In{sub 2}O{sub 3} microcrystals obtained from rapid calcination in domestic microwave oven

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.06.056· OSTI ID:22202862

Lima, R. C. ^[1]; Marques, A. P.A.; Leite, E. R. ^[2]; Varela, J. A.; Longo, E. ^[3]

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1. IQ, UFU, Av. Joao Naves de Avila, 2121, CEP 38400-902 Uberlandia, MG (Brazil)
2. LIEC, DQ, UFSCar, Via Washington Luiz, km 235, CEP 13565-905 Sao Carlos, SP (Brazil)
3. LIEC, IQ, UNESP, Rua Francisco Degni s/n, CEP 14801-907 Araraquara, SP (Brazil)

The simple way to prepare In{sub 2}O{sub 3} microcrystals is reported in this paper. The precursor, In(OH){sub 3} microstructures, were obtained using the Microwave-Assisted Hydrothermal (MAH) Method. By annealing as-prepared In(OH){sub 3} precursor at 500 {sup o}C for 5 min in a domestic microwave oven (MO), In{sub 2}O{sub 3} microcrystals were prepared, inheriting the morphology of their precursor while still slightly distorted and collapsed due to the In(OH){sub 3} dehydration process which was studied by thermal analysis. The In(OH){sub 3} and In{sub 2}O{sub 3} were characterized using powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and Raman spectroscopy. These techniques confirm the chemical dehydration of In(OH){sub 3} and the formation of In{sub 2}O{sub 3} powders. The domestic MO promotes a rapid structural organization as compared with a CF (conventional furnace). The MAH method and the subsequent annealing in a domestic MO were shown to be a low cost route for the production of In{sub 2}O{sub 3}, with the advantages of lower temperature and smaller time.

• OSTI ID: 22202862
• Journal Information: Materials Research Bulletin, Vol. 45, Issue 11; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALS
DEHYDRATION
FIELD EMISSION
INDIUM HYDROXIDES
INDIUM OXIDES
MICROSTRUCTURE
MICROWAVE OVENS
POWDERS
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
THERMAL ANALYSIS
X-RAY DIFFRACTION