Search
Now showing items 41-50 of 78
Obtenção e condutividade elétrica de vitrocerâmica Li1+xAlxTi2-x(PO4)3 com diferentes microestruturas
(Universidade Federal de São Carlos, 2009-08-21)
Technological advances in portable devices imply not only the development of devices but also the need to enhance their power sources. For instance, cellular phones with high technology incorporating Bluetooth, Infrared, ...
Condutividade elétrica da solução sólida céria-zircônia dopada com ítrio e gadolínio
(Universidade Federal de São Carlos, 2009-09-10)
Rare earth doped ceria has a great potential to be used as electrolyte in temperatures around 800 °C in fuel cells due to its higher electrical conductivity than YSZ. However, the reduction of Ce+4 to Ce+3 in low oxygen ...
Efeito dos materiais do backing bar na geometria e dureza de juntas soldadas por FSW em ligas de alumínio 6013 e 2024
(Universidade Federal de São Carlos, 2009-08-12)
Solid-state joining techniques such as Friction Stir Welding (FSW) are a natural choice to produce weld low heat input, limited slight distortion and low microstructural and mechanical degradation. Great effort has currently ...
Estudo da reação de formação do pigmento cerâmico azul (V-ZrSiO4) a partir de SiO2, ZrO2 e V2O5
(Universidade Federal de São Carlos, 2005-04-08)
The present work aimed to study the process of synthesis of one of the most important ceramic pigments manufactured by the traditional method of oxide mixture: the turquoise blue of vanadium doped zircon. The plan proposed ...
Grau de cisão de cadeia na degradação termomecânica de polímeros sob multiplas extrusões
(Universidade Federal de São Carlos, 2004-09-14)
One of the ways to follow the polymer degradation has been to calculate the average number of chain scissions (ns) that occurred during its
thermomechanical history. The average can be extended for each molecular weight ...
Síntese e caracterização de nanopartículas de óxido de estanho (SnO2) obtidas a partir de suspensões coloidais.
(Universidade Federal de São Carlos, 2004-09-23)
A novel chemical route was use to obtain colloidal suspensions of SnO2 nanoparticles. The synthesis is based on the hydrolysis reaction of tin chloride (II), and allows the preparation of nanocrystals at room temperature. ...
Projeto e operação de cubas eletrolíticas para a indústria de alumínio
(Universidade Federal de São Carlos, 2006-04-26)
The Brazilian aluminum industry is ranked among the sixth biggest aluminum producers worldwide and plays an important role in the local market. Continuous improvement in aluminum industry points to more metal output at ...
Formação de grãos ferríticos ultrafinos através de transformação de fase induzida por deformação
(Universidade Federal de São Carlos, 2007-10-26)
One of the key points in steel development has been the refinement of the microstructure, however without change the chemical composition with addition of alloy elements. The refinement of the ferrite grain size leads ...
Estudo de tendências e oportunidades no desenvolvimento sustentável para a reciclagem de veículos e seus materiais.
(Universidade Federal de São Carlos, 2004-09-27)
The present study has the purpose of identifing and analysing the tendencies of vehicle recycling technologies focusing on shredder residue, PVC and heavy metals due to the importance of this area to the development ...
Sílica coloidal como agente ligante e fonte mulitizadora em concretos refratários
(Universidade Federal de São Carlos, 2009-03-03)
The recent development of refractory castables for high temperatures applications are closely related to binders technology, especially those presenting superior performance and installation properties. The calcium aluminate ...