Optical phonon characteristics of an orthorhombic-transformed polymorph of CaTa2O6 single crystal fibre Abstract: Infrared-reflectivity spectroscopy and micro-Raman scattering were used to determine the optical phonon features of orthorhombic calcium tantalite (CaTa2O6) single crystal fibres. The fibres, […]
Mechanosynthesis of the multiferroic cubic spinel Co2MnO4: Influence of the calcination temperature Abstract: Multiferroic materials showing magnetoelectric coupling are required in various technological applications. Many synthetical approaches can be used to improve the magnetic and/or electrical […]
Structural refinement, optical and electrical properties of Ba1-x Sm-2x/3 (Zr0.05Ti0.95)O-3 ceramics Abstract: Samarium doped barium zirconate titanate ceramics with general formula [Ba1−x Sm2x/3](Zr0.05Ti0.95)O3 [x = 0, 0.01, 0.02, and 0.03] were prepared by high energy ball […]
Metal to insulator transition in Sb doped SnO2 monocrystalline nanowires thin films Abstract: We report on the growth and transport properties of single crystalline Sb doped SnO2 wires grown from chemical vapour deposition. While undoped samples […]
Photoluminescence emission at room temperature in zinc oxide nano-columns Abstract: Hydrothermal microwave method (HTMW) was used to synthesize crystalline zinc oxide (ZnO) nano-columns at the temperature of 120 °C with a soaking time of 8 min. […]
The influence of self-ordered TiO2 nanotubes microstructure towards Li+ intercalation Abstract: In this work, TiO2 nanotubes were prepared by anodization at a constant voltage in an electrolyte composed of fluoride species provided by ionic liquid (1 or 5 vol.%), applying 40 or 80 V. Different tube diameters […]
Ozone gas sensor based on nanocrystalline SrTi1-xFexO3 thin films Abstract: We report on the use of nanocrystalline SrTi1−xFexO3 (STF) for sensing ozone gas. Amorphous thin films were evaporated by the electron-beam physical vapor deposition technique and then converted to a polycrystalline form, as […]
Intrinsic magnetic properties of BixCo2−xMnO4 spinels obtained by short-time etching Abstract: We report the structural and magnetic properties of Co2MnO4, partially substituted by Bi at the octahedral site. Bismuth enhances ferromagnetism due to a decrease of the […]
Implementation of convective heating in Companhia Siderúrgica Nacional Blast Furnace runners Abstract: This paper describes the main characteristics and advantages of convective heating system for refractory lining, compared with conventional heating systems. In addition the main […]
Decay of photo-induced conductivity in Sb-doped SnO2 thin films, using monochromatic light of about bandgap energy Abstract: Doping tin dioxide (SnO2) with pentavalent Sb5+ ions leads to an enhancement in the electrical conductivity of this material, […]
Copyright © 2018 | Centro de Desenvolvimento de Materiais Funcionais