Zhao, Lin ; Wang, Xueying ; Lee, Seahoon ; Ionescu, Emanuel ; Riedel, Ralf (2022)
Up-scalable preparation of nano zirconium carbide powder in liquid polymeric precursor and its pyrolysis mechanism.
In: Ceramics International, 48 (3)
doi: 10.1016/j.ceramint.2021.10.095
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Nano size ZrC powder was prepared by liquid polymeric precursor method. Zirconium n-butoxide (Zr(OnBu)4) and benzoylacetone (BA) were mixed directly with different molar ratios to synthesize transparent liquid zirconium carbide single-source precursors. The carbon content in the precursor could be changed by adding different amount of BA. X-ray pure ZrC was obtained when the molar ratio of BA/Zr(OnBu)4 was 4.6:1. The viscosity of the precursor was very low (<8 mPa s) without the addition of solvents. Zirconium carbide powders were fabricated by the pyrolysis at 800 C in argon and subsequent heating at various temperatures in vacuum for carbothermal reduction reaction. The pyrolysis behavior, phase composition and transformation, and microstructure of the as-fabricated ZrC powders were analyzed. The gases of CH4, CO and CO2 released due to decomposition and evaporation of the organic component and transformation from ZrO2 to ZrC during pyrolysis resulted in total 60-70% mass loss. The average grain size of the synthesized X-ray pure ZrC powders was less than 30 nm. Meanwhile, the pyrolysis mechanism of nano zirconium carbide powder was deduced.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Zhao, Lin ; Wang, Xueying ; Lee, Seahoon ; Ionescu, Emanuel ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Up-scalable preparation of nano zirconium carbide powder in liquid polymeric precursor and its pyrolysis mechanism |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Februar 2022 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Ceramics International |
| Jahrgang/Volume einer Zeitschrift: | 48 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1016/j.ceramint.2021.10.095 |
| Kurzbeschreibung (Abstract): | Nano size ZrC powder was prepared by liquid polymeric precursor method. Zirconium n-butoxide (Zr(OnBu)4) and benzoylacetone (BA) were mixed directly with different molar ratios to synthesize transparent liquid zirconium carbide single-source precursors. The carbon content in the precursor could be changed by adding different amount of BA. X-ray pure ZrC was obtained when the molar ratio of BA/Zr(OnBu)4 was 4.6:1. The viscosity of the precursor was very low (<8 mPa s) without the addition of solvents. Zirconium carbide powders were fabricated by the pyrolysis at 800 C in argon and subsequent heating at various temperatures in vacuum for carbothermal reduction reaction. The pyrolysis behavior, phase composition and transformation, and microstructure of the as-fabricated ZrC powders were analyzed. The gases of CH4, CO and CO2 released due to decomposition and evaporation of the organic component and transformation from ZrO2 to ZrC during pyrolysis resulted in total 60-70% mass loss. The average grain size of the synthesized X-ray pure ZrC powders was less than 30 nm. Meanwhile, the pyrolysis mechanism of nano zirconium carbide powder was deduced. |
| Freie Schlagworte: | Zirconium carbide, Precursor, Pyrolysis, Mechanism, ZRC, Temperature, Fabrication, Fibers, Microstructure, Polyzirconoxane, Composites |
| 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: | 12 Jan 2022 07:01 |
| Letzte Änderung: | 12 Jan 2022 07:01 |
| PPN: | |
| Projekte: | National Natural Science Foundation of China (NSFC), Grant No. 51962011, Natural Science Foundation of Jiangxi Province, Grant No. 20202BABL204014, Science and Technology Project of Jiangxi Provincial Education Department, Grant No. GJJ201312, State Key Laboratory of New Ceramic and Fine Processing, Grant No. KF201707 |
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