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- Title
Thermal stability and structural properties of Ta nanopowder synthesized via simultaneous reduction of TaO by hydrogen and carbon.
- Authors
Brar, Loveleen; Singla, Gourav; Kaur, Navjot; Pandey, O.
- Abstract
Tantalum nanoparticles have been synthesized by the single-step chemical reaction route. Simultaneous reduction of Tantalum Pentoxide (TaO) with the in situ produced hydrogen and carbon at 600 °C is a new approach for the production of Ta nanopowder. Δ H values obtained from thermodynamic calculations are used to predict the entire mechanism of reduction of bulk TaO into Ta nanoparticles. The results of X-ray diffraction studies show that the final product consists of predominately nano α-Ta with β-Ta as the minority phase. The lattice strain in the final product was calculated using Williamson-Hall formula. The effect of lattice strain on thermal stability of the samples was analyzed by differential scanning calorimetry and thermal gravimetry in the air atmosphere. The morphology and particle size distribution of Ta nanosized powders have been analyzed by scanning electron microscope and transmission electron microscope. The results show that average crystallite size of the product Ta nanopowder is about 2-7 nm.
- Subjects
THERMAL stability; CRYSTAL structure; METAL powders; CHEMICAL reduction; TANTALUM oxide; HYDROGEN; CARBON; NANOPARTICLE synthesis
- Publication
Journal of Thermal Analysis & Calorimetry, 2015, Vol 119, Issue 1, p175
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-014-4136-1