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Synthesis and pyrolysis of Ti‐containing precursors for advanced Si/C/N/Ti‐based ceramics
Author(s) -
Zheng Zhimin,
Li Yongming,
Luo Yongming,
Su Shunxing,
Zhang Zhijie,
Yang Shiyan,
Gao Wei,
Xie Zemin
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20311
Subject(s) - pyrolytic carbon , titanium tetrachloride , pyrolysis , titanium , fourier transform infrared spectroscopy , ceramic , materials science , yield (engineering) , nitrogen , polymer chemistry , nuclear chemistry , organic chemistry , chemical engineering , chemistry , metallurgy , engineering
A new kind of polytitanosilazane (PTSZ) precursor for Si/C/N/Ti‐based ceramic was synthesized from the condensation reaction of silazane lithium salts and titanium tetrachloride (TiCl 4 ). Titanium in the precursors was bonded to silazane compounds in the Si—N—Ti bond. The obtained PTSZs were characterized by Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR), and elemental analyses. The PTSZs were pyrolyzed at 900 to 1300°C under nitrogen, argon, and ammonia atmosphere, respectively, to give amorphous inorganic products. The results indicated that ceramic yields of PTSZs were much higher than that of their corresponding silazane oligomers and ceramic yields increased with the increase in Ti content in PTSZs. Precursors containing reactive vinyl groups gave higher pyrolytic yields. The pyrolytic yield under ammonia is lower than that under nitrogen and argon. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 2733–2739, 2004