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T1 - Synthesis of zirconia microfibers from aqueous solutions

Abdelal, Nickel Stabilized Zirconia for SOFCs: Synthesis and Characterization, , Vol.

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Zirconia sol is first synthesized using the hydrothermal method.

Xiaowei, “Synthesis of nanocomposite nickel oxide/yttrium-stabilized zirconia (NiO/YSZ) powders for anodes of solid oxide fuel cells (SOFCs) via microwave-assisted complex-gel auto-combustion”, Journal of Power Sources, vol.195, pp.1308-1315, 2010.

T1 - Preparation of zirconia base solid solution nanopowder by exothermal solid-state synthesis

N2 - Zirconia sphere particles were synthesized through the gelation process of Na-alginate, and cermet (ZrO2-Mo) pellets were fabricated under several conditions. In this process, a zirconia slurry was prepared by mixing oxide powders (ZrO2, Y2O3, Er2O 3, CeO2), distilled water and Na-alginate, and subsequently dropped into CaCl2 solution. As a result, zirconia sphere particles coated with a gelled film were synthesized. The slurry density (zirconia content in slurry) of 30-64 wt.% and Na-alginate concentration of a few% were good for gelation for up to 10 wt.% CaCl2 solution. Sphere particles with smaller diameter were obtained by dropping slurry with a mechanical vibration. The prolongation of the ball milling time for mixture of oxide powders was effective to increase the sintered density of zirconia sphere particles, especially for higher CeO2 concentration. The dense cermet pellets were fabricated for max. 50% volume ratio of zirconia phase for Mo matrix using zirconia particles covered with Mo powder by a rotating granulation method.

Synthesis of zirconia thin films by RPECVD - …

T1 - Synthesis of nanosize yttria-stabilized zirconia by a molecular decomposition process

This project aims to ascertain the optimal conditions of hydrothermal synthesis so as to achieve zirconia particles of small volume structures, 500 nm to 1 µm in length with uniform aspect ratios.

In recent years, many solution based chemical synthesis methods have been reported for synthesis of zirconia, of which the sol-gel method is considered to be best.

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T1 - Synthesis of yttria-stabilized Zirconia Nanopowders by a Thermal Plasma Process

N2 - A new method is put forward to prepare nanometer zirconia base solid solution by exothermal solid-state synthesis. This method is realized by agitating solid mixture of sodium hydroxide, zirconium oxychloride, and yttrium/calcium nitride. Fresh and final powders are studied by X-ray fluorescence, X-ray photoemission spectroscopy, X-ray diffraction, and transmission electron microscopy. The results show the obtained tetragonal/cubic zirconia solid solution nanopowders are highly pure and distribute around 5 nm. It is suggested that the coordinated water of zirconium oxychloride acts as micro medium and the nuclei of solid solution are formed under the superalkaline environment and grow during heat treatment. This method may be useful to prepare other metal oxide nanopowders.

AB - A new method is put forward to prepare nanometer zirconia base solid solution by exothermal solid-state synthesis. This method is realized by agitating solid mixture of sodium hydroxide, zirconium oxychloride, and yttrium/calcium nitride. Fresh and final powders are studied by X-ray fluorescence, X-ray photoemission spectroscopy, X-ray diffraction, and transmission electron microscopy. The results show the obtained tetragonal/cubic zirconia solid solution nanopowders are highly pure and distribute around 5 nm. It is suggested that the coordinated water of zirconium oxychloride acts as micro medium and the nuclei of solid solution are formed under the superalkaline environment and grow during heat treatment. This method may be useful to prepare other metal oxide nanopowders.

T1 - Synthesis of zirconia sphere particles based on gelation of sodium alginate
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  • Zirconia Nanomaterials: Synthesis and Biomedical Application

    T1 - Composite alumina-zirconia nanoparticle synthesis by Liquid Flame Spray (LFS) from metal organic precursors

  • Synthesis of zirconia thin films by RPECVD - ResearchGate

    and (2013)Zirconia fiber via biotemplate synthesis route. Materials Letters, 101. pp. 13-16. ISSN 0167-577X

  • Crystalline zirconia and method of synthesis - Google …

    Here, we synthesize zirconia by a sol gel assisted precipitation method using either PEG or PVA as a stabilizing agent.

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Synthesis of Bioactive Hydroxyapatite-Zirconia …

A new method is put forward to prepare nanometer zirconia base solid solution by exothermal solid-state synthesis. This method is realized by agitating solid mixture of sodium hydroxide, zirconium oxychloride, and yttrium/calcium nitride. Fresh and final powders are studied by X-ray fluorescence, X-ray photoemission spectroscopy, X-ray diffraction, and transmission electron microscopy. The results show the obtained tetragonal/cubic zirconia solid solution nanopowders are highly pure and distribute around 5 nm. It is suggested that the coordinated water of zirconium oxychloride acts as micro medium and the nuclei of solid solution are formed under the superalkaline environment and grow during heat treatment. This method may be useful to prepare other metal oxide nanopowders.

Yttria essay zirconia stabilized synthesis

Nanosize yttria-stabilized zirconia (YSZ) was synthesized by a novel approach based on molecular decomposition. In this approach, yttria-doped BaZrO3 (Y-BaZrO3) or yttria-doped Na2ZrO3 (Y-Na2ZrO3) precursors were first synthesized from BaCO3, ZrO2, and Y2O3 or BaCO3 and commercial YSZ for Y-BaZrO3, and from Na2CO3 and YSZ for Y-Na2ZrO3, by a conventional solid-state reaction method. The precursors were then boiled to leach away the unwanted species, BaO or Na2O, either in a dilute HNO3 solution in water in the case of Y-BaZrO3, or in deionized water in the case of Y-Na2ZrO3. During boiling in HNO3 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 ∼2-3 nm, while that estimated from specific surface area measurements by BET adsorption isotherm was ∼15 nm. Examination under a transmission electron microscope showed that the crystallite size was ∼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.

Yttria stabilized zirconia synthesis essay - Busiwagi

N2 - Nanosize yttria-stabilized zirconia (YSZ) was synthesized by a novel approach based on molecular decomposition. In this approach, yttria-doped BaZrO3 (Y-BaZrO3) or yttria-doped Na2ZrO3 (Y-Na2ZrO3) precursors were first synthesized from BaCO3, ZrO2, and Y2O3 or BaCO3 and commercial YSZ for Y-BaZrO3, and from Na2CO3 and YSZ for Y-Na2ZrO3, by a conventional solid-state reaction method. The precursors were then boiled to leach away the unwanted species, BaO or Na2O, either in a dilute HNO3 solution in water in the case of Y-BaZrO3, or in deionized water in the case of Y-Na2ZrO3. During boiling in HNO3 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 ∼2-3 nm, while that estimated from specific surface area measurements by BET adsorption isotherm was ∼15 nm. Examination under a transmission electron microscope showed that the crystallite size was ∼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.

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