| 摘要 |
A ceramic made by providing a composition and pyrolyzing the composition. The composition has siloxane polymer, metallic polymer, siloxane thermoset, and/or metallic thermoset having a backbone having: an acetylenic repeat unit; and -SiR<SUB>2</SUB>-(O-SiR<SUB>2</SUB>)<SUB>n</SUB>- and/or -SiR<SUB>2</SUB>-(O-SiR<SUB>2</SUB>)<SUB>n</SUB>-[Cb-SiR<SUB>2</SUB>-(O-SiR<SUB>2</SUB>)<SUB>n</SUB>]<SUB>m</SUB>. R is an organic group, Cb is a carborane, and n and m are integers greater than or equal to zero. Any crosslinking is a crosslink between acetylene groups and/or a polycarbosiloxane crosslink. The composition also has free metal atoms, metal clusters, or metal nanoparticles dispersed homogeneously throughout the composition; (ML<SUB>x</SUB>)<SUB>y</SUB>-acetylene complex in the backbone; and/or a metallic compound for forming a (ML<SUB>x</SUB>)<SUB>y</SUB>-acetylene complex. M is a metal, L is a ligand, x and y are positive integers.
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