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Synthesis of Rod-Like High-Purity -Sialon Powder by a Novel Carbothermal Reduction–Nitridation Method with a Nanocasting Procedure

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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

Affiliations: 1: Graduate School of the Chinese Academy of Sciences, Beijing 100049, China 2: 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

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