Results 261 to 270 of about 26,876 (284)

The Defect Structure of Yttria Stabilized Zirconia

MRS Proceedings, 1985
AbstractWe present results of EXAFS and computer simulation studies of the defect structure of yttria-stabilised zirconia. The results are analysed in terms of dopant-vacancy association models for this phase.
Alastair N. Cormack, Alan V. Chadwick, C. R. A. Catlow, M. Leslie, L. M. Moroney, G.N. Greaves   +5 more
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Thermal Expansion of Yttria‐Stabilized Zirconia

Journal of the American Ceramic Society, 1964
The thermal expansion of yttria-stabilized zirconia was measured in air and in a high-oxygen atmosphere. Room temperature-to-1000 deg C expansion measurements were made in an automatic recording dilatometer. Measurements above 1000 deg C were made in an oxide induction furnace and the change in length of the specimen was measured with telemicroscopes ...
T. H. Nielsen, M. H. Leipold
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Uniform precipitation of Yttria-Stabilized zirconia

Refractories, 1995
An experiment on precipitation of zirconia by urea, urotropin, and ammonium hydroxide precipitants is described. The morphological and phase composition of the precipitated powders are investigated. It is shown that a buffer has a positive effect on reducing the agglomeration.
V. Ya. Shevchenko, N. A. Mikhailina, A. D. Izotov, Lazarev Vladislav B, L. I. Podzorova, A. A. Il’icheva   +5 more
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EXAFS Study of Yttria‐Stabilized Zirconia

Journal of the American Ceramic Society, 1986
The local structural environments of Y3+ and Zr4+ in 18 wt% Y2O3‐stabilized zirconia were studied using extended X‐ray absorption fine structure spectroscopy over the temperature range –120° to 770°C. The measured cation‐oxygen distances reflect those of the parent oxides, with the mean Zr‐O distance 0.017 nm shorter than the mean Y‐O distance.
L. M. Moroney, Alan V. Chadwick, G. N. Greaves, C. R. A. Catlow   +3 more
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Conduction mechanism in yttria stabilized zirconia

Physics Letters A, 1967
Abstract Analysis of potential distribution curves in 10 Y 2 O 3 : 90 ZrO 2 at 1380°C has shown an electronic hole contribution to the conductivity to have an oxygen partial pressure dependence of p O 2 . This is postulated to arise from the reaction 1 2 O 2 ( gas ) + □ O 2 → O 2- + 2 h .
R.E.W. Casselton, J.C. Scott
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Ultrasonic attenuation in yttria-stabilized zirconia

Physica B: Condensed Matter, 1999
Abstract The acoustic attenuation at 10 MHz in yttria-stabilized zirconia (ZrO2(Y)) was measured at temperatures between 300 and 600 K. The attenuation curve showed a relaxation peak, from which the activation energy was estimated to be 0.7±0.07 eV , in good agreement with the value obtained from dielectric constant of 0.66±0.07 eV ...
Tatsuro Miyasato, Kohji Nobugai, Kenta Kirimoto   +2 more
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Interaction of NiO with yttria-stabilized zirconia

Solid State Ionics, 1997
Abstract As-prepared and heat treated plasma-produced 8 and 10 mol% yttria-stabilized zirconia (YSZ) powders doped with 0, 5, 10 and 75 mol% NiO have been investigated by XRD. The as-prepared powders are mixtures of metastable tetragonal and cubic phases but they transform to a single YSZ phase upon heat treatment above 1200 °C. The solubility of NiO
Søren Linderoth, A. Kuzjukevics
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Electrostatic dispersion of yttria-stabilized zirconia

Powder Technology, 1987
Abstract These results merely indicate that the isoelectric point for this powder is substantially different than that commonly accepted for ‘stabilized zirconia’. It is recommended that this difference be taken into account in designing process systems for the material.
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EXAFS Studies of Yttria Stabilized Zirconia

1984
Yttria stabilized zirconia is a well known solid electrolyte which exhibits fast anion conduction at elevated temperatures. Below 1200° C pure zirconia (ZrO2) is monoclinic, but forms a stabilized cubic phase with the fluorite structure in a solid solution with 9.4 to 24 mole percent Y2O3.
W.L. Roth, E. Canova, Alan I. Goldman, Y. H. Kao, R. Wong   +4 more
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Superplasticity in Zirconia and Yttria Stabilized Zirconia Mixed Powders

Materials Science Forum, 1999
Improved elongations were obtained for samples prepared from a novel powder of 2.5 mol % yttria stabilized zirconia when compared to the commercial powders used up to date. The novel powder consists of mixing two phases, zirconia and 6 mol % yttria stabilized zirconia particles to give an average composition of 2.5 mol % yttria.
Yuichi Ikuhara, Kazutaka Sasaki, Taketo Sakuma   +2 more
openaire   +2 more sources