Yi Wang, Z. Cui, Zhikun Zhang
Sep 1, 2004
Citations
1
Influential Citations
24
Citations
Journal
Materials Letters
Abstract
In this work we report the synthesis of tantalum nanoparticles from bulk tantalum by hydrogen arc plasma method. The product obtained was investigated by ultraviolet (UV)–visible spectrum, X-ray diffractometer (XRD), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM) analysis. The size of these particles is less than 10 nm and there are few defects on their surface. A strong ultraviolet absorption below 320 nm was observed. XRD analysis revealed that the product consist of tantalum and hexagonal δ-TaO nanoparticles. The tantalum nanoparticles were easily oxidized in the air to form δ-TaO due to high activity. The thermal stability of sample was analyzed by thermogravimetry/differential scanning calorimetry (TG/DSC) in the ambience of dry N2 (containing less than 1% of oxygen).