Catalytic formation of one-dimensional nanocarbon and MgO whiskers in low carbon MgO–C refractories
Source abstract
Abstract
Abstract Low carbon MgO–C refractories added with a Ni-containing catalytic precursor and Al were prepared. MgO–NiO composite powder was firstly prepared by mixing magnesia powder in nickel nitrate ethanol solution and then incorporated into MgO–C refractories after pre-treating. The phase composition, microstructure and mechanical properties of MgO–C refractories treated at 1000 °C and 1400 °C were investigated by means of X-ray diffraction, scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and three-point bending test. The results showed that the addition of the Ni-containing catalytic precursor promoted the formation of one-dimensional nanocarbon at 1000 °C and the growth of MgO whiskers at 1400 °C, respectively. The in situ formation of MgO whiskers enhanced the mechanical properties of MgO–C refractories after coking at 1400 °C, which showed higher cold modulus of rupture and much larger displacement than MgO–C refractories without addition of the Ni-containing catalytic precursor.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Magnesium Oxide Properties and Applications · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. Dependence of mechanical properties of MgO–C bricks on graphite content10.2109/jcersj.102.23 ↗
2. Carbon based refractories
3. I. Bae, M. Kim, D. Chung, M. Shin, Y. Seo, The improvement of MgO–C bricks toughness for RH snorkels, in: Proceedings of the UNITECR׳05 Congress, 8–11 November, Orlando, USA, 2005.
4. Study on low carbon containing MgO–C refractory: use of nanocarbon10.1016/j.ceramint.2011.10.086 ↗
5. Current situation and development of low-carbon magnesia–carbon materials research
6. High-temperature properties of unburned MgO–C bricks containing Al and Si powders10.1111/j.1151-2916.1998.tb02713.x ↗
7. Influence of chemical reactions in Magnesia–graphite refractories: I, Effects on texture and high-temperature mechanical properties10.1111/j.1151-2916.1999.tb02276.x ↗
8. Influence of chemical reactions in Magnesia–graphite refractories: II, Effects of aluminum and graphite contents in generic products10.1111/j.1151-2916.1999.tb02277.x ↗
9. Microstructure evaluation of MgO–C refractories with TiO2− and Al-additions10.1016/j.jeurceramsoc.2006.03.001 ↗
10. Thermochemistry and microstructures of MgO–C refractories containing various antioxidants10.1016/S0955-2219(00)00308-3 ↗
11. Synthesis of hexagonal plate-like Al4SiC4 from calcined bauxite, silica and carbon black10.1016/j.powtec.2013.07.004 ↗
12. Synthesis of monophase Al4O4C and the effect of Al4O4C addition to MgO–C refractory10.1016/j.jallcom.2013.06.088 ↗
13. The influence of B4C and MgB2 additions on the behavior of MgO–C bricks10.1016/j.ceramint.2012.04.009 ↗
14. Progress on oxidation resistance of MgO–C refractories
15. Microstructure and mechanical properties of MgO–C refractories containing graphite oxide nanosheets (GONs)10.1016/j.ceramint.2012.09.080 ↗
16. Strengthening mechanism of graphene oxide nanosheets for Al2O3–C refractories10.1016/j.ceramint.2013.05.117 ↗
17. Microstructures and mechanical properties of Al2O3–C refractories with addition of multi-walled carbon nanotubes10.1016/j.msea.2012.04.001 ↗
18. Microstructures and mechanical properties of Al2O3–C refractories with addition of microcrystalline graphite10.1016/j.ceramint.2014.03.139 ↗
19. Effect of ceramic bonding phases on the thermo-mechanical properties of Al2O3–C refractories10.1016/j.ceramint.2013.01.024 ↗
20. Preparation of carbon-coated transition metal particles from mixtures of metal oxide and polyvinylchloride10.1016/S0008-6223(98)00200-0 ↗
21. Formation of graphite crystals at 1000–1200°C from mixtures of vinyl polymers with metal oxides10.1016/S0008-6223(00)00210-4 ↗
22. Dispersion of carbon nanotubes in hydroxyapatite powder by in situ chemical vapor deposition10.1016/j.mseb.2009.09.022 ↗
23. The synthesis of multi-walled carbon nanotubes (MWCNTs) by catalytic pyrolysis of the phenol-formaldehyde resins10.1016/j.physe.2006.10.013 ↗
24. H. Jansen, C.G. Aneziris, M. Hampel, Y.W. Li, Microstructure and mechanical behavior of magnesia–carbon bricks bonded by catalytically activated resins, in: Proceedings of the UNITECR׳07 Congress, 18–21 September, Dresden, Germany, 2007, pp. 38–42.
25. Effects of ferrocene on microstructure of MgO–C refractories matrix
26. In-situ formation of spinel fibers in MgO–C refractory matrixes10.1007/s11595-009-6896-1 ↗
27. In-situ catalytic growth of MgAl2O4 spinel whiskers in MgO–C refractories10.3139/146.111070 ↗
28. Microstructure and mechanical properties of MgO–C refractories containing expanded graphite10.1016/j.ceramint.2012.11.049 ↗
29. Effect of nanocarbon sources on microstructure and mechanical properties of MgO–C refractories10.1016/j.ceramint.2013.08.101 ↗
30. Formation of hollow MgO-rich spinel whiskers in low carbon MgO–C refractories with Al additives10.1016/j.jeurceramsoc.2014.07.028 ↗
31. Synthesis of nickel nanocapsules and carbon nanotubes via methane CVD10.1016/j.jallcom.2009.06.039 ↗
32. The growth of carbon nanotubes in aluminum powders by the catalytic pyrolysis of polyethylene glycol10.1016/j.carbon.2011.10.011 ↗
33. In situ formation of carbon nanotubes and ceramic whiskers in Al2O3–C refractories with addition of Ni-catalyzed phenolic resin10.1016/j.msea.2012.08.044 ↗
34. Catalytic reduction of magnesia by carbon
35. Effect of temperature on the properties and microstructures of carbon refractories for blast furnace10.1007/s11661-009-9850-0 ↗