Hydrothermal synthesis of yttria stabilized ZrO2 nanoparticles in subcritical and supercritical water using a flow reaction system

被引：37

作者：

Hayashi, Hiromichi ^{[1
]}

Ueda, Akiko ^{[1
]}

Suino, Atsuko ^{[1
]}

Hiro, Yoko ^{[1
]}

Hakuta, Yukiya ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Ctr Compact Chem Proc, Miyagino Ku, Sendai, Miyagi 9838551, Japan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2009年 / 182卷 / 11期

关键词：

Yttria stabilized zirconia; Hydrothermal synthesis; Supercritical water; Nanoparticle; Particle size; ZIRCONIA SOLID-SOLUTIONS; N-BUTANE ISOMERIZATION; ONE-STEP SYNTHESIS; CATALYTIC-ACTIVITY; CRYSTAL-STRUCTURES; DOPED ZIRCONIA; TEMPERATURE; POWDERS; NANOCRYSTALS; NUCLEATION;

D O I：

10.1016/j.jssc.2009.08.013

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Yttria stabilized zirconia nanoparticles have been prepared by hydrothermal flow reaction system under subcritical and supercritical conditions. ZrO(NO3)(2)/Y(NO3)(3) mixed solutions were used as starting materials. Reaction temperature was 300-400 degrees 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. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：2985 / 2990

页数：6

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