Artículos de revistas
Porous Ceramic Materials From Polysiloxane-Clay Composites
Journal Of The Brazilian Chemical Society. Soc Brasileira Quimica, v. 25, n. 4, n. 716, n. 725, 2014.
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)This study describes the structural, porosity and morphological changes of porous polymer-derived ceramics obtained by pyrolysis of polysiloxane-clay composites, containing a pore former based on poly(dimethylsiloxane) and nickel acetate as nanostructure inductor. The composites were blended in a steel mold, thermally treated at 950 degrees C and 1500 degrees C (inert atmosphere). The increase of the temperature together with the presence of Ni resulted in more crystalline and porous ceramics and a higher ordering process of C-free phase in the Ni-containing sample. The ceramics revealed a wide pore size distribution, from micro to macropores. At 950 degrees C the ceramic revealed the presence of pores and Ni- and C-rich islands dispersed on the fracture surface. However, at 1500 degrees C, nanowires with large aspect ratio, constituted by Si, C and O elements were generated. Thus, the presence of Ni associated to higher pores amount gave rise to an appropriate environment for the nucleation and growth of SiCO nanowires.254716725Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FAPESP [05/58460-0, 03/09926-1]CNPq [Proc. 305916/2006-8]
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Bond strength of a resin cement to high-alumina and zirconia-reinforced ceramics: The effect of surface conditioning Valandro, Luiz Felipe; Özcan, Mutlu; Bottino, Marco Cícero; Bottino, Marco Antonio; Scotti, Roberto; Della Bona, Alvaro
Silva, O. M M; Souza, J. V C; Nono, M. C A; Martins, G. V.; Ribeiro, M. V.; Machado, J. P B
Bond strength of a resin cement to high-alumina and zirconia-reinforced ceramics: The effect of surface conditioning Federal University of Santa Maria; University of Groningen; Materials Science and Technology Center; Universidade Estadual Paulista (UNESP); University of Bologna; University of Passo Fundo; Faculty of Medical Sciences (2006-07-13)Purpose: The aim of this study was to evaluate the effect of two surface conditioning methods on the microtensile bond strength of a resin cement to three high-strength core ceramics: high alumina-based (In-Ceram Alumina, ...