Foams Ceramic
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Cellular Ceramics Produced from Ceramic Shell: Processing and Characterization
In this work, ceramic shell (mullite source), an industrial solid waste from the lost-wax casting process, after crushing and milling steps, was used and evaluated as an alternative raw material source for the production of cellular ceramics for high temperature applications (> 1400 °C). The obtained ceramic shell powder, with particle size distribution (d5
Mat. Res.. Publicado em: 09/11/2017
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2. Preparation, Characterization and Biological Studies of Β-TCP and Β-TCP/Al2O3 Scaffolds Obtained by Gel-Casting of Foams
Replacement tissues for tissue engineering can be produced by seeding human cells onto scaffolds. In order to guarantee adequate bio-compatibility, porosity and mechanical resistance for promoting cellular growth, proliferation and differentiation within scaffold structures, it is necessary to investigate and improve materials and processing routes. β-trica
Mat. Res.. Publicado em: 22/05/2017
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3. Experience on a Low Cost Way to Obtainal-Ti Ceramic Foams
An experience on a simple process for producing alumina-rutile-mullite ceramic foams by using aqueous particulate slurries is proposed. The sintering process is achieved in one unique thermal process at 1200 ºC in air. The description of the process, physical properties and morphological studies are reported. Microstructure is studied by using confocal opti
Mat. Res.. Publicado em: 2015-08
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4. Fabricación y caracterización de espumas de alúmina para aplicación en quemadores porosos radiantes
In radiant porous burners, the heat source requires a solid porous matrix where the combustion reaction takes place, in which the heat transfer is performed more efficiently. This work is based on a study of the alumina suspension rheology, where parameters as viscosity and tixotropy were the guide to select the appropriate formulation for the ceramic foam f
Matéria (Rio J.). Publicado em: 2012
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5. Produção e caracterização de espumas cerâmicas obtidas a partir de lodo de anodização de alumínio
Ceramic foams were produced from a sludge generated in the aluminum anodizing process by using an industrial polyurethane foam (replication method) with open cell sizes of 10 ± 5 ppi (porosity = 97%) which were impregnated with suspensions containing 50-61 wt.% alumina, 1 wt.% citric acid, 6 wt.% bentonite and fired at 1600 ºC for 2 h. The aluminum anodizi
Química Nova. Publicado em: 2012
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6. Determinação das propriedades microestruturais de espumas industriais de SiC por transmissão de raios gama e microtomografia de raios-X
Espumas cerâmicas são amplamente utilizadas nas indústrias siderúrgica e aeroespacial. O conhecimento da estrutura interna desse material é extremamente importante para que seu uso seja realizado de forma adequada. Neste trabalho a estrutura interna de espumas industriais de carbeto de silício de densidades de poros de 30 ppi, 45, ppi, 60 ppi, 80 ppi e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2010
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7. Processamento e caracterização de espumas vitrocerâmicas do sistema sncp (Sio2-Na2o-Cao-P2 O5)
Glass-ceramics foams prepared from glasses of the SiO2-Na2O-CaO-P2O5 by replication process were obtained and characterized in terms of their chemical and physical properties by X-ray fluorescence, X-ray diffraction, laser diffraction, thermal analysis, density, mechanical strength, microstructural and cytotoxic analysis. The results showed that it is possib
Química Nova. Publicado em: 2010
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8. Study of morphology of ceramic foams / Estudo da morfologia de espumas cerâmicas
In this work will present the results obtained with quantification of parameters by means of histomorphometry techniques of ceramic foam samples. This quantification was done by means of two-dimensional image analysis techniques from image processing. The images analyzed in this work were obtained by scanning the faces of the samples using a conventional sca
Publicado em: 2010
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9. Obtenção e caracterização de espumas cerâmicas de alumina para uso como queimadores radiantes
Ceramic foams are cellular porous ceramics that can be produce by different methods, like replica method, sacrificial template method and direct foaming method. Foams are a type of porous ceramic which present many properties making them a very versatile material, used in different applications, like radiant porous burners. Radiant burners consist of ceramic
Publicado em: 2009
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10. Decomposição térmica de espumas de poliuretano para fabricação de vitrocerâmica celular de Li2O-ZrO2-SiO2-Al2O3 (LZSA)
Characterization of the thermal decomposition of polyurethane (PUR) foams was performed by Fourier-transformed infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). Three main weight loss paths were observed by TGA, the residue being lower than 3 wt.% for 3 different PUR foams analyzed. FT-IR spectra indicated CO2, CO, NH3 and isocyanides as ma
Química Nova. Publicado em: 2007-10
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11. Multidimensional modelling and calculation of combustion in porous media
In contrast with household heating systems based on open combustion flames, burners based on premixed combustion in inert porous media are characterized by higher thermal efficiency and high turndown ratio allied with compacity of the units. Moreover, porous burners, where a flame is anchored inside a porous matrix, are associated with low pollutants formati
Publicado em: 2005
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12. Ceramic foams porous microstructure characterization by X-ray microtomography
Knowledge of the porous structure of amorphous materials is of fundamental importance in calculating geometrical parameters such as total porosity, pore size distribution and physical parameters relating to fluid flow inside void space. The present work deals with the measurement of the microstructural parameters of porous ceramic filters. Microtomographic m
Materials Research. Publicado em: 2004-12