Synthesis and thermal behavior of polymeric precursor for carbon‐free silicon oxynitride ceramic

Abstract

A new polymeric precursor, perhydropolysiloxazane (PSNO), for silicon oxynitride (SiON) ceramic was synthesized by a simple one-pot procedure involving partial hydrolysis of H 2 SiCl 2 and the following ammonolysis reaction of the hydrolyzed intermediates with NH 3 . The structure of new polymer was characterized with perhydropolysiloxane (PHSO) and perhydropolysilazane (PHSN) as reference substances. The conversion of PSNO to ceramic was investigated by TGA, FT-IR, and solid 29 Si-NMR analyses. A Si-rich Si 2 N 2 O ceramic was produced upon pyrolysis of PSNO at 1400 C under N 2 atmosphere.

Preparation and properties of novel hybrid resins based on acetylene‐functional benzoxazine and polyvinylsilazane

“…Polyvinylsilazane (PSN) was prepared as reported . The number average molecular weight ( M n ) of PSN is 843, with a polydispersity distribution index of 2.4.…”

“…As a kind of polymeric precursor for ceramic, polyvinylsilazane (PSN), prepared in our laboratory as reported, which contains Si inorganic component and produces a thermally robust organic–inorganic hybrid material with a SiN backbone and organic side groups above 400°C through solidification and pyrolysis, may also enhance the thermal stability of polybenzoxazine.…”

The synthesis of SiCON ceramics through precursor method

“…The absorption at 1257 cm −1 is due to SiCH 3 and at 1171 cm −1 is due to SiNHSi. The absorption at 1068, 944, and 767 cm −1 are separately due to SiOSi, SiNSi, and NSi 3 , respectively 11, 12. From the comparison of the three precursors, with water content increased in the raw materials, the intensity of SiOSi structure increased.…”