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Investigations on surface reactivity of silicon-carbonitride powders by thermoanalytical methods

: Breuning, T.; Neumann, A.; Boden, G.

Dufour, L.-C.:
Reactivity of solids. Proceedings of the 13th International Symposium 1996. Part 2: Processes at interfaces and surfaces. Formation and reactivity of organic and polymer materials. Applied processes and energy technology. Materials exhibiting novel specific properties. Thermochemical reactivity
Amsterdam: North-Holland, 1997 (Solid state ionics 101/103)
International Symposium on the Reactivity of Solids (ISRS) <13, 1996, Hamburg>
Fraunhofer IKTS ()

Fine-grained powders of excellent homogeneity represent a requirement for high performance materials based on silicon nitride and silicon carbide.Such powders can be produced by pyrolysis of organometallic precursors.The investigated silicon-carbonitride powders were prepared by gas phase-pyrolysis of disilazane or oligosilazanes under different pyrolysis conditions.On-line coupling of thermogravimetry (TG) with evolved gas analysis (EGA)/mass spectrometry (MS) was applied to characterize the behaviour of powders during annealing processes.The results show clearly the influence of pyrolysis conditions and post-treatment steps on the surface properties of powders.