Thermal Evaporation
Mostrando 37-48 de 65 artigos, teses e dissertações.
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37. Sistema de secagem solar para frutos tropicais e modelagem da secagem de banana em um secador de coluna estática / Solar drying system for tropical fruits and a model for drying bananas in a static column dryer
In this study were projected, built and tested an electric solar dryer consisting of a solar collector, a drying chamber, an exhaust fan and a fan to promote forced hot air convection. Banana drying experiments were also carried out in a static column dryer to model the drying and to obtain parameters that can be used as a first approximation in the modeling
Publicado em: 2008
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38. Avaliação da eficacia de materiais texteis na atividade fisica / Evaluation of textile materials efficiency in physical activity
The present study Evaluation of Textile Materials Efficiency in Physical Activity compared how the different properties of fibers, like cotton and polyamide 6.6, affect sportive performance. The purpose of this study was to evaluate the improvement of physical performance during physical activities due the use of clothing made with high technology fabric
Publicado em: 2008
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39. Análise de termossifões que operam com mercúrio em altas temperaturas
Thermosyphons are high thermal conductivity devices that can transfer high quantities of heat when subjected to small temperature gradients. In its most simple form, a thermosyphon is a hollow evacuated metal pipe, charged by a pre-determined amount of an appropriate working fluid. It can be divided into three main sections: evaporator, where the heat is del
Publicado em: 2008
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40. Propriedades magnÃticas e Ãpticas de filmes finos rugosos
In this dissertation we study the influence of susbtrate roughness on the magnetic and optical properties of polycrystalline permalloy (Py) films and the optical properties of thin silver (Ag) films, when deposited on this support. The surface roughness of the glass substrates was generated by chemical attack with high concentration flouridic acid vapor (HF-
Publicado em: 2008
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41. Compósitos cerâmicos porosos de alumina - zircônia para aplicação em sistemas de controle térmico para satélites: obtenção e caracterização / Alumina-zirconia porous ceramic composites for application in satellite thermal control systems: obtaining and characterization
To control the temperature of satellites are used various thermal control heat systems. The Loop Heat pipe (LHP) are being developed at the DEM (Space Mechanic and Control Division) of the INPE (National Institute for Space Research) an apparatus for passive heat control of the satellites components. The main components of the LHP system are: capillary evapo
Publicado em: 2008
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42. SÃntese e caracterizaÃÃo de filmes finos de ITO e de silÃcio poroso
Desenvolveu-se um processo de produÃÃo de filmes finos de Ãxido de Ãndio dopado com estanho (ITO) com espessuras tÃpicas de 120 nm, depositados em substratos de vidro pela tÃcnica de evaporaÃÃo tÃrmica reativa (ETR). Os efeitos da pressÃo parcial de oxigÃnio durante a deposiÃÃo e do tratamento tÃrmico em oxigÃnio nas propriedades elÃtricas, e
Publicado em: 2008
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43. Characterization of thin titanium oxite films for ISFET application / Caracterização de filmes finos de oxido de titanio obtidos atraves de RTP par aplicação em ISFETs
This work presents the characterization of thin titanium oxide films as potential dielectric to be applied in ion sensitive field effect transistors. The films were obtained through rapid thermal oxidation and annealing of titanium thin films of different thicknesses deposited by Ebeam evaporation on silicon wafers. These films were analyzed by Ellipsometry,
Publicado em: 2008
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44. Study of organic light-emitting devices using rare earth and transition metals complexes. / Estudo de dispositivos orgânicos emissores de luz empregando complexos de terras raras e de metais de transição.
This work presents the study of the Rare Earth (RE) and Transition Metals (TM) complexes, as emissive layers of Organic Light-Emitting Devices (OLEDs) designed, built and electro-optically characterized. The thin films were thermally evaporated or spin-coated. This research started with the study of Europium complex changing its central ligand (CL), which sh
Publicado em: 2008
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45. Power calibration of the TRIGA mark I nuclear research reactor
This paper presents the results and methodology used to calibrate the thermal power of the TRIGA Mark I IPR-R1 Research Reactor at the Nuclear Technology Development Centre (CDTN), in Belo Horizonte, Brazil. The TRIGA Mark I is a pool type reactor, cooled by water natural convection. The method used in the calibration consisted in the steady-state energy bal
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-09
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46. Síntese e caracterização da ferrita de MnZn obtida pelo método dos citratos precursores
It was synthesized MnZn ferrite with general formulae Mn1-xZnxFe2O4 (mol%), 0,3 ≤ x ≤ 0,7 by using the citrate precursor method. The precursors decomposition was studied by thermogravimetric analysis (TGA), differential thermogravimetric analysis (DTG), differential thermal analysis (DTA) and Fourier transform infrared (FTIR) of powder calcined a
Publicado em: 2007
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47. OrientaÃÃo de anticorpos em alumÃnio empregando monocamadas auto-organizadas para produÃÃo de microssensores capacitativos
There is a growing demand for in situ monitoring of antigen-antibody interaction. Immunosensors based on antigenâantibody interaction have attracted great interest in recent years in various areas. Numerous techniques such as optical, mass-sensitive and electrochemical have been employed for this purpose. Among the electrochemical techniques, a capacitive m
Publicado em: 2007
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48. Study of charge transport layers in polymer light emitting diodes. / Estudo de camadas transportadoras de cargas em diodos emissores de luz poliméricos.
In the present work, the study of the optical and electrical properties of polymeric electroluminescent devices known as Polymer Light-Emitting Diodes (PLEDs) and the development of Hole Transport Layers (HTLs) to promote an increase of the electrical efficiency of the devices was performed. PLEDs were constructed with structures like Anode/HTL/Electrolumine
Publicado em: 2007