Calcination And Sintering
Mostrando 1-12 de 15 artigos, teses e dissertações.
-
1. Estudo de obtenção da membrana cerâmica densa BaCeO3
RESUMO Nos últimos anos, pós cerâmicos à base de óxidos de estrutura do tipo perovskita ganharam atenção considerável devido às suas aplicações tecnológicas na área de membranas permeáveis de oxigênio. O óxido misto BaCeO3 apesenta-se como um material amplamente estudado em uma grande diversidade de aplicações, seja como materiais eletrolí
Matéria (Rio J.). Publicado em: 20/05/2019
-
2. In Situ Formation of Hydroxyapatite During Powder Metallurgy Preparation of Porous Ti/HA Nano Composite: A Candidate for Dental Implants
Porous Ti/HA nano-composite was prepared for implant fixtures and in situ formation of Hydroxyapatite. At first, Ca(OH)2 nanoparticles were synthesized by precipitation. Raw materials included Ca(NO3)2.4H2O, NaOH, a mixture of deionized water and ethanol. Synthesized Ca(OH)2 nano powder was mixed with (NH4)2HPO4 and the mixture was calcined at 700 ºC for 30
Mat. Res.. Publicado em: 28/05/2018
-
3. EVALUATION OF LIMESTONE IMPURITIES IN THE DESULFURIZATION PROCESS OF COAL COMBUSTION GAS
Abstract Limestones have been used to capture SO2 emitted during the combustion of coal for decades. However, due to the complexities of the variables involved in this process, many issues are still being studied. Some tests were performed in a fluidized bed reactor, which was used to evaluate the performance of the limestones in the bed for flue gas desulfu
Braz. J. Chem. Eng.. Publicado em: 2017-01
-
4. THE USE OF A HIGH LIMESTONE CONTENT MINING WASTE AS A SORBENT FOR CO2 CAPTURE
Abstract In this work, a high limestone content waste was evaluated as a potential material for CO2 capture. The influence of calcination conditions on the CO2 capture capacity was evaluated using 5 cycles of calcination-hydration-carbonation reactions. A Central Composite Design of Experiments was set using calcination temperatures and time as variables. Th
Braz. J. Chem. Eng.. Publicado em: 2016-09
-
5. EFFECT OF SORBENT PORE VOLUME ON THE CARBONATION REACTION OF LIME WITH CO2
Abstract The reaction of calcium oxide with carbon dioxide is one of the most important methods for the capture and concentration of greenhouse gas from the flue gases of industrial plants. In this work, the carbonation reaction of CaO obtained from various sources with CO2 was investigated by a thermogravimetric method. These sources include commercial lime
Braz. J. Chem. Eng.. Publicado em: 2016-06
-
6. CO Oxidation Catalyzed by Ag Nanoparticles Supported on SnO/CeO2
Ag-Sn/CeO2 catalysts were synthesized by the co-precipitation method with different Ag-Sn wt.% loadings and were tested for the oxidation of CO. The catalysts were characterized by powder X-ray diffractometry (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDS), and s
J. Braz. Chem. Soc.. Publicado em: 2015-04
-
7. Síntese de manganita dopada com estrôncio e cobaltita dopada com antimônio e caracterização microestrutural
The great variety of properties of oxides with the perovskite structure allows their application in several fields of technology. Specially, the electrochemical properties and the thermal stability of some of these compounds make these materials the most used in devices for energy generation such as the solid oxide fuel cells (SOFC). SOFC¿s are devices the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
8. âNova rota de sÃntese de nanopartÃculas de NiMn2O4 usando o MÃtodo Sol-Gel ProtÃicoâ / "New route of synthesis nanoparticles NiMn2O4 method using sol-gel protein."
This work presents a new route for the synthesis of nickel manganate (NiMn2O4) through the sol-gel protein method, using gelatin as an organic precursor. The synthesis of nanoparticles was performed by dilution of inorganic salts (NiCl2.6H2O, MnCl2.4H2O) and gelatin in distilled water with the addition of sodium hydroxide (NaOH). This solution was then place
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/01/2011
-
9. Synthesis and sintering of ZrO2 - 4,5%Y2O3 nanoparticles / Obtenção e sinterização de nanopartículas de ZrO2-4,5%Y2O3
The powders synthesis of yttria-stabilized zirconia by chemical methods has enabled the reduction in particle size for the submicrometer-sized scale. This reduction is to improve the electrical and mechanical responses of electrolyte fuel cells. Contributing in this research, this work was to study the effects of temperature elimination of organic phases, to
Publicado em: 2009
-
10. Preparação e caracterização de materiais ferroelétricos de composição Bi4Ti3O12 contendo Lantânio e Érbio / Synthesis and characterization of Bi4Ti3O12 ferroelectric materials containing Lanthanum and Erbium
This work describes a systematic study of the influence of the lanthanum atom addition in the Bi4Ti3O12 (BIT) phase and the erbium atom addition in the Bi3,25La0,75Ti3O12 (BLT075) phase in terms of their synthesis process and its structural, microstructural and electrical properties. Ceramics of nominal composition Bi4-xLaxTi3O12 (BLTx) with 0 x 2 mol% and B
Publicado em: 2009
-
11. Estudo do processamento do combustível UO2-7%Gd2O3 via mistura mecânica com reutilização de rejeitos do processo de fabricação e aditivo de densificação / UO 2 -7%Gd 2 O 3 FUEL PROCESS DEVELOPMENT BY MECHANICAL BLENDING WITH REPROCESSING OF WASTE PRODUCTS AND USAGE OF DENSIFICATION ADDITIVE
In the nuclear fuel cycle, reprocessing and storage of "burned" fuels, either temporary or permanent, demand high investments and, in addition, can potentially generate environmental problems. A strategy to decrease these problems is to adopt measures to reduce the amount of waste generated. The usage of integrated burnable poison based on gadolinium is a me
Publicado em: 2009
-
12. Síntese, caracterização estrutural, termoquímica e elétrica de materiais cerâmicos para células a combustível de óxido sólido / Synthesis, structural, thermochemical and electrical characterization of ceramic materials for solid oxide fuel cells
Nanocrystalline yttria or scandia stabilized zirconia (YSZ, ScSZ) powders with fluorite-type structure were synthesized by the polyacrylamide, the polymeric precursor and the precipitation methods. Powders were characterized by X-ray diffraction (XRD), simultaneous (TG and DTA or DSC) thermal analysis, nitrogen adsorption analysis, scanning electron microsco
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2008