Results 31 to 40 of about 6,256 (224)

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

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

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

Multiband orange-red photoluminescence of Eu3+ ions in new "114" LnBaZn(3)GaO(7) and LnBaZn(3)AlO(7) oxides [PDF]

, 2010
A new series of gallozincates LnBaZn(3)GaO(7) (Ln=La, Nd, Sm, Eu, Gd, Dy, Y) and new aluminozincates LnBaZn(3)AlO(7) (Ln=Y, Eu, Dy) have been synthesized.
Caignaert, V, Raveau, B, Saradhi, M P, Varadaraju, U V   +3 more
core   +1 more source

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

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

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

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

Influência do tipo de solvente na síntese de mulita pelo método Pechini

Cerâmica
Resumo Mulita é um aluminossilicato com grande importância na tecnologia cerâmica. Sua síntese através de métodos químicos tem sido extensivamente estudada, no entanto, não se observam estudos da sua obtenção pelo método Pechini.
A. N. S. Braga, V. N. Simões, H. L. Lira, G. A. Neves, R. R. Menezes   +4 more
doaj   +1 more source