Sökning: "Composite metal oxides"

Visar resultat 1 - 5 av 23 avhandlingar innehållade orden Composite metal oxides.

1. 1. Electrochemical water splitting based on metal oxide composite nanostructures

   Författare :Aneela Tahira; Omer Nur; Magnus Willander; Rasit Turan; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Composite metal oxides; hydrothermal method; water splitting; Tafel slope; stability; durability; alkaline media; acidic media;

   Sammanfattning : The occurrence of available energy reservoirs is decreasing steeply, therefore we are looking for an alternative and sustainable renewable energy resources. Among them, hydrogen is considered as green fuel with a high density of energy. LÄS MER

3. 2. Magnetron Sputtering of Nanocomposite Carbide Coatings for Electrical Contacts

   Författare :Kristian Nygren; Ulf Jansson; Peter Leisner; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transition metal carbide; amorphous carbon; composite; contact resistance; corrosion; friction; optical properties;

   Sammanfattning : Today’s electronic society relies on the functionality of electrical contacts. To achieve good contact properties, surface coatings are normally applied. Such coatings should ideally fulfill a combination of different properties, like high electrical conductivity, high corrosion resistance, high wear resistance and low cost. LÄS MER

4. 3. Functional Metal Oxide Materials Deposited by Inkjet Printing Technique

   Författare :Yan Wu; Lyubov Belova; Gillian Gehring; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Inkjet printing; photoconductivity; ZnO; Al-ZnO; composite; electron transfer; CdS; field effect transistor; photosensitive; RT do-ferromagnetism; Mn-doped ZnO; MgO; Materials science; Teknisk materialvetenskap;

   Sammanfattning : This thesis presents a comprehensive study of the intrinsic room temperature ferromagnetism in 85 to 100nm thin films produced by in situ deposition of industrially important pristine MgO and ZnO by inkjet printing. It is suggested that the observed long range magnetic order, the so-called do magnetism in these oxides arises from cation vacancies. LÄS MER

5. 4. Tribology of Metal-Graphite Composites : A Study of Sliding Electrical Contact Surfaces

   Författare :Martina Grandin; Wiklund Urban; Staffan Jacobson; Ulf Jansson; Christian Holzapfel; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tribology; tribofilm; surface analysis; wear; friction; electrical contacts; metal-graphite; contact resistance; cross-section; nanocomposite coating; copper; silver; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

   Sammanfattning : An environmentally sustainable production of electrical power is important for preserving the earth’s natural resources. In order to utilize this power as efficiently as possible, it is of great importance to minimize the losses, for example in sliding electrical contacts. LÄS MER

7. 5. Advanced Nanostructured Transition Metal Oxide Semiconductors for Solar Energy Applications

   Författare :Pedram Ghamgosar; Alberto Vomiero; Nils Almqvist; Federica Rigoni; Mauro Salvatore Epifani; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metal Oxide; Photovoltaic; Semiconductors; Self-powered photodetectors; Photoelectrochemical cell; Solar fuel; Water splitting; Experimentell fysik; Experimental Physics;

   Sammanfattning : Increasing energy consumption and its environmental impacts make it necessary to look for alternative energy sources. Solar energy as huge energy source that can cover the terms sustainability is considered as a favorable alternative. LÄS MER