Essays about: "niob"

Found 4 essays containing the word niob.

  1. 1. Niobium Ohmic Contacts for Cryogenic Indium Phosphide High-Electron-Mobility Transistors

    University essay from KTH/Tillämpad fysik

    Author : Linnéa Bendrot; [2022]
    Keywords : Ohmic contacts; high-electron-mobility transistor; InP; Nb films; cryogenic electronics; low-noise amplifier; quantum computing; transfer length method; superconductivity; contact barrier resistance; Ohmska kontakter; högelektronmobilitetstransistorer; indiumfosfid; niob; tunnfilm; kryogen elektronik; lågbrusförstärkare; kvantdatorer; Transfer Length-metod; supraledning; kontakt- barriärresistans;

    Abstract : Ohmic contacts are crucial components in semiconductor devices such as transistors and diodes, and lowering their contact resistance is an important factor in device performance enhancement. This is especially important for low-noise amplifiers (LNAs) where device noise temperature decreases both directly and indirectly with decreasing contact resistance. READ MORE

  3. 2. Magnetic Mineralogy of Nb-bearing Carbonatites from Oldoinyo Dili (Tanzania)

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Julia Frejd; [2021]
    Keywords : carbonatites; niobium; rare earth elements; Oldoinyo Dili; magnetic properties; karbonatiter; niob; rare earth elements; Oldoinyo Dili; magnetiska egenskaper;

    Abstract : Niobium (Nb) and Rare Earth Elements (REE’s) have in recent years received considerable attention because of their importance to the modern technical industry, and more specifically the enhanced sustainability that comes with them. The main source for Nb and REE’s on Earth are carbonatites and associated alkaline silicate rocks. READ MORE

  4. 3. The influence of niobium content and cooling rate on mechanical properties of grey cast iron

    University essay from KTH/Materialvetenskap

    Author : Yingshan Yao; [2018]
    Keywords : Grey Cast Iron; Niobium; Cooling Rate; Tensile Strength;

    Abstract : This project mainly investigated how the niobium(Nb) content influences the microstructure and mechanical properties of grey cast iron. Considering the mechanism, the study also analyzes the relationship between microstructure and mechanical properties. READ MORE

  5. 4. Thermodynamic and electronic properties of niobium at finite temperatures

    University essay from Linköpings universitet/Teoretisk Fysik; Linköpings universitet/Tekniska fakulteten

    Author : Johan Tidholm; [2015]
    Keywords : Anharmonicity; Thermodynamic properties; Electronic properties; Niobium; Finite temperatures;

    Abstract : Niobium (Nb) is a fascinating element, that when it is in a solid state has remarkable properties. This is believed to be a result of its electronic configuration that has partially filled 4d and 5s sub-shells. Nb has a melting temperature of 2750 K, a high strength at high temperature, and a good wear resistance. READ MORE