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Formation of Lanthanum Hydroxide and Oxide via Precipitation

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Abstract:

Lanthanum hydroxide and oxide were prepared by the precipitation method in an aqueous medium at room temperature. The precipitate was examined using thermal analysis, X-ray diffraction and Scanning Electron Microscopy to investigate the phase evaluation and the thermal transformation by decomposition. The as-precipitated powder from the precipitation method was hexagonal La(OH)3. The lanthanum hydroxide was decomposed to oxide in two-steps as La(OH)3 → LaOOH + H2O and 2LaOOH → La2O3 + H2O.

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Nanocomposites and Nanoporous Materials VIII View Preview

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Periodical:

Solid State Phenomena (Volume 135)

Pages:

23-26

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.135.23

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Online since:

February 2008

Authors:

So Jin Kim, Won Kyu Han, Sung Goon Kang, Min Su Han, Young Hun Cheong

Keywords:

La(OH)3, La2O3, Precipitation, TG-DTA, X-Ray Diffraction (XRD)

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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