Results 211 to 220 of about 96,778 (262)

Thermal evolution of ceria-zirconia metallorganic precursors

Thermochimica Acta, 1982
Abstract Ceria-zirconia tetragonal solid solutions were obtained by using gelled metallorganic precursors as starting materials. By drying these gels, intimately mixed powders of a quasi-amorphous nature were obtained. On firing, the tetragonal solid solution sintered directly without any separation of the single oxides.
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Oxygen sensing with mesoporous ceria–zirconia solid solutions

Sensors and Actuators B: Chemical, 2009
Abstract Mesoporous ceria and ceria–zirconia solid solutions are synthesized and tested as an oxygen sensor. Two structures were selected for this study i.e. KIT-6 and SBA-15. Solid solutions are prepared through making replicas of synthesized mesoporous silica where these templates were impregnated with precursor materials.
S. Abdollahzadeh Ghom, C. Zamani, S. Nazarpour, T. Andreu, J.R. Morante   +4 more
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Solubility Limits of Ceria-Zirconia-Lanthana Solid-Solutions

Materials Today: Proceedings, 2017
Abstract We demonstrate, the solubility limits of Ceria-Zirconia-Lanthana (CZLa) solid-solutions with the increase in heat-treatment temperature from 600°C to 1300°C. CZLa nano-crystalline samples were successfully synthesized by EDTA-Citrate complex method and were characterized by Raman Spectroscopy (RS) and Transmission Electron Microscopy (TEM ...
Zenab Abbas, Mythili Surendran, P.A. Anjana, null P.K.Jidev, Harshini Dasari, N. Sudhakar Naidu, S. Anandhan, K.Udaya Bhat, G.Uday Bhaskar Babu, Hari Prasad Dasari   +9 more
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Microstructural investigation of ceria-zirconia solid solution with oxygen vacancies

Journal of Electron Microscopy, 2003
The microstructural change in CeO2-ZrO2 solid solution (Ce2Zr2O7 + x; 0 < or = x < or = 1) with an ordered arrangement of Ce and Zr associated with the absorption/release of oxygen was observed by transmission electron microscopy (TEM). The oxidation of Ce2Zr2O7 was observed in TEM by electron diffraction analysis.
Tsuyoshi, Sasaki, Yoshio, Ukyo, Kotaro, Kuroda, Shigeo, Arai, Hiroyasu, Saka   +4 more
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Flame synthesis of nanocrystalline ceria–zirconia: effect of carrier liquid

Chemical Communications, 2003
Spraying cerium and zirconium precursors dissolved in carboxylic acids into a methane-oxygen flame resulted in well-structured nanocrystals of ceria-zirconia mixed oxides with high temperature stability and surface area.
Wendelin J, Stark, Lutz, Mädler, Marek, Maciejewski, Sotiris E, Pratsinis, Alfons, Baiker   +4 more
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Synthesis of nanostructured ceria, zirconia and ceria–zirconia solid solutions using an ultrahigh surface area carbon material as a template

Nanotechnology, 2004
Nanostructured ceria, zirconia and ceria-zirconia solid solutions have been synthesized via an easy route and characterized by XRD, nitrogen physorption, Raman spectroscopy and TEM. The route involves two steps: the impregnation of ultrahigh surface area carbon materials with nitrate solutions of ceria and/or zirconia and burn-off to remove the carbon ...
Changhai Liang, Jieshan Qiu, Zhonglai Li, Can Li   +3 more
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Nanoscale Heterogeneity in Ceria Zirconia with Low-Temperature Redox Properties

The Journal of Physical Chemistry B, 2006
We have investigated nanoscale compositional and structural variations in Ce(0.5)Zr(0.5)O(2) samples with different redox properties. Different samples were prepared using a spray freezing technique, and the synthesis conditions were varied to yield materials with reduction temperatures in the range of 400-750 degrees C.
Ruigang, Wang, Peter A, Crozier, Renu, Sharma, James B, Adams   +3 more
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Characterisation of ceria–zirconia solid solutions after hydrothermal ageing

Applied Catalysis A: General, 2001
Abstract Ce1−xZrxO2 (x=0–0.84) solid solutions prepared by co-precipitation were characterised after calcination at 700 or 900°C, and after hydrothermal ageing at 1000 or 1200°C. The solid solutions were formed at 700°C, and crystallise as cubic or tetragonal phases depending on their compositions. Despite the rather high surface areas obtained after
Christine Bozo, François Gaillard, Nolven Guilhaume   +2 more
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Interfacial Structure and Point Defects in Ceria/Zirconia Superlattices

MRS Proceedings, 2006
AbstractWe report the results of a molecular dynamics simulation study aiming to understand the interfacial structure in ceria/zirconia superlattices and the impact of the interfaces on the energies of oxygen vacancy formation and Gd ion substitution in ceria and zirconia layers of the superlattice structure.
Michael Dyer, Anter El-Azab, Fei Gao
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Ru-doped ceria–zirconia mixed oxides catalyze soot combustion

Reaction Kinetics, Mechanisms and Catalysis, 2013
We used ceria-based catalysts to reduce the soot combustion temperature from 600 °C to values included in the operation range of diesel exhausts (270–400 °C). We synthesized CeO2–ZrO2 by the sol–gel method and effectively deposited the mixed oxide on cordierite.
L. F. Nascimento, R. F. Martins, R. F. Silva, P. C. de Sousa Filho, O. A. Serra   +4 more
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