中文摘要：

通过将聚硅氮烷和聚乙烯毗咯烷酮在一定条件下混合，经过分子聚合及惰性气体保护下高温热处理，在SiCN陶瓷基体表面生长短的多壁碳纳米管。所制备的碳纳米管长度短，在～500nnl范围，直径在～30am，并且具有完整的管状结构。多壁纳米炭管形成机理是聚乙烯吡咯烷酮在溶液中自组装形成的高分子管状结构，再经高温炭化而成。

英文摘要：

Short multiwall carbon nanotubes （MWCNTs） were synthesized by pyrolysis of a polysilazane-polyvinyl pyrrolidone mixture that was characterized by dynamic light scattering. It was found that the polymer mixture had a tube- shaped aggregate at the nanometer scale. The MWCNTs are - 30 nm in diameter and - 500 nm in length. Structural characterization revealed that they have a well-developed tubular structure with a uniform wall thickness, but are not well graphitized. The formation of the MWCNTs can be accounted for by the self-assembly of polyvinyl pyrrolidone in the so- lution to form polymeric nanotubes that were converted to MWCNTs by subsequent pyrolysis.