Obtenção de cerâmicas estruturais com propriedades ópticas, baseadas em métodos químicos, processo de réplica (biotemplates) e recobrimento tipo core-shell

Abstract

Deepening the knowledge of materials science gave the man the development of new technologies and improvement of existing in many different areas such as aerospace, electronics, nuclear and many others and that now require materials with exceptionally high quality. In this study, Al2O3-ZrO2 particles were obtained by nano-encapsulation with a layer of zirconia on the surface of alumina particles by the polymeric precursor method, as well as structural ceramics based on zirconia, both the optical properties were tested. The synthesized materials were characterized by XRD, nitrogen physisorption, scanning electron microscopy, transmission electron microscopy, and photoluminescence. The scanning electron micrographs showed core-shell structures in the presence of agglomerated particles. The structural ceramics, in scanning microscopy showed a replica of the original material. Photoluminescence spectroscopy in the addition of ZrO2 significantly affect the emission intensity, showing that the application of this material in the semiconductor area is possible. It was also noted that the use of different organic templates affects the emission intensity of photoluminescence. The results showed that the method was efficient and suitable for ceramic composites and structural ceramics functionalized base metal oxides.