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Concretos refratários nanoligados para aplicação em unidades de craqueamento catalítico
(Universidade Federal de São Carlos, 2013-09-24)
In the petrochemical industry gasoline and LPG are produced in the fluid catalytic cracking unit (FCCU). The cracking occurs by the contact of crude oil with fluidized fine particles of a ceramic catalyst. The process ...
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 ...
Aplicação do resíduo de bauxita como fonte de Al2O3 e Fe2O3 na preparação de clínqueres de cimentos portland
(Universidade Federal de São Carlos, 2013-03-19)
During the past decades, the bauxite residue (BR) generated in the aluminium production was considered unusable waste. However, the difficulties and the costs associated with the residue management and storage have motivated ...
Desenvolvimento da microestrutura do BaCeO3 dopado com ítrio sob a influência do ZnO como aditivo de sinterização: correlação com a condutividade protônica
(Universidade Federal de São Carlos, 2013-12-13)
Yttrium-doped barium cerate perovskites are promising electrolyte for solid oxide fuel cell (SOFC) due to high proton conductivity at intermediate temperature, 400-600°C. However, the proton conductivity is not an intrinsic ...
Aplicação e avaliação de critérios semi-empíricos para o desenvolvimento de novas ligas vítreas do sistema Ti-Cu-Ni
(Universidade Federal de São Carlos, 2013-06-26)
The selection of good glass forming compositions is not a simple undertaking and many groups work on models and theoretical approximations in order to predict or at least guide the laborious and expensive experimental ...
Tratamentos de superfícies em Ti-CP, Ti-6Al-4V e Ti-6Al- 7Nb visando a osseointegração de implantes: propriedades das superfícies e respostas osteoblásticas
(Universidade Federal de São Carlos, 2013-07-10)
The aim of this study was to evaluate the properties of the surfaces of CP-Ti, Ti-6Al-4V, Ti-6Al-7Nb alloys modified via chemical treatments, as well as evaluating the behavior of human osteoblastic cells as function of ...
Desenvolvimento de concentrados de PVC reforçados com fibras de vidro longas (LF-PVC) para reforçar compostos de PVC rígido moldados por injeção
(Universidade Federal de São Carlos, 2013-12-06)
This work presents a study and development of long glass fiber PVC pellet concentrate (LF-PVC) manufactured by extrusion similar wire coating technique to reinforce pelletized rigid PVC compounds to produce injection molding ...
Fotoluminescência dos compostos (Ba1-xSrx)MoO4 sintetizados com diferentes solventes
(Universidade Federal de São Carlos, 2013-10-15)
The molybdates with scheelite-type tetragonal structure is a family of inorganic materials that has received considerable attention since the discovery of their luminescent properties, with emission in the visible spectral ...
Caracterização elétrica e microestrutural de vitrocerâmicas condutoras por íon lítio com estrutura NASICON
(Universidade Federal de São Carlos, 2013-07-22)
This doctoral thesis presents results of the chemical, thermal, structural, microstructural and electrical characterization of glass and glass-ceramics with Li1,3Al0,3Ti1,7(PO4)3 (LATP), Li1,5Al0,5Ge1,5(PO4)3 (LAGP) and ...
Síntese e processamento de titânia nanoestruturada
(Universidade Federal de São Carlos, 2013-05-09)
The TiO2 is widely used in several applications. In recent times these applications have been enhanced with the use of the nanotechnology. In this work, the sol-gel synthesis process, at low temperature, of TiO2 nanoparticles ...