A new borazine-type single source precursor for Si/B/N/C ceramics

Jäschke, T.; Jansen, M.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

A new borazine-type single source precursor for Si/B/N/C ceramics

MPS-Authors

/persons/resource/persons280094

Jäschke, T.
Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280091

Jansen, M.
Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Jäschke, T., & Jansen, M. (2006). A new borazine-type single source precursor for Si/B/N/C ceramics. Journal of Materials Chemistry, 16(27), 2792-2799.

Cite as: https://hdl.handle.net/21.11116/0000-000E-FFDF-9

Abstract

The new borazine derivative [ B{CH(CH3)(SiCl3)} NH](3) (TSEB) was
prepared by reacting Cl3Si - CH(CH3) - BCl2 (TSDE) with
hexamethyldisilazane (hmds) at ambient conditions. TSEB was
characterized by infrared spectroscopy (IR), nuclear magnetic resonance
(NMR), and by mass spectrometry (MS). The specially designed molecule
serves as a single source precursor for the synthesis of a highly
durable Si/B/N/ C ceramic material via the well known 'polymer route'.
Pursuing this philosophy, polymerization of TSEB with methylamine as
the cross-linking reagent has lead to a highly homogeneous pre-ceramic
polymer, which was further characterized by spectroscopic methods.
Subsequent thermal degradation of the as-obtained polyborocarbosilazane
was monitored by means of DTA/TG/MS up to 1400 degrees C. The resulting
amorphous silicon boron carbonitride of the approximate elemental
composition Si3B3N5C4 exhibits an outstanding thermal durability at
2000 degrees C under inert conditions and is also stable in pure oxygen
up to at least 1300 degrees C. The ceramic material still contains
borazine rings from the TSEB precursor molecule embedded in the
covalent Si/B/N/ C network, acting as rigid structural units which
reinforce the ceramic material on an atomic scale.