Microwave-assisted synthesis of micro/nano Nd O powders
| Autor: | Anish Khan, Bahaa M. Abu-Zied |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
rare earth oxides Thermogravimetric analysis Materials science Analytical chemistry chemistry.chemical_element 02 engineering and technology neodymium oxalate 01 natural sciences Neodymium Oxalate microwave synthesis Nd2O3 Biomaterials chemistry.chemical_compound Electrical resistivity and conductivity Phase (matter) 0103 physical sciences Molecule lcsh:Mining engineering. Metallurgy 010302 applied physics electrical conductivity Precipitation (chemistry) Metals and Alloys 021001 nanoscience & nanotechnology Surfaces Coatings and Films Amorphous solid chemistry Ceramics and Composites 0210 nano-technology |
| Zdroj: | Journal of Materials Research and Technology, Vol 9, Iss 5, Pp 10478-10490 (2020) |
| ISSN: | 2238-7854 |
| DOI: | 10.1016/j.jmrt.2020.07.006 |
| Popis: | This paper reports the synthesis of Nd-2(C2O4)(3)center dot 10H(2)O with plate-like morphology employing the microwave-assisted precipitation as a new strategy. Thermogravimetric analysis (TGA-DTG) results supported the presence of 10 water molecules of hydration of the prepared neodymium oxalate, which decomposes to give neodymium oxide (Nd2O3) as a final product throughout the dioxy-carbonate intermediate formation. Based on its thermal behaviour, portions of the prepared neodymium oxalate were heated non-isothermally, utilizing a similar heating rate to that used in the TGA experiment, at the range 400-800 degrees C, then quenched to room temperature. Phase characterization indicated the formation of an amorphous carbonate phase at 400 degrees C, which crystallizes at 500 degrees C giving the hexagonal Nd2O2CO3 phase. The formed Nd2O3 at the range 700-800 degrees C was found to have a high ability to absorb atmospheric water vapour forming Nd(OH)(3). The electrical conductivity measurements revealed strong dependence on the pre-treatment temperature, where the Nd-600 sample showed the highest values. The fluorescent properties of the pre-heated solids revealed the absence of a notable peak shift and fluorescence behaviour of the various samples was correlated with the structure modifications occurring during the pre-treatment. Web of Science 9 5 10490 10478 |
| Databáze: | OpenAIRE |
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