Sökning: "dielectric materials"
Visar resultat 21 - 25 av 210 avhandlingar innehållade orden dielectric materials.
21. Preparation and optical characterisation of antireflection coatingsand reflector materials for solar energy systems
Sammanfattning : An angle-resolved scatterometer and an integrating sphere for reflectance measurements at oblique angles of incidence have been designed and evaluated. The integrating sphere has a centre-mounted sample holder and the detector sits at the end of the sample holder and therefore always faces the same sphere wall area. LÄS MER
22. Multi-functional composite materials : CFRP thin film capacitors
Sammanfattning : The use of lightweight materials in structural applications is ever increasing. Today, lightweight engineering materials are needed to realise greener, safer and more competitive products. LÄS MER
23. Design, Fabrication and Characterization of GaN HEMTs for Power Switching Applications
Sammanfattning : The unique properties of the III-nitride heterostructure, consisting of gallium nitride (GaN), aluminium nitride (AlN) and their ternary compounds (e.g. AlGaN, InAlN), allow for the fabrication of high electron mobility transistors (HEMTs). LÄS MER
24. Polyolefin Flame Retardant Cable Materials - Effect of Additives and Copolymer Structure
Sammanfattning : Fire safety of cables is becoming increasingly important as the use of electrical equipment steadily increases. Due to their excellent dielectric properties, polyolefin materials are widely used as insulating materials for cables. However, polyolefins are inherently flammable and need to be protected to meet the requirements on flame retardancy. LÄS MER
25. Polymeric materials in nuclear power plants : Lifetime prediction, condition monitoring and simulation of ageing
Sammanfattning : Nuclear power plants generate a significant part of the world’s electrical power consumption. However, many plants are nearing the end of their designed lifetime, and to extend the lifetime it is important to verify that every component can withstand the added service time. This includes polymeric materials, which become brittle with time. LÄS MER