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Itens para a visualização no momento 11-20 of 20
Relaxação estrutural de vidros metassilicato de chumbo e dissilicato de lítio
(Universidade Federal de São Carlos, 2021-02-25)
Glasses are thermodynamically unstable and spontaneously relax towards the supercooled liquid state. The relaxation time varies from seconds at temperatures above the glass transition to geological times at room temperature. ...
Avaliação dos modelos numéricos para a simulação da secagem de concretos refratários
(Universidade Federal de São Carlos, 2021-02-25)
The drying of hydraulic bonded monolithic refractories is the slowest stage of their application process. Problems related to the control of such a procedure result in cracks, spalling and even, in extreme cases, explosions ...
Caracterização eletroquímica do eletrólito sólido NASICON Li1,5Al0,5Ge1,5(PO4)3 (LAGP)
(Universidade Federal de São Carlos, 2021-08-17)
Solutions to the environmental and social challenges of postmodern society converge on a common point: sustainability. Doing more with less and using environmentally friendly materials is imperative. Energy storage is ...
Nucleação e crescimento de cristais, difusão e relaxação estrutural em vidros 2Na2O.CaO.3SiO2 e 5BaO.8SiO2
(Universidade Federal de São Carlos, 2021-06-25)
Despite intensive research regarding glass crystallization, there are still flaws in the theories and especially in their application. Aiming to verify the applicability of the classical nucleation theory (CNT) and the ...
Avaliação da anomalia da teoria de nucleação clássica em vidros silicatos
(Universidade Federal de São Carlos, 2021-07-13)
Under some conditions, the Classical Nucleation Theory (CNT) provides a good description of the temperature dependence of the experimental homogeneous nucleation rates in supercooled liquids. Allegedly, however, it strongly ...
Coatings cerâmicos de alta emissividade como soluções energéticas para fornos industriais
(Universidade Federal de São Carlos, 2021-08-30)
Aiming at alternatives to reduce the impacts from the excessive consumption of non-renewable energy sources by the industrial sector, the present work highlights an important technological aspect with the development of ...
Método de controle de trajetória de atuadores ipmc baseados em nafion® utilizando técnica de visão de máquina em ambiente com umidade relativa controlada
(Universidade Federal de São Carlos, 2021-08-13)
Ionomeric polymer-metal composites (IPMC) consist of an electroactive polymeric matrix coated on both sides with a noble metal. When applying an electrical potential difference, the polymeric membrane changes its thickness, ...
Cristalização e relaxação em vidros óxidos uma tentativa de solução do Paradoxo de Kauzmann
(Universidade Federal de São Carlos, 2021-09-03)
The quest for a solution to Kauzmann’s Paradox has been a lifelong
journey for many glass scientists over the last seventy years. The idea that this
paradox may violate the Third Law of Thermodynamics is ...
On-line FTIR spectroscopy system for extrusion-based process analysis
(Universidade Federal de São Carlos, 2021-11-11)
Polymer processing is a fundamental key to achieve the desired properties to reach the needs of polymer applications. Thus, it is important to understand how the processing can contribute to material characteristics during ...
Efeito do tamanho e distribuição de tamanho inicial das partículas da hematita, na cinética de sinterização assistida por micro-ondas
(Universidade Federal de São Carlos, 2021-11-26)
This thesis aimed to study the effect of the initial particle size and its
distribution of hematite on microwave-assisted sintering kinetics. Two synthesis
methods were used: sol-gel and seeded-mediated growth. By sol-gel ...