Synthesis of yttria stabilized cubic zirconia (YSZ) powders by microwave-hydrothermal route

Khollam, Y. B.; Deshpande, A.S.; Patil, A.J.; Potdar, H.S.; Deshpande, S. B.; Date, S. K.

doi:10.1016/s0254-0584(01)00287-5

Cited by 81 publications

(37 citation statements)

References 17 publications

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“…The thermal stability of ZrO 2 also increased by doping with other metal oxides, as also shown by Stark et al [15] 2.2. Yttria-Doped Zirconia [16] reported that the cubic phase of 18YZ (10 mol % YZ) is maintained up to 800°C for 4 h, while at higher temperature the cubic phase is destabilized into the monoclinic phase -in contrast to our work where, after sintering at 900°C for 6 h, no monoclinic phase was found. Xu et al [17] produced 3.5YZ (2 mol % YZ) containing 35 wt % monoclinic phase by a two step, urea-based, hydrothermal synthesis.…”

Section: Introductioncontrasting

confidence: 96%

Thermal Stability of Flame‐Made Zirconia‐Based Mixed Oxides

Jossen

Heine

Pratsinis

et al. 2006

Chemical Vapor Deposition

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The thermal stability of pure and doped zirconia fabricated by flame spray pyrolysis (FSP) is studied by calcination at various temperatures and residence times. Powders are analyzed by X-ray diffraction (XRD), nitrogen adsorption (Brunauer-Emmett-Teller), energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The metastable tetragonal structure of flame-made ZrO 2 transformed to the monoclinic phase after sintering. Doping zirconia with yttria, ceria, lanthanum oxide, alumina, or silica increased its thermal stability and also hindered that phase transformation. For all doped powders, no monoclinic phase is formed during calcination. The combination of 25 wt % ceria, 10 wt % lanthanum oxide, and 65 wt % zirconia had the highest thermal stability.

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Section: Introductioncontrasting

confidence: 96%

Thermal Stability of Flame‐Made Zirconia‐Based Mixed Oxides

Jossen

Heine

Pratsinis

et al. 2006

Chemical Vapor Deposition

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“…Comparing it to FT-IR spectra for cubic zirconia, presented in the literature (Khollam et al, 2001), it is possible to see the presence of vibrational frequencies resulting from metaloxygen bonds characteristic of this phase around 471 cm -1 , revealing that the heat treatment at 700 °C allowed the stabilization of the zirconia cubic phase for the films prepared. The band located at 3455 cm -1 (zone I) can be attributed to bonds O -H, possibly due to the presence of solvent excess adsorbed in the film.…”

Section: Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 83%

Fuel Cell: A Review and a New Approach About YSZ Solid Oxide Electrolyte Deposition Direct on LSM Porous Substrate by Spray Pyrolysis

Falcade¹,

Malfatti²

2012

Electrochemical Cells - New Advances in Fundamental Researches and Applications

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“…3. This pattern shows that the deposited YSZ films were fully stabilized in the cubic phase [14]. YSZ thin films were deposited on porous Ni-GDC substrate by RF-sputtering.…”

Section: Simulationmentioning

confidence: 85%

Fabrication of YSZ/GDC Bilayer Electrolyte Thin Film for Solid Oxide Fuel Cells

Yang¹,

Choi

2014

Transactions on Electrical and Electronic Materials

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Yttria-stablized zirconia (YSZ) is the most commonly used electrolyte material, but the reduction in working temperature leads to insufficient ionic conductivity. Ceria based electrolytes (GDC) are more attractive in terms of conductivity at low temperature, but these materials are well known to be reducible at very low oxygen partial pressure. The reduction of electrolyte resistivity is necessary to overcome cell performance losses. So, thin YSZ/GDC bilayer technology seems suitable for decreasing the electrolyte resistance at lower operating temperatures. Bilayer electrolytes composed of a galdolinium-doped CeO 2 (Ce 0.9 Gd 0.1 O 1.95 , GDC) layer and yttria-stabilized ZrO 2 (YSZ) layer with various thicknesses were deposited by RF sputtering and E-beam evaporation. The bilayer electrolytes were deposited between porous Ni-GDC anode and LSM cathode for anode-supported single cells. Thin film structure and surface morphology were investigated by X-ray diffraction (XRD), using CuKα-radiation in the range of 2ce morphol℃. The XRD patterns exhibit a well-formed cubic fluorite structure, and sharp lines of XRD peaks can be observed, which indicate a single solid solution. The morphology and size of the prepared particles were investigated by fieldemission scanning electron microscopy (FE-SEM). The performance of the cells was evaluated over 500~800℃, using humidified hydrogen as fuel, and air as oxidant.

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Synthesis of yttria stabilized cubic zirconia (YSZ) powders by microwave-hydrothermal route

Cited by 81 publications

References 17 publications

Thermal Stability of Flame‐Made Zirconia‐Based Mixed Oxides

Thermal Stability of Flame‐Made Zirconia‐Based Mixed Oxides

Fuel Cell: A Review and a New Approach About YSZ Solid Oxide Electrolyte Deposition Direct on LSM Porous Substrate by Spray Pyrolysis

Fabrication of YSZ/GDC Bilayer Electrolyte Thin Film for Solid Oxide Fuel Cells

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