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1996
Conference Paper
Titel
Investigations on surface reactivity of silicon-carbonitride powders by thermoanalytical methods
Abstract
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.