Results 31 to 40 of about 6,175 (227)

Pechini synthesis and microstructure of nickel-doped copper chromites [PDF]

Materials Research, 2005
Spinel-type solid solutions were synthesized by the Pechini method and calcined between 500 and 900 °C for 4 hours and at 900 °C for 8 hours to produce ceramic pigments. The resulting powders were characterized by thermogravimetric analysis, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM ...
Pimentel, Patrícia Mendonça, Martinelli, Antonio Eduardo, Melo, Dulce Maria de Araújo, Pedrosa, Anne Michelle Garrido, Cunha, Jardel Dantas, Silva Júnior, Carlos Neco da   +5 more
openaire   +5 more sources

Influencia de parámetros de síntesis sobre las características de los polvos cerámicos nanométricos del compuesto Sr_xBa_1-xNb₂O₆ (SBN)

Boletín de la Sociedad Española de Cerámica y Vidrio, 2013
Results on the synthesis process of nanometric ceramic powders of the SrxBa1-xNb2O6 compound (SBN) for two values of x (0.33 and 0.50), and two synthesis methods (Pechini and controlled coprecipitation) are presented.
Gaona J, S. , Muñoz, J. R., Raigoza, C.F.V. , Ramirez S., A. , Caneiro, A.   +4 more
doaj   +1 more source

A Comparison of the Role of the Chelating Agent on the Structure of Lithium Conducting Solid Electrolyte Li_1.4Al_0.4Ti_1.6(PO₄)₃: Pechini vs. Modified Pechini-Type Methods

Batteries, 2020
In recent years, solid lithium-ion conductors have been widely studied because of their applications as electrodes and solid electrolytes in rechargeable lithium-ion batteries.
Mohammad Reza Ghaani, Amir Masoud Mohtasebi, Razie Tajeri, Pirooz Marashi   +3 more
doaj   +1 more source

Intermediate temperature SOFC single cell test using Nd1.95NiO4+δ as cathode [PDF]

, 2007
This work deals with SOFC single cell tests using neodymium nickelate Nd1.95NiO4+δ as cathode material. This MIEC oxide exhibits high values of both surface exchange coefficient (k) and oxygen diffusion coefficient (D*), as well as high electronic ...
Ansart, Florence, Bassat, Jean-Marc, Fontaine, Marie-Laure, Grenier, Jean-Claude, Lalanne, Cécile, Mauvy, Fabrice, Siebert, Elisabeth, Stevens, Philippe   +7 more
core   +5 more sources

Photocatalytic activity of visible light active Sr-hexaferrite prepared by solid-state reaction and the pechini methods

Materials Research Express, 2023
In this work, strontium hexaferrite (SrFe _12 O _19 ) was prepared using two different methods, the solid-state reaction and the sol–gel pechini methods.
M F Ramírez Ayala, A M Herrera-González, T J Pérez-Juache, V E Salazar-Muñoz, D Espericueta, J G Cabal-Velarde, J H García-Gallegos, A Lobo-Guerrero   +7 more
doaj   +1 more source

Modelling of the radiative properties of an opaque porous ceramic layer [PDF]

, 2010
Solid Oxide Fuel Cells (SOFCs) operate at temperatures above 1,100 K where radiation effects can be significant. Therefore, an accurate thermal model of an SOFC requires the inclusion of the contribution of thermal radiation.
B Rousseau, B Rousseau, B Rousseau, B Rousseau, Benoit Rousseau, DA Aspnes, DAG Bruggeman, Domingos De Sousa Meneses, Florence Ansart, Hector Gomart, JM Bassat, KJ Daun, M Greenblatt, Mathilde Rieu, O Rozenbaum, Pascal Lenormand, Patrick Echegut, Romain Dugas, S Castillo, S Murthy, T Chartier   +20 more
core   +3 more sources

Pechini Synthesis of Nanostructured Li1.05M0.02Mn1.98O4 (M = Al3+ or Ga3+) [PDF]

Materials Research, 2015
Doped Li1.05M0.02Mn1.98O4 (M = Ga3+ or Al3+) were prepared by Pechini synthesis using lithium and manganese acetates, citric acid, ethylene glycol, and the respective oxide or acetate of the doping ions in molar ratios of 2.00 (Mn1.98 + M0.02) to 1.05 Li.
Amaral, Fábio Augusto, Santana, Laiane Kálita, Campos, Iury Oliveira, Fagundes, Wélique Silva, Xavier, Farlon Felipe Silva, Canobre, Sheila Cristina   +5 more
openaire   +4 more sources

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Avaliação de argilas pura e impregnada com SnO2 como catalisador para a produção de biodiesel

Cerâmica, 2015
ResumoA versatilidade de materiais naturais como as argilas tem chamado a atenção para a sua aplicação em estudos científicos. Neste trabalho foi avaliado o enriquecimento dessas propriedades com a impregnação de SnO2 na superfície desse material, e seu ...
A. M. Neris, D. Araújo, Y. Cavalcante, A. F. F Farias, K. F. Moura, A. A. Cutrin, J. D. S. S. Nascimento, E. Longo, A. G. Souza, I. M. G. Santos   +9 more
doaj   +1 more source

Manifestation of vortex depinning transition in nonlinear current-voltage characteristics of polycrystalline superconductor Y_{1-x}Pr_{x}Ba_2Cu_3O_7 [PDF]

, 2008
We present our recent results on the temperature dependence of current-voltage characteristics for polycrystalline Y_{1-x}Pr_{x}Ba_2Cu_3O_7 superconductors with x = 0.0, 0.1 and 0.3. The experimental results are found to be reasonably well fitted for all
Ammirata, Ausloos, C. Stari, E. Marega, F.M. Araújo-Moreira, Guo, Halperin, Khasanov, Khasanov, Kosterlitz, Medvedyeva, Pierson, Poole, Prester, Repaci, S. Sergeenkov, Tinkham, V.A.G. Rivera   +17 more
core   +2 more sources