized solar cells, DSSCs, are thin film solar cells based on a photoelectrochemical system where a photo-sensitized anode and an electrolyte forms a semiconductor. Upon exposure of sunlight, the surface of the ... -
Preparation and surface modifications on hollow silica nano spheres - Nano- insulation
(Master thesis, 2018)Hollow silica nano spheres (HSNS) were synthesised with the use of polystyrene templates. Based on the polystyrene templates, tetraethyl orthosilicate (TEOS) was hydrolysed and attached on the surface, in either an acidic ... -
Purification of Silicon Through a Hydrometallurgical Process
(Master thesis, 2017)The demand for cleaner energy is rising because of the global warming and because of the access of fossil energy one day will come to an end. For encounter this demand, solar cells have a huge potential. Today the market ... -
The Effect of Donor Doping with Ti4+ on the Oxygen Absorption Properties of h-YMnO3
(Master thesis, 2016)In this thesis, the effect of donor doping with Ti4+ on the oxygen absorption properties in the hexagonal rare-earth magnanite h-YMnO3 was studied and compared to undoped compounds of the same material class. Bulk-sized ... -
Wetting testing of wettable cathodes for aluminium production
(Master thesis, 2017)The aim of this work has been to assess the wettability of a set of carbon-TiB2 composites towards aluminium. In order to do so, further improvements to the immersion-emersion method, a method used to assess the wetting ...