Yang, Le ; Feng, Yao ; Riedel, Ralf ; Yu, Zhaoju (2022)
Enhanced high‐temperature resistance and magnetic property of SiFeC nanocomposites containing a small amount of boron.
In: International Journal of Applied Ceramic Technology, 19 (2)
doi: 10.1111/ijac.13897
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In this paper, the boron-modified polyferrocenylcarbosilanes (namely HBPFCS-Bs) with hyperbranched structure, as single-source-precursors, were successfully prepared by using 9-borabicyclo [3, 3, 1] nonane (9-BBN) and polyferrocenylcarbosilanes (HBPFCSs) as starting materials. The obtained HBPFCS-Bs were characterized using Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR) and gel permeation chromatography (GPC), providing that the boron element can be introduced into the HBPFCS chains by the hydroboration (B-H/C = C) reaction. Then, the structural evolution of HBPFCS-Bs and the boron-containing SiFeC ceramics at different temperatures (1100-1500 degrees C) was further investigated by thermogravimetric analysis, X-ray diffraction, energy dispersive spectroscopy, scanning electron microscope, and transmission electron microscopy. The results show that the incorporation of a small amount of boron (1 wt%) into precursors significantly improves the properties of the final ceramics, including the significant increase of the ceramic yield, enhanced high-temperature resistance, as well as the higher ceramic densification. Finally, the saturation magnetization of the HBPFCS-Bs-derived ceramics was also enhanced by the introduction of boron.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Yang, Le ; Feng, Yao ; Riedel, Ralf ; Yu, Zhaoju |
| Art des Eintrags: | Bibliographie |
| Titel: | Enhanced high‐temperature resistance and magnetic property of SiFeC nanocomposites containing a small amount of boron |
| Sprache: | Englisch |
| Publikationsjahr: | März 2022 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Applied Ceramic Technology |
| Jahrgang/Volume einer Zeitschrift: | 19 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1111/ijac.13897 |
| Kurzbeschreibung (Abstract): | In this paper, the boron-modified polyferrocenylcarbosilanes (namely HBPFCS-Bs) with hyperbranched structure, as single-source-precursors, were successfully prepared by using 9-borabicyclo [3, 3, 1] nonane (9-BBN) and polyferrocenylcarbosilanes (HBPFCSs) as starting materials. The obtained HBPFCS-Bs were characterized using Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR) and gel permeation chromatography (GPC), providing that the boron element can be introduced into the HBPFCS chains by the hydroboration (B-H/C = C) reaction. Then, the structural evolution of HBPFCS-Bs and the boron-containing SiFeC ceramics at different temperatures (1100-1500 degrees C) was further investigated by thermogravimetric analysis, X-ray diffraction, energy dispersive spectroscopy, scanning electron microscope, and transmission electron microscopy. The results show that the incorporation of a small amount of boron (1 wt%) into precursors significantly improves the properties of the final ceramics, including the significant increase of the ceramic yield, enhanced high-temperature resistance, as well as the higher ceramic densification. Finally, the saturation magnetization of the HBPFCS-Bs-derived ceramics was also enhanced by the introduction of boron. |
| Freie Schlagworte: | 9-borabicyclo [331] nonane, high temperature resistance, magnetic ceramics, single-source-precursor, vinyl ferrocene, SINGLE-SOURCE-PRECURSOR, CERAMIC NANOCOMPOSITES, SILICON-CARBIDE, LIQUID POLYCARBOSILANE, OXIDATION RESISTANCE, ZIRCONIUM DIBORIDE, CONVERSION, PYROLYSIS, POLY(FERROCENYLSILANES), STABILITY |
| Zusätzliche Informationen: | National Natural Science Foundation of China (NSFC), Grant Numbers 51872246,52061135102. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 08 Feb 2022 06:52 |
| Letzte Änderung: | 08 Feb 2022 06:54 |
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