Hydrothermal synthesis of yttria stabilized ZrO{sub 2} nanoparticles in subcritical and supercritical water using a flow reaction system

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.08.013· OSTI ID:21372376

Hayashi, Hiromichi ^[1]; Ueda, Akiko; Suino, Atsuko; Hiro, Kyoko; Hakuta, Yukiya ^[1]

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1. Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551 (Japan)

Yttria stabilized zirconia nanoparticles have been prepared by hydrothermal flow reaction system under subcritical and supercritical conditions. ZrO(NO{sub 3}){sub 2}/Y(NO{sub 3}){sub 3} mixed solutions were used as starting materials. Reaction temperature was 300-400 deg. C. Reaction time was adjusted to 0.17-0.35 s. Based on the residual Zr and Y concentrations, the complete conversion of zirconium was achieved irrespective of pH and hydrothermal temperature, whereas the conversion of yttrium increased with an increase in pH and hydrothermal temperature. Stoichiometric solid solution was achieved at pH>8. XRD results revealed that tetragonal zirconia can be formed regardless of yttrium content, where the tetragonality was confirmed by Raman spectroscopy. The average particle size estimated from BET surface area was around 4-6 nm. Dynamic light scattering particle size increased with the solution pH owing to the aggregation of primary particles. TG-DTA analyses revealed that weight losses for adsorbed water and hydroxyl groups decreased with hydrothermal temperature. - Graphical abstract: Nanoparticles of YSZ can be synthesized in subcritical and supercritical water using a hydrothermal flow reaction system. Given is the TEM image of YSZ nanoparticles.

• OSTI ID: 21372376
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 11; Other Information: DOI: 10.1016/j.jssc.2009.08.013; PII: S0022-4596(09)00397-1; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
DIFFERENTIAL THERMAL ANALYSIS
HYDROTHERMAL SYNTHESIS
NANOSTRUCTURES
RAMAN SPECTROSCOPY
SOLID SOLUTIONS
TEMPERATURE RANGE 0400-1000 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM NITRATES
YTTRIUM OXIDES
ZIRCONIUM NITRATES
ZIRCONIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
HOMOGENEOUS MIXTURES
LASER SPECTROSCOPY
MICROSCOPY
MIXTURES
NITRATES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SOLUTIONS
SPECTROSCOPY
SYNTHESIS
TEMPERATURE RANGE
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS