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Condutividade iônica e atividade termodinâmica em vidros x AgI (1-x) AgPO3, 0 ≤ x ≤ 0,5
(Universidade Federal de São Carlos, 2012-09-14)
The ionic conductivity in solids is known since the 19th century, but the
mechanisms of charge carriers transportation in amorphus solids is not yet fully
known. The control of ths property is especially important for ...
Comportamento elétrico de nanocompósitos baseados em copolímeros em bloco e nanotubos de carbono
(Universidade Federal de São Carlos, 2017-06-23)
In this work conductive polymer nanocomposites (CPNs) based on block copolymers and multi walled carbon nanotubes (MWCNT) were obtained. Two of the copolymers were commercial: polystyrene-b-polybutadiene-b-polystyrene ...
Síntese de cerâmicas tipo perovskita com potencial uso em células solares
(Universidade Federal de São Carlos, 2017-03-07)
Visible light accounts for the biggest fraction of the solar irradiance. One of the strategies for achieving higher photovoltaic power conversion efficiency is the application of low band-gap materials (Eg ideal≈1.4 eV) ...
Desenvolvimento e caracterização de concretos refratários ligados quimicamente por fosfatos para aplicação em indústrias petroquímicas
(Universidade Federal de São Carlos, 2017-10-05)
The objective of this work was the development of chemically phosphatebonded
refractories for applications in petrochemical industries due to their
suitable properties such as high green mechanical strength, erosion ...
Propriedades de armazenagem de hidrogênio do intermetálico TiFe processado por moagem de alta energia e laminação a frio sob atmosfera controlada
(Universidade Federal de São Carlos, 2017-03-27)
TiFe is a material of practical interest for hydrogen storage due to its absorption capacity of ~ 1.9 wt. % H at room temperature and the relative low cost of its constituent elements. However, this intermetallic requires ...
Efeitos das condições de queima e densidade aparente sobre a sobrequeima em porcelanatos
(Universidade Federal de São Carlos, 2015-08-05)
The phenomenon of overfiring manifests in porcelain tiles and other
products with high degree of vitrification, as a consequence of the expansion of
gases trapped in closed pores, in the final stages of sintering. When ...
Sinterização por micro-ondas em uma e em duas etapas de varistores à base de ZnO
(Universidade Federal de São Carlos, 2013-09-30)
This thesis is aimed at one-step microwave sintering at frequencies of 2.45 GHz and 30 GHz and the development of two-step microwave sintering (MW-TSS) at 2.45 GHz of ZnO-based nanostructured semiconductor compositions for ...
Desvulcanização termomecânica contínua de borracha natural da banda de rodagem de pneus automotivos por meio do processo de extrusão em rosca dupla
(Universidade Federal de São Carlos, 2015-09-10)
The Natural rubber is a renewable source material widely used in the manufacture of automotive tire tread. The vulcanization results in a high thermodynamic stability and wide working range materials. However, after the ...
Deformação piroplástica em porcelanatos
(Universidade Federal de São Carlos, 2016-09-09)
In recent years porcelain stoneware tiles showed the highest growth in
production and consumption in ceramic industry sector. To achieve low
porosity, which ensures the high performance of the product, is required ...
Caracterização experimental e simulação computacional das deformações induzidas na fusão e cristalização do PTFE
(Universidade Federal de São Carlos, 2016-03-07)
Polytetrafluoroethylene (PTFE) has excellent properties such as chemical inertness
and useful mechanical properties at high and low temperatures. After melt,
the PTFE viscosity is so high that the extrusion and injection ...