Synthesis of Ceramic Fibers in the Si-O-C System
| Autor: | Katsumasa Yabe, Itsuma Sekiguchi, Katsuyoshi Shimokawa, Yoshikazu Suzuki, Yoshinobu Ueda |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Materials science
Silicon chemistry.chemical_element General Chemistry Condensed Matter Physics Carbide Amorphous solid Core (optical fiber) chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Fiber Ceramic Surface layer Composite material Hard-clad silica optical fiber |
| Zdroj: | Journal of the Ceramic Society of Japan. 99:757-762 |
| ISSN: | 1882-1022 0914-5400 |
| DOI: | 10.2109/jcersj.99.757 |
| Popis: | Ceramic fibers consisted of three elements, Si, O and C, were synthesized from carbide obtained from a natural organic material; rice husk. TEM was used to analyze the synthesized fibers. One fiber synthesized in N2 consisted of a two-layered structure of laminate covering a center core fiber. Another fiber synthesized in a mixture of N2 and H2 consisted of a three-layered structure of two laminates covering a core fiber. The fiber core was found to be crystallized and covered with an amorphous material, which contained concentrated oxygen. The core fiber did not dissolve in strong acid solutions and was very reactive with oxygen. From the results of X-ray diffraction and solubility in acid solution, it was found that the inside laminate from the surface layer to the core of the fiber formed a structure which was crystallized weakly into β-SiC, and Si-O-C. This study clearly shows that fiber synthesized from rice husk formed a continuous structure with varying concentration of oxygen and carbon-bound silicon; that is a new material with gradient structure. |
| Databáze: | OpenAIRE |
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