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Nanoprocesses in polymer‐derived Si–O–C ceramics: Electronmicroscopic observations and reaction kinetics
Author(s) -
Berger A.,
Pippel E.,
Woltersdorf J.,
Scheffler M.,
Cromme P.,
Greil P.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200521201
Subject(s) - ceramic , materials science , pyrolysis , microstructure , polymer , chemical engineering , nanowire , filler (materials) , amorphous solid , carbon nanotube , silicon , kinetics , carbon fibers , composite material , nanotechnology , composite number , chemistry , crystallography , metallurgy , physics , quantum mechanics , engineering
Abstract Nickel acetate doped poly(methylphenylsilsesquioxane) with and without silicon filler loading was pyrolysed in argon atmosphere between 800 and 1500 °C. The ceramic residues were investigated with specific view of the nanoaggregates formed in pores during the polymer‐to‐ceramic conversion. After pyrolysis at 900 °C carbon nanotubes as well as nanowires with a crystalline SiC core and an amorphous SiO 2 shell were found in Si filler‐free and Si filler‐loaded samples, respectively. The evolution of the microstructure and the composition of these carbon nanotubes and SiC/SiO 2 nanowires were studied by HREM, SEM, EELS, EFTEM and evolved gas analysis. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)