Synthesis of SiCN@TiO2 core-shell ceramic microspheres via PDCs method

Herein, we report a SiCN@TiO2 core-shell ceramic microspheres, which was fabricated via a facile and effective polymer-derived ceramics (PDCs) emulsification-crosslinking-pyrolysis method. The PVSZ@TiO2 core-shell microspheres were first prepared via an emulsification-crosslinking-pyrolysis process and then pyrolyzed in argon atmosphere at 800 °C, 1000 °C, 1200 °C and 1400 °C respectively. The spherical shape and the rough surface of the resulting SiCN@TiO2 core-shell ceramic microspheres at 1400 °C still retained. It was believed that the SiCN@TiO2 ceramic microspheres have promising potential applications in the fields of high-temperature thermal insulation coatings or infrared opacifiers for inorganic aerogel, because of the high thermal stability and light-scattering ability.177