Microwave-assisted synthesis of micro/nano Nd-O powders

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F20%3A10247372" target="_blank" >RIV/61989100:27710/20:10247372 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2238785420315039" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2238785420315039</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2020.07.006" target="_blank" >10.1016/j.jmrt.2020.07.006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microwave-assisted synthesis of micro/nano Nd-O powders

Popis výsledku v původním jazyce

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. (C) 2020 The Author(s). Published by Elsevier B.V.

Název v anglickém jazyce

Microwave-assisted synthesis of micro/nano Nd-O powders

Popis výsledku anglicky

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. (C) 2020 The Author(s). Published by Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20400 - Chemical engineering

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Research and Technology

ISSN

2238-7854

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

10478-10490

Kód UT WoS článku

000579367500094

EID výsledku v databázi Scopus

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