Rod-like high-purity -Sialon(Si6−zAlzOzN8−z, z=1,2,3) powders were synthesized from the mesoporous SiO2/C/Al2O3 composites, that were prepared using a nanocasting procedure, through a carbothermal reduction–nitridation method at 1420°C. The XRD analysis provided considerable evidence regarding the high purity of resultant -Sialon powders with various z-values. In SEM observation, it was also found that the particle morphology of the resultant product is nearly the same as that of the parent SBA-15 (SiO2 source). The resultant rod-like -Sialon powders may provide the ceramic composites with an ideal enhancement material.
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Document Type: Research Article
Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Publication date: 01 September 2010