Os pesquisadores e colaboradores da Aptor Software Rener Baffa da Silva e Bruno Rangel participaram da 4th International Conference on Computer Supported Education (CSEDU), realizada na cidade do Porto, em Portugal, entre os dias 16 e 18 de abril de 2012...
Uma parceria entre o Centro Multidisciplinar para o Desenvolvimento de Materiais Cerâmicos (CMDMC), uma unidade de pesquisa financiada pela Fapesp e instalada no Instituto de Química (IQ) da Unesp de Araraquara, e a empresa Angelus, de Londrina (PR), resultou no desenvolvimento de um pino odontológico translúcido.
Sensitivity of SnO2 non-ohmic behaviour to the sintering process and to the addition of La2O3
reported here consisted of a study of the sensitivity of the nonlinear electrical properties of dense SnO2.CoO ceramic systems to low concentrations of La2O3, sintering temperature and cooling rates. The nonlinear electrical properties of these systems were found to increase with decreasing cooling rates, a behavior attributed to the CoO solid state reactions at temperatures below 1000C. Post-annealing treatment in N2-rich atmospheres strongly decreases the non-ohmic behavior of SnO2.CoO ceramic systems. However, this behavior may be restored through thermal treatment in an O2-rich atmosphere
Marcelo Moizinho Oliveira, PAULO ROBERTO BUENO, Maria Rita de Cassia Santos, Elson Longo, José Arana Varela
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