Results 21 to 30 of about 2,706 (212)

Mechanical properties of partially stabilized zirconia for dental applications

Journal of Asian Ceramic Societies, 2019
In esthetic dental care, porcelain-fused-to-metal crowns have long been used for dental restoration. Since a dental prosthesis is placed in the harsh environment of the oral cavity over long periods, metal allergy due to eluate from the metal frame has ...
Hidekazu Tanaka, Toshihiko Maeda, Hisayoshi Narikiyo, Taro Morimoto   +3 more
doaj   +1 more source

Enhanced Activity and Stability of Gold/Ceria-Titania for the Low-Temperature Water-Gas Shift Reaction

Frontiers in Chemistry, 2019
Gold supported on ceria-zirconia is one of the most active low temperature water-gas shift catalysts reported to date but rapid deactivation occurs under reaction conditions.
James H. Carter, Parag M. Shah, Ewa Nowicka, Simon J. Freakley, David J. Morgan, Stan Golunski, Graham J. Hutchings   +6 more
doaj   +1 more source

Influence of Nanoscale Surface Arrangements on the Oxygen Transfer Ability of Ceria–Zirconia Mixed Oxide

Inorganics, 2020
Ceria-based materials, and particularly CeO2–ZrO2 (CZ) solid solutions are key ingredient in catalyst formulations for several applications due to the ability of ceria to easily cycling its oxidation state between Ce4+ and Ce3+.
Eleonora Aneggi, Carla de Leitenburg, Alessandro Trovarelli   +2 more
doaj   +1 more source

Síntese e caracterização de precursores de cério de alta pureza Synthesis and characterization of high purity cerium precursors

Cerâmica, 2001
Neste trabalho são destacadas as técnicas de separação e de purificação de terras raras por precipitação fracionada e troca iônica, além das técnicas usualmente utilizadas no controle analítico destes materiais.
C. A. S. Queiroz, D. M. Ávila, A. Abrão, E. N. S. Muccillo   +3 more
doaj   +1 more source

Mechanical and Electrical Characterization of 8YSZ-ScCeSZ Ceramics

Materials Research, 2023
The effects of small amounts (up to 5 wt.%) of scandia- and ceria-stabilized zirconia on the electrical conductivity, and the elastic modulus and hardness of yttria-stabilized zirconia were investigated by impedance spectroscopy and nanoindentation tests,
T. G. Fujimoto, V. Seriacopi, L. A. S. Ferreira, I. F. Machado, E. N. S. Muccillo   +4 more
doaj   +1 more source

Influence of roughness on initial in vitro response of cells to Al2O3/Ce-TZP nanocomposite

Journal of Asian Ceramic Societies, 2021
Al2O3/Ce-tetragonal zirconia polycrystal (TZP) nanocomposite was synthesized by a colloidal processing route and sintered in air atmosphere. Sandblasting treatment was made to alumina toughened zirconia (ATZ) nanocomposite in order to evaluate the ...
M. Suárez, S. Pérez-López, C. Prado, A. Fernández, J. S. Moya, R. Torrecillas, L. A. Díaz   +6 more
doaj   +1 more source

Phase separation and surface segregation in ceria–zirconia solid solutions [PDF]

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011
Using a combination of density functional theory calculations and statistical mechanics, we show that a wide range of intermediate compositions of ceria–zirconia solid solutions are thermodynamically metastable with respect to phase separation into Ce-rich and Zr-rich oxides.
Grau-Crespo, Ricardo, de Leeuw, Nora H., Hamad, Said, Waghmare, Umesh V.   +3 more
openaire   +2 more sources

Novel Ni/Ce(Ti)ZrO₂ Catalysts for Methane Dry Reforming Prepared in Supercritical Alcohol Media

Energies, 2020
To achieve a high activity and coking stability of nickel catalysts in dry reforming of methane, materials comprised of ceria–zirconia doped by Ti were investigated as supports.
Yuliya Bespalko, Ekaterina Smal, Mikhail Simonov, Konstantin Valeev, Valeria Fedorova, Tamara Krieger, Svetlana Cherepanova, Arcady Ishchenko, Vladimir Rogov, Vladislav Sadykov   +9 more
doaj   +1 more source

Supported nano gold as a recyclable catalyst for green, selective and efficient oxidation of alcohol using molecular oxygen

Orbital: The Electronic Journal of Chemistry, 2011
The myth that gold cannot act as a catalyst has been discarded in view of recent studies, which have demonstrated the high catalytic efficiency of pure nano-gold and supported nano-gold catalysts.
Bashir Dar, Mazahar Farooqui
doaj   +1 more source

Design and Evaluation of Zirconia Based Thermal Barrier Powders for Advanced Engines [PDF]

Engineering and Technology Journal, 2017
Advanced utility, diesel and turbines engines used widely in aerospace, chemical and oil industries are based on plasma sprayed thermal barrier coatings.
M. Kadhim, M. Hafiz, M. Ali Bash
doaj   +1 more source