| 초록 |
The functional non-oxide ceramics derived from liquid ceramic precursors with transition metal compounds have been studied to use at chemically harsh conditions and high temperature. Recently, Ian Manners and his co-workers have shown many possibilities for magnetic materials with the monomer, ferrocenophane. We reported that mixing and pyrolysis of the liquid ceramic precursor, PMS(Polymethylsilane), and molybdenum chlorides were a easy and convenient way to fabricate the electrically conducting material, SiC containing MoSi2. For another magnetic properties of non-oxide ceramics, PMS and ferric chlorides were used and fabricated. The PMS was synthesized by the polymerization of dichloromethylsilane with sodium catalyst simply. After dissolving ferric chlorides in THF completely, the PMS was added to the solution. The molecular weight started increasing within a few hours, grew up to 15,000 Mw at room temperature, and colored in dark yellow. The high viscosity of mixed compound was obtained by evaporizing THF. Curing at 200℃ was followed, and the cured compound was pyrolyzed up to 1000℃ under nitrogen atmosphere. The obtained ceramic were analyzed by XRD, XPS and TGA. |
