全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

硼氢化反应合成聚硼硅氮烷和热压成型-热解制备SiBCN陶瓷

Full-Text   Cite this paper   Add to My Lib

Abstract:

对甲基乙烯基二氯硅烷(MeViSiCl2)进行氨解形成聚甲基乙烯基硅氮烷(PMVS),进而用二甲基硫醚硼烷(BH3-SMe2)和PMVS进行硼氢化反应,合成出SiBCN陶瓷的前驱体聚硼硅氮烷(polyborosilazane,PBSZ)。Fourier红外光谱分析表明合成的PBSZ中有C-B-C和Si-N特征吸收峰,分别对应HC-B(CH)-CH和≡Si-NH-基团;11B和29Si的核磁共振分析产物中有BC3,SiN2C2,SiN3C和SiC3N等结构单元,这些光谱结果表明合成的产物为PBSZ。对PBSZ热压成型,在1000℃氩气中热解制备出SiBCN陶瓷体。PBSZ的热重分析表明氩气中1300℃热解的陶瓷产率为52.6%。陶瓷局部致密,表明用前驱体热解法有望获得致密的SiBCN陶瓷体。

References

[1]  WEINMANN M,KAMPHOWE T W,SCHUHMACHER J,et al.Design of polymeric Si-B-C-N ceramic precursors for application in fiber-reinforced composite materials[J].Chem Mater,2000,12:2112-2122. [2]SU K,REMSEN E E,ZANK G A,et al.Synthesis,characterization,and ceramic conversion reactions of borazine-modified hydridopolysi-lazanes:new polymeric precursors to SiNCB ceramic composites[J].Chem Mater,1993,5:547-556. [3]MüLLER A,GERSTEL P,WEINMANN M,et al.Correlation of boron content and high temperature stability in Si-B-C-N ceramics[J].J Eur Ceram Soc,2000,20:2655-2659. [4]LEE J,BUTT D P,BANEY R H,et al.Synthesis and pyrolysis of novel polysilazane to SiBCN ceramic[J].J Non-Cryst Solids,2005,351:2995-3005. [5]唐云,王军,李效东.新型SiBNC陶瓷先驱体—聚硼硅氮烷的合成与表征[J].化学学报,2008,66(11):1371-1376.TANG Yun,WANG Jun,LI Xiaodong.Acta Chim Sin(in Chinese),2008,66(11):1371-1376. [6]RIEDEL R,KIENZLE A,DRESSLER W,et al.A siliconboron carbo-nitride ceramic stable to2000℃[J].Nature,1996,382:796-798. [7]WEINMANN M,HAUG R,BILL J,et al.Boron-modified polysilyl-carbodi-imides as precursors for Si-B-C-N ceramics:synthesis,plas-tic-forming and high-temperature behavior[J].Appl Organomet Chem,1998,12:725-734. [8]RIEDEL R,RUWISCH L,AN L,et al.Amorphous siliconboron car-bonitride ceramic with very high viscosity at temperatures above1-500℃[J].J Am Ceram Soc,1998,81:3341-3344. [9]SCHMIDT W R,NARSAVAGE-HEALD D M,JONES D M,et al.Poly(borosilazane)precursors to ceramic nanocomposites[J].Chem Mater,1999,11:1455-1464. [10]SCHUHMACHER J,BERGER F,WEINMANN M,et al.Solid-state NMR and FTIR studies of the preparation of Si-B-C-N ceramics from boron-modified polysilazanes[J].Appl Organomet Chem,2001,15:809-819. [11]SCHIAVON M A,SORAR?G D,YOSHIDA I V P.Poly(borosi-lazanes)as precursors of Si-B-C-N glasses:synthesis and high tem-perature properties[J].J Non-Cryst Solids,2004,348:156-161. [12]LEE S H,WEINMANN M,ALDINGER F.Processing and properties of C/Si-B-C-N fiber-reinforced ceramic matrix composites prepared by precursor impregnation and pyrolysis[J].Acta Mater,2008,56:1529-1538.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133