Results 21 to 30 of about 3,506 (171)

Synthesis of Barium Titanate by a Basic pH Pechini Process

, 1992
Barium titanate powders and thin films have been processed by the conventional acid pH Pechini process and a modified basic pH Pechini process. Higher pH of the starting solution resulted in significantly finer grains in the sintered thin films.
Gary L. Messing, Suresh Kumar
core   +1 more source

Pós nanométricos de BaZrO3: preparação e caracterização de cerâmicas BaZrO3 nanometric powders: preparation and characterization of ceramics

Cerâmica, 2005
Cerâmicas de BaZrO3 foram produzidas a partir de pós sintetizados pelo método de Pechini modificado. Os pós apresentaram tamanho médio de partícula de ~130 nm e 100% de fase cristalina de BaZrO3 depois de tratados termicamente a 800 °C / 2h.
E. Antonelli, M. I. B. Bernardi, A. C. Hernandes   +2 more
doaj   +1 more source

Conductividad y evaluación microestructural de Electrolitos sólidos SGDC sintetizados por Pechini y precipitación controlada [PDF]

, 2021
In this work, controlled precipitation synthesis methods and polymeric precursors (Pechini) were used to obtain gadolinium-doped cerium oxide solid electrolytes (Ce0.8Gd0.2O1.9) and double-doped cerium oxide with gadolinium and samarium (Ce0.8Gd0.2 ...
Paiva, José Antônio Euzébio, Ferreira, Jorge Luiz de Almeida, Daza, Paola Cristina Cajas, Meneses, Rodrigo Arbey Muñoz, Araújo, José Alexander, Silva, Cosme Roberto Moreira da   +5 more
core   +1 more source

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

Rheological properties of gels for Pechini syntheses

, 2009
This work deals with preparation of layers of ceramic materials – perovskites. The introductory part includes general characteristics concerning structure, properties and use of this materials.
Wirthová, Michaela
core   +2 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

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

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

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

Using the design experiment RSM for the preparation of nanoparticles containing pyrazinamide, ethambutol and rifampin [PDF]

شیمی کاربردی روز, 2018
In this study, three-component nanoparticles of iron, nickel and lithium were synthesized with two methods of combined technique (co-precipitation, hydrothermal) and pechini sol-gel.
Fariba Tadayon, reza jamshidi, parisa Jamshidpoor   +2 more
doaj   +1 more source