摘要
The preparation method of precursor for SiC was improved. Polyborazine-polymethylsilane(PBN-PMS) was obtained by reaction of PMS with 1%(mass fraction) PBN; and then soluble polymeric precursor PBN-PCS-PMS was prepared by hybridization of the PBN-PMS with a suitable amount of PCS(polycarbosilane). Silicon carbide material was obtained by pyrolysis of the PBN-PCS-PMS in inert atmosphere at 1 400 ℃. XRD, elemental analysis, 29Si and 13C MAS NMR indicated it is a near-stoichiometric β-SiC when the mass ratio of PCS to PBN-PMS is 0.25∶1.00.
The preparation method of precursor for SiC was improved. Polyborazine-polymethylsilane(PBN-PMS) was obtained by reaction of PMS with 1%(mass fraction) PBN; and then soluble polymeric precursor PBN-PCS-PMS was prepared by hybridization of the PBN-PMS with a suitable amount of PCS(polycarbosilane). Silicon carbide material was obtained by pyrolysis of the PBN-PCS-PMS in inert atmosphere at 1 400 ℃. XRD, elemental analysis, 29Si and 13C MAS NMR indicated it is a near-stoichiometric β-SiC when the mass ratio of PCS to PBN-PMS is 0.25∶1.00.
出处
《应用化学》
CAS
CSCD
北大核心
2004年第7期731-733,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金 ( 5 9972 0 42 )资助项目
关键词
碳化硅
聚碳硅烷
聚甲基硅烷
聚环硼氮烷
silicon carbide,polycarbosilane,polymethylsilane,polyborazine
