Results 41 to 50 of about 2,931 (212)

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

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

Gallium-doped zinc oxide prepared by the Pechini method

, 2002
Óxido de zinco dopado com gálio (ZnO:Ga) foi preparado pelo método Pechini a partir de citrato de zinco e hidróxido de gálio. Utilizsando este método, foi possível obter ZnO:Ga cristalino pela calcinação do precursor polimérico em ar a 900ºC por 4 horas.
Davolos, Marian Rosaly, Gonçalves, Agnaldo de Souza [UNESP], Lima, Sergio Antonio Marques de [UNESP], Gonçalves, Agnaldo de Souza, Davolos, Marian Rosaly [UNESP], Lima, Sergio Antonio Marques de   +5 more
core   +2 more sources

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

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

The characterization of the barium titanate ceramic powders prepared by the Pechini type reaction route and mechanically assisted synthesis

, 2010
BaTiO3 ceramic powders were prepared by a complex method based on the Pechini type reaction route and mechanically assisted synthesis. In both ways BaTiO3 ceramics were sintered after 120 min on 1300 degrees C without pre-calcination steps.
Dohcević-Mitrović, Zorana, Romčević, Nebojša, Lazarević, Zorica Z, Stojanović, Biljana D, Vijatović Petrović, Mirjana, Romčević, Maja, Paunović, Novica   +6 more
core   +1 more source

Materiais cerâmicos catalíticos à base de hexa-aluminato de metais alcalino terrosos (Ba e Ca): síntese e análise estrutural

Cerâmica, 2015
ResumoO objetivo desse trabalho é desenvolver catalisadores cerâmicos compostos por hexa-aluminatos de metais alcalinos terrosos (Ca e Ba) - CaAl12O19 e BaAl12O19, respectivamente, na forma de pó cerâmico, por meio dos métodos de síntese Pechini e da ...
L. S. Neiva, C. R. P. B. Borges, M. I. Brasileiro, L. M. Novaes, A. M. Cabral, J. B. L. Oliveira   +5 more
doaj   +1 more source

PECHINI SYNTHESIS AND CHARACTERIZATION OF Eu3+ DOPED ZnCo2O4 SPINELS [PDF]

Periódico Tchê Química, 2005
Spinel oxides with the composition ZnCo2O4 and ZnCo2O4:Eu3+ have been synthesized by the Pechini method and characterized by X-ray diffraction, infrared spectroscopy, thermal analysis and scanning electron microscopy. IR spectroscopy revealed the presence of n1 and n2 bands, typical of spinel structures.
Pimentel, P.M., Pedrosa, A.M.G., Souza, H.K.S., Júnior, C.N.S., Pinto, R.C.A., Melo, D.M.A.   +5 more
openaire   +2 more sources