The characterization of the formation course of neodymium oxide from different precursors: A study of thermal decomposition and combustion processes
✍ Scribed by Basma A.A. Balboul; A.Y.Z. Myhoub
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 586 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0165-2370
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✦ Synopsis
a b s t r a c t Nd 2 (C 2 O 4 ) 3 •10H 2 O and Nd(NO 3 ) 3 •6H 2 O were used as parent compounds for the formation of Nd 2 O 3 . Intermediates, the final solid products and thermal processes involved in the decomposition course up to 800 • C in atmosphere of air were monitored by means of thermal analysis (DTA and TG), XRD, IR, SEM and N2-sorption isotherms. The S BET of the final product, Nd 2 O 3 , obtained from Nd 2 (C 2 O 4 ) 3 •10H 2 O at 610 • C has a surface area of 28 m 2 g -1 , while it reduces to 15 m 2 g -1 for the other phase of Nd 2 O 3 obtained at 800 • C.
The crystalline oxide Nd 2 O 3 obtained from Nd(NO 3 ) 3 •6H 2 O has higher surface area than the oxide obtained from the oxalate.
Nanocrystalline Nd 2 O 3 was synthesized by the combustion process. The crystallite size of the powder obtained is less than 50 nm and has high surface area which was produced at low ignition temperature (∼350 • C) and was investigated using XRD and transmission electron microscopy (TEM).
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