Results 41 to 50 of about 2,315 (212)

Síntese e caracterização de nanopartículas de TiO2 Synthesis and characterization of TiO2 nanoparticles

Cerâmica, 2006
Vários métodos de síntese química têm sido desenvolvidos e utilizados na obtenção de pós para fabricação de membranas cerâmicas. Dentre os métodos alternativos utilizados em escala de laboratório, o método Pechini tem sido empregado com sucesso para a ...
A. C. F. M. Costa, M. A. Vilar, H. L. Lira, R. H. G. A. Kiminami, L. Gama   +4 more
doaj   +1 more source

Carbon Coking‐Tolerant Perovskite Catalyst Nd0.9Mg0.1Fe0.4Ni0.6O3 for Efficient Methane Dry Reforming

Carbon and Hydrogen, EarlyView.
A new perovskite‐type catalyst Nd0.9Mg0.1Fe0.4Ni0.6O3 was developed for methane dry reforming, which exhibited 93.1% CH4 and 94.7% CO2 conversion with 100 h stability run and excellent anti‐coking capability, benefited from in situ exsolved Fe‐Ni alloy nanoparticles. ABSTRACT Perovskite with high temperature stability and tunability is a very promising
Zhenjie Wang, Xingchao Dai, Xinjiang Cui
wiley   +1 more source

Transition Metal Compounds as Thermochromic Materials: Classification, Properties, Limitations, and Applications

EcoEnergy, EarlyView.
This review systematically examines how different transition metal compounds—such as binary and multinary metal oxides, halides, sulfides, and salts—exhibit thermochromism based on the d‐electron configurations of their transition metal cations. It focuses on three main mechanisms of thermochromism: phase transition, charge transfer, and bandgap change.
Jie Wang, Shan Wang, Long Yuan, Ling Zuo, Hui Qi, Changmin Hou   +5 more
wiley   +1 more source

Luminescence in undoped CaYAl3O7 produced via the Pechini method

Physica B: Condensed Matter, 2017
Abstract The luminescent properties of CaYAl3O7 (CYAM) were carried out in undoped powder samples produced via Pechini method. The thermal analysis combined with XRD measurements showed that 1000 °C/4 h is the best condition for the CYAM synthesis. Morphological analysis showed submicrometric particles with irregular shape.
Giordano F.C. Bispo, Adriano B. Andrade, Claudiane dos S Bezerra, Verônica C. Teixeira, Douglas Galante, Mário E.G. Valerio   +5 more
openaire   +1 more source

Entropy‐Driven Innovations: Entropy Stabilized Oxides for High‐Performance Next‐Generation Lithium–Sulfur Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This article explores high‐entropy‐stabilized oxides (HEOs) as novel functional materials for addressing critical issues in lithium–sulfur (Li–S) batteries, including lithium polysulfide (LPS) shuttling, inadequate conductivity, and slow redox kinetics.
Hassan Raza, Jialiang Wei, Zhicai Wang, Zhaoyang Lv, Junye Cheng, Jia Xu, Liang An, Yuliang Liu, Sergey Ryazantsev, Shukui Li, Guangping Zheng   +10 more
wiley   +1 more source

Influência do vanádio nas propriedades morfológicas estruturais e fotoluminescentes do titanato de zinco (Zn2TiO4) Influence of vanadium on the morphological, structural and photoluminescent properties of zinc titanate - Zn2TiO4

Cerâmica, 2005
Neste trabalho o método do precursor polimérico foi usado para obter a fase Zn2TiO4 dopada com V5+. As fases foram obtidas depois que o pó precursor foi submetido a diferentes temperaturas; a caracterização do composto foi feita por meio de difração de ...
A. C. Chaves, M. S. C. Câmara, L. L. M. Sales, A . G. Araújo, I. M. G. Santos, D. M. A. Melo, E. Longo   +6 more
doaj   +1 more source

Nanocubes and Cuboctahedra: Entropic Stabilization Versus Thermal Segregation in Rock Salt‐ and Spinel‐Type Multinary Oxides from Spray‐Flame Synthesis

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Spray‐flame synthesis enables highly flexible and scalable production of multinary and high‐entropy oxide nanoparticles due to high synthesis temperatures with subsequent quenching. Temperature‐dependent in situ diffraction of as‐synthesized materials clearly reveals entropy stabilization in rock salt lattices, while spinels—featuring tetrahedral and ...
Mohammed‐Ali Sheikh, Steven Angel, Sabrina Schleich, Leon Müller, Jan Ternieden, Hatem M. A. Amin, Christof Schulz, Hartmut Wiggers   +7 more
wiley   +1 more source

NiO Dissolution in Molten Carbonate Fuel Cell Cathodes: Challenges and Strategies for Long‐Term Stability

ChemElectroChem, Volume 13, Issue 13, 2 July 2026.
Molten carbonate fuel cells (MCFCs) enable efficient power generation and CO2 capture but suffer from nickel oxide (NiO) cathode dissolution, which limits lifetime. This review summarizes strategies to mitigate NiO degradation, including coatings, doping, alternative cathode materials, and electrolyte modification.
Kosar Hasanpoursorkhdehi, Michele Maragliano, Dario Bove, Barbara Bosio   +3 more
wiley   +1 more source

Raman Spectra and Structural Data of the Nanocrystalline KTP $(KTiOPO_4)$ Synthesized by Pechini Method

, 2009
Nanocrystalline KTP powders are synthesized using a modified Pechini method. The structural and lattice modes of the products are investigated via X-ray diffraction, micro Raman backscattering spectroscopy, UV/vis/NIR and FT-IR transmission spectroscopy.
Khanzadeh, M., Malekfar, R., Cheraghi, A., Ahmadi, G.   +3 more
core   +1 more source

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