Synthesis of Ultrahigh-Temperature Si–B–C–N Ceramic from Polymeric Waste Gas

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A “green” route to ultrahigh-temperature Si–B–C–N ceramic from vacuum-degassing waste gas of polyborosilazane {B[C2H4Si(CH3)NH]3}n (T2-1) has been developed. After gas-to-gel transformation, an amorphous ceramic Si5.3B1.0C19N3.7 was derived from the gel by dehydrocoupling and polymer-to-ceramic transformation. The ceramic started to form a nanostructure at 1700°C and resisted thermal degradation up to 2200°C in argon. This suggests that vacuum-degassing waste gases of polymer precursors may be perfect raw materials for various advanced ceramics.

Document Type: Research Article


Affiliations: 1: Department of Chemistry, Northeastern University, Shenyang 110004, China 2: Max-Planck-Institut für Metallforschung and Universität Stuttgart, Institut für Nichtmetallische Anorganische Materialien, Pulvermetallurgisches Laboratorium, D-70569 Stuttgart, Germany

Publication date: October 1, 2005

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