Results 31 to 40 of about 1,887 (217)

Preparation of La2Zr2O7 ceramic from Egyptian black sand

Journal of Radiation Research and Applied Sciences, 2018
Lanthanum zirconates has been suggested as a thermal barrier coating for many high temperature applications. This work is focusing on the possibility of La2Zr2O7 from economic natural resources using Egyptian monazite and zircon.
Mohammed Y. Elkady, Ashraf A. Mohmed, A.M.E. Daher, Wafaa H. Saleh, S. Negm, H. Mashaal   +5 more
doaj   +1 more source

Chemical Preparation Routes and Lowering the Sintering Temperature of Ceramics

Ceramics, 2020
Chemically and thermally stable ceramics are required for many applications. Many characteristics (electrochemical stability, high thermomechanical properties, etc.) directly or indirectly imply the use of refractory materials.
Philippe Colomban
doaj   +1 more source

Synthesis of complex oxides Eu₂О₃–Gd₂О₃–Zr(Hf)О₂ using microwave radiation and study of their properties

Тонкие химические технологии
Objectives. The authors synthesize complex oxide phases of the composition Eu2−xGdxZr2O7 and Eu2−xGdxHf2O7 at x = 0.5, 1.0, 1.5 under microwave heating conditions and investigate their phase composition, particle size distribution, and specific surface ...
N. V. Grechishnikov, E. E. Nikishina
doaj   +1 more source

High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials

Journal of Advanced Ceramics, 2019
High-entropy pyrochlore-type structures based on rare-earth zirconates are successfully produced by conventional solid-state reaction method. Six rare-earth oxides (La2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, and Y2O3) and ZrO2 are used as the raw powders.
Fei Li, Lin Zhou, Ji-Xuan Liu, Yongcheng Liang, Guo-Jun Zhang   +4 more
doaj   +1 more source

Ab initio data-analytics study of carbon-dioxide activation on semiconductor oxide surfaces [PDF]

, 2020
The excessive emissions of carbon dioxide (CO$_2$) into the atmosphere threaten to shift the CO$_2$ cycle planet-wide and induce unpredictable climate changes.
Ghiringhelli, Luca M., Illas, Francesc, Levchenko, Sergey V., Mazheika, Aliaksei, Scheffler, Matthias, Valero, Rosendo, Vines, Francesc, Wang, Yanggang   +7 more
core   +3 more sources

Key insights on the structural characterization of textured Er2O3–ZrO2 nano-oxides prepared by a surfactant-free solvothermal route [PDF]

, 2012
Zirconia-mixed oxides can exhibit cubic fluorite and pyrochlore structure. Their discrimination is not easy in nanooxides with a crystal size close to that of a few unit cells.
Calvino, Jose J., Cordoncillo, Eloisa, De la Luz, Verónica, Escribano López, Purificación, Gonell, Francisco, Julian-Lopez, Beatriz, López-Haro, Miguel   +6 more
core   +2 more sources

Cation non-stoichiometry in yttrium-doped barium zirconate: phase behavior, microstructure, and proton conductivity [PDF]

, 2010
Recent literature indicates that cation non-stoichiometry in proton-conducting perovskite oxides (ABO_3) can strongly influence their transport properties.
Haile, Sossina M., Hernandez-Sanchez, Raul, Yamazaki, Yoshihiro   +2 more
core   +1 more source

Process—structure correlations in co-precipitation synthesized lanthanum zirconates

Materials Research Express
Rare Earth Zirconates with pyrochlore/flourite structure have attracted interests owing to their immense potential in modern technological applications.
Saideep Shirish Bhat, K A Irshad, Mahima Almeida, M Sivakumar, P Vairavel, S C Gurumurthy, Raghavendra K G   +6 more
doaj   +1 more source

Fabrication and characterization of high entropy pyrochlore ceramics

Boletín de la Sociedad Española de Cerámica y Vidrio, 2023
High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate ...
Branko Matović, Dejan Zagorac, Ivana Cvijović-Alagić, Jelena Zagorac, Svetlana Butulija, Jelena Erčić, Ondrej Hanzel, Richard Sedlák, Maksym Lisnichuk, Peter Tatarko   +9 more
doaj   +1 more source

High Total Proton Conductivity in Large-Grained Yttrium-Doped Barium Zirconate [PDF]

, 2009
Barium zirconate has attracted particular attention among candidate proton conducting electrolyte materials for fuel cells and other electrochemical applications because of its chemical stability, mechanical robustness, and high bulk proton conductivity.
Haile, Sossina M., Hernandez-Sanchez, Raul, Yamazaki, Yoshihiro   +2 more
core   +1 more source