Synthesis and Characterization of a Novel Preceramic Polymer for SiBNC-Ti Ceramics

A ceramic precursor (PBSZ-Ti) with different Ti content for preparing SiBNC-Ti ceramics was synthesized by the polymer-derived method, with dicyclopentadienyltitanium dichloride, trichlorosilane, hexamethyldisilazane and boron trichloride as starting materials. FT-IR, NMR, EA and XPS were employed to characterize the compositions and structures of PBSZ-Ti and SiBNC-Ti ceramics, which indicated that PBSZ-Ti contained Si–N–B and B–N six-membered ring structures, and Ti element was successfully introduced into the polymeric structure. The micro-morphology and high temperature crystallization behavior of SiBNC-Ti ceramics were studied by XRD, Raman and SEM. The results show that the surface of the SiBNC-Ti ceramic is smooth and dense. The amorphous state of SiBNC-Ti ceramics could be maintained to 1500 °C in a N 2 atmosphere and 1300 °C in air.