Synthesis of Nanosize Yttria-Stabilized Zirconia by a Molecular Decomposition Process

Journal Article · Thu Feb 15 00:00:00 EST 2001 · Journal of Solid State Chemistry

OSTI ID:783964

Yi, Jiang; Bhide, Sanjeevani V; Virkar, Anil V

Nanosize yttria-stabilized zirconia (YSZ) was synthesized by a novel approach based on molecular decomposition. In this approach, yttria-doped BaZrO{sub 3} (Y-BaZrO{sub 3}) or yttria-doped Na{sub 2}ZrO{sub 3} (Y-Na{sub 2}ZrO{sub 3}) precursors were first synthesized from BaCO{sub 3}, ZrO{sub 2}, and Y2O{sub 3} or BaCO{sub 3} and commercial YSZ for Y-BaZrO{sub 3}, and from Na2CO{sub 3} and YSZ for Y-Na2ZrO{sub 3}, by a conventional solid-state reaction method. The precursors were then boiled to leach away the unwanted species, BaO or Na{sub 2}O, either in a dilute HNO{sub 3} solution in water in the case of Y-BaZrO{sub 3}, or in deionized water in the case of Y-Na{sub 2}ZrO{sub 3}. During boiling in HNO{sub 3} or water, the residue of Zr-Y-O skeleton formed fine, nanosize YSZ particles. The particle size of the as-synthesized nanosize powders estimated from X-ray diffraction peak broadening was {approximately}2-3 nm, while that estimated from specific surface area measurements by BET adsorption isotherm was {approximately}15 nm. Examination under a transmission electron microscope showed that the crystallite size was {approximately}5 nm. Samples were also examined by Raman spectroscopy to determine the crystallographic polymorph of the YSZ formed. Subsequent heating in air led to particle growth. However, even when the particles were heated to a temperature as high as 1000 C, the particle size was well in the nanosize range.

• Research Organization: Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah (US)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE) (US)
• OSTI ID: 783964
• Journal Information: Journal of Solid State Chemistry, Vol. 157, Issue 1; Other Information: PBD: 15 Feb 2001; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION ISOTHERMS
AIR
BOILING
ELECTRON MICROSCOPES
HEATING
PARTICLE SIZE
RAMAN SPECTROSCOPY
RESIDUES
SKELETON
SPECIFIC SURFACE AREA
SYNTHESIS
WATER
X-RAY DIFFRACTION
YTTRIUM OXIDES
BARIUM OXIDES
SODIUM OXIDES
ZIRCONIUM OXIDES
CHEMICAL PREPARATION
DECOMPOSITION
LEACHING
LINE BROADENING
TRANSMISSION ELECTRON MICROSCOPY
EXPERIMENTAL DATA