Abstract: SiO_2/Resorcinol hybrid sol was prepared by sol-gel method using TEOS and resorcinol as raw materials, and SiO_2/resorcinol hybrid fiber was prepared by drawing method. The hybrid fiber was characterized by FT-IR, DSC, TG, XRD and SEM. The results showed that partial resorcinol is linked silica with coralent bonds and the fiber was amorphous. The hybrid fiber was pyrolyzed at 600～1300 ℃ under atmosphere, the FT-IR, XRD and SEM showed that the hybrid fiber convert into porous SiO_2/SiC fiber when it was heated at 1300 ℃.

Key words: SiO_2/Resorcinol hybrid sol was prepared by sol-gel method using TEOS and resorcinol as raw materials, and SiO_2/resorcinol hybrid fiber was prepared by drawing method. The hybrid fiber was characterized by FT-IR, DSC, TG, XRD and SEM. The results showed that partial resorcinol is linked silica with coralent bonds and the fiber was amorphous. The hybrid fiber was pyrolyzed at 600～1300 ℃ under atmosphere, the FT-IR, XRD and SEM showed that the hybrid fiber convert into porous SiO_2/SiC fiber when it was heated at 1300 ℃.