Comparative studies on properties of scandia-stabilized zirconia synthesized by the polymeric precursor and the polyacrylamide techniques

Costa, Gustavo; Muccillo, R.

doi:10.1016/j.jallcom.2010.05.036

Cited by 19 publications

(11 citation statements)

References 26 publications

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“…Scanning electron microscopy images of the as-synthesized ZrO 2 :10 mol% Sc 2 O 3 powders calcined at 650ºC for 4 h have already been reported (20). The powders obtained by the polymeric precursor technique consist mainly of small hard agglomerates of average size around 20 μm, exhibiting irregular shapes with faceted borders, often lengthened, in agreement with the particle size determination by laser scattering.…”

Section: Resultssupporting

confidence: 74%

Properties of Scandia-Doped Zirconia Synthesized by the Polymeric Precursor and the Polyacrylamide Techniques

Muccillo¹,

Costa²

2010

ECS Trans.

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Zirconia-10 mol% scandia powders were synthesized by the polyacrylamide and the polymeric precursor techniques. The state of agglomeration of the powder particles was analyzed by laser scattering, the structural phases by X-ray diffraction, and the morphology by scanning electron microscopy. Transparent gels and polymeric resins were obtained by the polyacrylamide and the polymeric precursor techniques, respectively. The resulting ceramic powders, fully stabilized in the cubic fluorite structure, had high surface area. The electrical behavior of sintered pellets, using powders synthesized by both techniques, was analyzed by the impedance spectroscopy technique. The content of organics used in the syntheses was related to the state of agglomeration of the ceramic powders which, by its turn, was responsible for the different electrical behavior of the sintered pellets.

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Section: Resultssupporting

confidence: 74%

Properties of Scandia-Doped Zirconia Synthesized by the Polymeric Precursor and the Polyacrylamide Techniques

Muccillo¹,

Costa²

2010

ECS Trans.

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“…The endothermic peak in the DTA curve around 105 uC, corresponding to the first weight loss shown by TG-DTA curve, is due to the dehydration of the precursor. [25][26][27] Based on the TG-DTA analysis ( Fig. 199 uC) in the gel.…”

Section: Resultsmentioning

confidence: 99%

Comparative studies on synthesis of nanocrystalline Sc2O3–Y2O3 doped zirconia (SYDZ) and YSZ solid solution via modified and classic Pechini method

et al. 2013

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Nanocrystalline tetragonal Sc 2 O 3 (3.5 mol%) and Y 2 O 3 (0.5 mol%) doped zirconia (SYDZ and YSZ) solid solutions were prepared by modified and classic Pechini method, respectively. In this approach, zirconium oxynitrate, scandium and yttrium nitrate, citric acid (CA) and ethylene glycol monobutyl ether (EGM) were used as the sources of Zr 4+ , Sc 3+ , Y 3+ , and the chelating and solvent agents, respectively. The SYDZ nanocrystals, synthesized with a 1Zr 4+ : 4EGM : 4CA mole ratio in acidic medium (pH y1) at 700 uC, had a smaller particle size (15 ¡ 3 nm) than YSZ synthesized with the classic Pechini method. Also, our optimized synthesis was applied to a large scale elaboration by increasing the quantity of precursors. Finally, The optical properties of SYDZ nanocrystals were also investigated by UV-vis spectroscopy.

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“…), (ii) polyesterification of excess hydroxycarboxylic acid with ethylene glycol [25]. However, the effect of EGM and CA molecules on the particle size of products could be due to the steric hindrance [12,23], but the proposed mechanism for this observation needs other experiments. CA can form very stable chelating complexes with many metal ions, and these formed metal-CA complexes can be further stabilized in EG as it possesses two alcoholic hydroxyl functional groups (-OH) with strong complexation affinities to metal ions, furthermore, two hydroxyl functional groups in one EG molecule can react with three carboxylic acid groups (-COOH) in one CA molecule to form a polyester resin (see reported mechanism in Refs [25,31]).…”

Section: Probable Formation Mechanismmentioning

confidence: 99%

Synthesis of Scandia, Yttria Stabilized Zirconia (SYSZ) Nanoparticles by New Wet Chemistry Method

Loghman-Estarki¹,

Razavi²,

Edris³

2012

Current Nanoscience

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In this paper, scandia, yttria stabilized zirconia (SYSZ) nanoparticles were prepared by a wet chemistry method based on the Pechini-type sol-gel method. In this approach, zirconium oxynitrate, scandium and yttrium nitrate, citric acid (CA) and ethylene glycol mono butyl ether (EGM) were used as the source of Zr 4+ , Sc 3+ , Y 3+ , the chelating and solvent agent, respectively. In this study, the effect of EGM:CA ratios and calcination temperatures on the structure, morphology and the particle size of SYSZ have been investigated. The microstructure of the products was characterized by X-ray diffractometry (XRD), thermogravimetric and differential thermal analysis (TG/DTA), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), selected area electron diffraction (SAED), inductively coupled plasma emission spectroscopy (ICP), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The SYSZ nanoparticles synthesized with EGM:CA mole ratio 4:1 and calcined at 700 °C, have average diameter of ~15 nm and purity of 97.58%. Also, the optical properties of the as-prepared samples at different calcinations temperatures have been investigated.

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Comparative studies on properties of scandia-stabilized zirconia synthesized by the polymeric precursor and the polyacrylamide techniques

Cited by 19 publications

References 26 publications

Properties of Scandia-Doped Zirconia Synthesized by the Polymeric Precursor and the Polyacrylamide Techniques

Properties of Scandia-Doped Zirconia Synthesized by the Polymeric Precursor and the Polyacrylamide Techniques

Comparative studies on synthesis of nanocrystalline Sc2O3–Y2O3 doped zirconia (SYDZ) and YSZ solid solution via modified and classic Pechini method

Synthesis of Scandia, Yttria Stabilized Zirconia (SYSZ) Nanoparticles by New Wet Chemistry Method

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