Resumo: Materiais da família ACu3Ti4O12 (ACTO) são potenciais candidatos para aplicaçao como dielétricos em capacitores cerâmicos devido aos seus altíssimos valores de constante dielétrica (ε’), podendo chegar a 105 à temperatura ambiente. Entretanto, a origem […]
Sensors of poisonous gas such as NO2, O3 and NH3 are widely encompassed for environmental monitoring, fire detection, safety, food quality control and many others relevant areas. Nitrogen dioxide, ozone and ammonia are three of […]
Neste seminário, serão apresentados os principais fundamentos físicos envolvidos no fenômeno de absorção de raios-X. Através de exemplos, apresentaremos as vantagens e desvantagens do uso da técnica de XAS na caracterização estrutural de Materiais. Seminarista: […]
A seminarista que dará início ao ciclo neste semestre é a doutoranda Ariadne Catto, orientanda do Prof. Valmor Mastelaro. Todos os alunos e membros do CCMC estão convidados, além do público externo. O objetivo do […]
On this third technical talk we will discuss some techniques on Scannig Probe Microscopy that can be hanful in characterisation of ceramics. Topography and roughness are routinely measured using Atomic Force Microscopy (AFM), nevertheless electric […]
Following our technical seminars and based on grad students’ suggestions, we will discuss image processing and grain analysis using microscopy. An image is a piece of data and should be treated as such. How an […]
EDS has been widely used in materials characterization, mainly due to its versatility, short time of analysis and capability of sub-micro or nanometric resolution. A good comprehension about the fundamentals of the technique as well […]
FAST ONE-STEP SYNTHESIS AND SINTERING OF MATERIALS PROMOTED BY ELECTRIC FIELDS Functional dielectric materials have a wide range of applications in electro-electronic devices such as capacitors, oxygen sensors and varistors, frequently in the form of […]
Strontium titanate is a perovskite structure material widely studied. The possibility of creation of oxigen vacancies in the structure of this compound , increase significatively their physical properties like: electric conductivity, physical stability and photoluminescence. […]
Vitrocerâmicas contendo cristais de diopsita (CaMgSi2O6 = CMS2) tem sido consideradas promissoras para diferentes aplicações. Entretanto, quando tratado termicamente, o vidro de diopsita de composição CMS2 exibe somente cristalização superficial. Uma maneira de se obter […]
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