Results 31 to 40 of about 6,144 (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

Síntese e caracterização de espinélios à base de ferritas com gelatina como agente direcionador Synthesis and characterization of ferrite-base spinels with gelatin as directing agent

Cerâmica, 2011
As ferritas com estrutura tipo espinélio compreendem um grupo de materiais magnéticos muito bem estabelecidos. Contudo, melhoramentos e inovações continuam acontecendo visando novas aplicações e otimização das técnicas de preparação.
A. F. Costa, P. M. Pimentel, D. M. A. Melo, M. A. F. Melo, F. M. Aquino   +4 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

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

Investigation of Graded La2NiO4+ Cathodes to Improve SOFC Electrochemical Performance [PDF]

, 2010
Mixed ionic and electronic conducting MIEC oxides are promising materials for use as cathodes in solid oxide fuel cells SOFCs due to their enhanced electrocatalytic activity compared with electronic conducting oxides.
F. Ansart, M. A. Laguna-Bercero, M. Rieu, P. Lenormand, Pechini, R. Sayers, S. J. Skinner   +6 more
core   +2 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

Nano‐ and Micro‐Sized Solid Materials Used as Antiviral Agents

Advanced Functional Materials, EarlyView.
Due to the rise of viral infections in humans and possible viral outbreaks, the use of nano‐ or micro‐sized materials as antiviral agents is rapidly increasing. This review explores their antiviral properties against RNA and DNA viruses, either as a prevention or a treatment tool, by delving into their mechanisms of action and how to properly assess ...
Orfeas‐Evangelos Plastiras, Imelda Raczkiewicz, Peggy Bouquet, Jean‐Philippe Dacquin, Jeremy Dhainaut, Anne Goffard, Christophe Volkringer   +6 more
wiley   +1 more source

Caracterização do pigmento de ZnCr2O4 sintetizado pelo método dos precursores poliméricos

Cerâmica, 2014
O pigmento de cromita de zinco foi sintetizado pelo método Pechini. Inicialmente, realizou-se um estudo de análise termodinâmica, visando prever os detalhes operacionais para síntese do pigmento pelo método de co-precipitação química.
E. V. Senatore, S. F. Santos, T. Ogasawara   +2 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

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