Preparation and Properties of New Zirconium-Containing Silylacetylene Precursor for Ceramic Material

A novel complex phase ceramic precursor (GP) was prepared by adding zirconium based powder of polymer (HG) into the silicon source (HS),a silylacetylene precursor with H-Si-C≡C backbone which was prepared from the reaction of n-BuLi,trichloroethylene,methyl hydrogen dichlorosilane and lithium aluminum hydride.The structure of HS was characterized by FT-IR and NMR.The curing behavior and thermal oxidation performance of GP were fully investigated by FT-IR,DSC and TGA,while the ceramic performance was investigated by XRD and Raman.The results showed that GP exhibited excellent thermal stability and ceramic performance,and it could turn into complex phase ceramics composed of ZrC-ZrO₂-SiC with a yield of 75.64% after being sintered at 1 600℃ in Ar for 3 h.