Ceramic fibres from polymer precursor containing Si-O-Ti bonds
- 93 Downloads
Polycarbosilanes containing titanium alkoxide as pendant groups (atom ratio Ti/Si = 0.07 and 0.15) were synthesized. These polymers were melt-spun and then heat-treated in a vacuum, in oxygen or ammonia gas flow, resulting in Si-Ti-C-O, Si-Ti-0 and Si-Ti-O-N fibres, respectively. The pyrolysis process of the polymer is discussed in connection with the mechanical properties and the structure of the fibre. At high heat-treatment temperatures, β-SiC and TiC (in Si-Ti-C-O fibre), anatase (in Si-Ti-O fibre) and TiN (in Si-Ti-O-N fibre) crystallized, which may be closely related to the decomposition of the Si-O-Ti bond in the fibre.
KeywordsOxygen Polymer Ammonia Titanium Mechanical Property
Unable to display preview. Download preview PDF.
- 8.S. Sakka,Hyomen 19 (1981) 430.Google Scholar
- 9.W. C. LaCourse, “Better Ceramics Through Chemistry”, edited by C. J. Brinker, D. E. Clark and D. R. Ulrich (North-Holland, Amsterdam, 1984) p. 53.Google Scholar
- 11.T. Maki, T. Kokubo andS. Sakka,Bull. Inst. Chem. Res. Kyoto Univ. 64 (1986) 292.Google Scholar
- 14.K. Okamura, M. Sato, Y. Hasegawa andT. Amano,Chem. Lett. (1984) 2059.Google Scholar
- 16.M. Sato, Y. Hasegawa andK. Okamura,J. Ceram. Soc. Jpn Inter. Edn. 95 (1987) 937.Google Scholar