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Solution-Based Processing of Sc2O3 Nanopowders Yielding Transparent Ceramics

Published online by Cambridge University Press:  03 March 2011

Ji-Guang Li,
Takayasu Ikegami and
Toshiyuki Mori
Ji-Guang Li*
Affiliation:
Advanced Materials Laboratory, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
Takayasu Ikegami
Affiliation:
Advanced Materials Laboratory, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
Toshiyuki Mori
Affiliation:
Advanced Materials Laboratory, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
*
a)Address all correspondence to this author. e-mail: LI.Jiguang@nims.go.jp
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Abstract

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.

Keywords

ChemicalsynthesisNanoparticleSintering

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Type
Articles
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Journal of Materials Research , Volume 19 , Issue 3 , March 2004, pp. 733 - 736
Copyright
Copyright © Materials Research Society 2004

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References

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