Solution-Based Processing of Sc2O3 Nanopowders Yielding Transparent Ceramics

A basic sulfate precursor [Sc(OH)SO4·2H2O] for well-sinterable Sc2O3 powders was precipitated from mixed solutions of scandium nitrate [Sc(NO3)3] and ammonium sulfate [(NH4)2SO4] at room temperature and which was subsequently converted to Sc2O3 via dehydroxylization and desulfurization at temperatur...

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Bibliographic Details
Published in:Journal of materials research 2004-03, Vol.19 (3), p.733-736
Main Authors: Li, Ji-Guang, Ikegami, Takayasu, Mori, Toshiyuki
Format: Article
Language:English
Subjects:
Chemical synthesis
Nanoparticle
Sintering
Online Access:Get full text
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Summary:A basic sulfate precursor [Sc(OH)SO4·2H2O] for well-sinterable Sc2O3 powders was precipitated from mixed solutions of scandium nitrate [Sc(NO3)3] and ammonium sulfate [(NH4)2SO4] at room temperature and which was subsequently converted to Sc2O3 via dehydroxylization and desulfurization at temperatures ≥900 °C. With the reactive powders synthesized in this work, polycrystalline Sc2O3 ceramics showing high inline transmittances of approximately 70% in the visible wavelength region (corresponding to ∼90% of the theoretical value of single crystals) have been fabricated via vacuum sintering at a relatively low temperature of 1700 °C.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2004.19.3.733