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© Jean-Claude MOSCHETTI / IRCER / CNRS Images



Synthèse de poudres non-oxydes par spray-pyrolyse d’un polymère précéramique

Preparation for the non-oxide powder synthesis process by spray-pyrolysis of a preceramic polymer. This polymer will first be turned into a mist, as shown in this image, then transported into the furnace by a carrier gas. Here, the polymer will undergo thermal decomposition, allowing the ceramics to be recombined and recovered in the form of powder (the organic matter is trapped in a cold bath of liquid nitrogen). This powder is made up of silicon, carbon and nitrogen. The resulting very fine powder (less than 100 nanometres) is highly reactive, which facilitates the sintering of ceramic parts.

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