In depth studies on cementitious nanocoatings on graphite for its contribution in corrosion resistance of alumina based refractory composite
Source abstract
Abstract
Abstract Some newer insights had been reported in this paper on synthesis and application of calcium aluminate coated graphite in alumina–carbon refractory castables. The course of evolution of AlO 4 (tetrahedral) and AlO 6 (octahedral) units in the nanocoating was investigated by XRD (X-ray diffraction), Raman spectroscopy and FTIR (Fourier transformed infrared spectroscopy) studies. An extended research on the resemblance and disparity between sol–gel and conventional refractory cements were also explored. FESEM ( Field Emission Scanning Electron Microscopy), XRD of coated and uncoated graphites had been revisited with a special study on ESEM (environmental scanning electron microscopy) of those two. The hydrophilic thin film containing Ca-doped γ-Al 2 O 3 phases rendered a decisive influence on graphite retention in castable matrix. A comparison between pore size distribution and thermogravimetric analysis (TGA) of two fired castable refractories advocated the superiority of the one containing coated graphite. Determination of corrosion and penetration indices by the static slag corrosion test, supplemented with microstructural studies, confirmed that the less porous castable containing coated graphites excelled again in the harsh environment.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
Show source-provided references
1. Banerjee · 1998 · 56
2. Refractories : Controlled microstructure composites for extreme environments10.1023/B:JMSC.0000045599.84988.9e ↗
3. A review of the possible applications of nanotechnology in refractory concrete10.3846/jcem.2010.66 ↗
4. Nanomaterials in refractory technology10.1007/s11148-010-9257-x ↗
5. Nanomaterials for applications in refractory materials
6. Recent developments in monolithic refractories
7. Easy-to-use mullite and spinel sols as bonding agents in a high-alumina based ultra low cement castable10.1016/S0272-8842(02)00034-2 ↗
8. Effect of preformed and in situ spinels on microstructure and properties of a low cement refractory castable10.1016/S0272-8842(03)00117-2 ↗
9. Nano-bonded refractory castables10.1016/j.ceramint.2012.11.028 ↗
10. Improved thermal shock performance of Al2O3-C refractories due to nanoscaled additives10.1016/j.ceramint.2011.08.011 ↗
11. S. Takanaga et al, Development of “MgO-rimmed MgO-C brick”, NanoTech, Refractories-3, Unified International Technical Conference on Refractories (UNITECR), Nov 8-11, Orlando, (USA), 2005.
12. Improving the water-wettability and oxidation resistance of graphite using Al2O3/SiO2 sol–gel coatings10.1016/S0955-2219(02)00284-4 ↗
13. Mechanical properties up to 1100oC of Al2O3–MgO-extruded graphite pellets castables reinforced with steel10.1016/j.ceramint.2007.11.005 ↗
14. Microstructure and rheological properties of titanium carbide-coated carbon black particles synthesized from molten salt10.1007/s10853-013-7424-4 ↗
15. Spinel-coated graphite for carbon containing refractory castables10.1111/j.1551-2916.2009.03133.x ↗
16. Improved sol-gel spinel (MgAl2O4) coatings on graphite for application in carbon containing high alumina castables10.1007/s10971-010-2275-9 ↗
17. Characteristics of refractory castables containing mullite and spinel coated graphites10.1080/10426914.2011.560501 ↗
18. Development of mullite and spinel coatings on graphite for improved water-wettability and oxidation resistance10.1016/j.ceramint.2010.03.035 ↗
19. Nanostructured cementitious sol gel coating on graphite for application in monolithic refractory composites10.1016/j.ceramint.2011.09.006 ↗
20. Comparison of solid state and sol-gel derived calcium aluminate coated graphite and characterization of prepared refractory composite10.1016/j.ceramint.2012.02.096 ↗
21. Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano-coatings on graphite10.1016/j.ceramint.2013.08.112 ↗
22. Nanoscale calcium aluminate coated graphite for improved performance of alumina based monolithic refractory composite10.1016/j.materresbull.2013.03.006 ↗
23. Physical characteristics of alumina-carbon refractory castables containing calcium aluminate-coated graphites
24. The corrosion and microstructure relationship for cement–bonded spinel refractory castables10.1016/j.ceramint.2011.10.061 ↗
25. Corrosion resistance of alumina-magnesia castable to slag in steel ladle lining10.2109/jcersj2.119.916 ↗
26. Influence of the properties of corundum aggregates on the strength and slag resistance of refractory castables
27. Reactions of fly ash with calcium aluminate cement and calcium sulphate10.1016/j.fuel.2009.02.018 ↗
28. Hydration of calcium aluminates and calcium sulfoaluminate studied by Raman spectroscopy10.1016/j.cemconres.2013.01.015 ↗
29. Raman spectroscopy of anhydrous and hydrated calcium aluminates and sulfoaluminates10.1111/jace.12535 ↗
30. Al coordination in sol-gel and conventional calcium aluminate glasses10.1016/S0022-3093(98)00376-7 ↗
31. Sol–gel processed Eu2+-doped alkaline earth aluminates,10.1016/S0925-8388(02)00068-3 ↗
32. Preparation of nanocrystalline calcium aluminate powders10.1023/A:1023013913102 ↗
33. On the polymorphism of CaAl2O4-structural investigations of two high pressure modifications10.1016/j.solidstatesciences.2005.12.010 ↗
34. Raman spectroscopy and heat capacity measurement of calcium ferrite type MgAl2O4 and CaAl2O4,10.1007/s00269-003-0332-4 ↗
35. Preparation and structural investigations of sol–gel derived Eu3+-doped CaAl2O410.1016/j.jpcs.2006.12.034 ↗
36. Raman Spectroscopy of calcium aluminate glasses and crystals10.1016/0022-3093(83)90672-5 ↗
37. Micro-Raman analysis of calcium aluminate fibers formed by inviscid melt spinning10.1016/S0167-577X(00)00093-8 ↗
38. Sol–gel synthesis of transparent alumina gel and pure gamma alumina by urea hydrolysis of aluminum nitrate10.1023/B:JSST.0000039497.46154.8f ↗
39. Calcium aluminate cements
40. P.C. Evangelista, C. Parr, C. Revais, Optimization of aluminate cements with 70% and 80% of aluminate based castables, Refractories Appl. News, August, 2000, pp. 3–9.
41. Preparation and characterization of reduced graphene nano sheets via pre-exfoliation of graphite flakes,10.5012/bkcs.2012.33.1.209 ↗
42. Intercalation and exfoliation routes to graphite nanoplatelets10.1039/b413029d ↗
43. Sonication assisted fabrication and post synthetic modifications of graphene-like materials10.1002/chem.200903259 ↗
44. Drying shrinkage of cement paste as measured in an environmental scanning electron microscope and comparison with microstructural model10.1023/A:1018682404655 ↗
45. (a) S. Sengupta, Sk. A. Ansar, S. Mukhopadhyay, Sol-gel derived binary oxide coatings on graphite for application in carbon containing castables, in: Proceedings of 9th India International Refractories Congress (IREFCON), 1-4 February, 2012, Kolkata, pp. 270–274.(b) D. Mali, S. Dutta, P.K. Maiti and S. Mukhopadhyay, Nanodimensional calcium aluminate coatings on graphite for carbon containing refractory castables, in: Proceedings of 10th India International Refractories Congress (IREFCON), 15-18 January 2014, Kolkata, pp. 56–62.
46. Arai · 1996 · 49
47. Hydration of γ-alumina in water and its effects on surface reactivity10.1021/la025651i ↗
48. Tailoring the characteristics of graphite oxides by different oxidation times10.1088/0022-3727/42/6/065418 ↗
49. Layer structured graphite oxide as a novel adsorbent for humic acid removal from aqueous solution10.1016/j.jcis.2009.02.005 ↗
50. Measurement methods of carbonation profiles in concrete: thermogravimetry, chemical analysis and gammadensitometry10.1016/j.cemconres.2007.04.015 ↗
51. Corrosion of refractories and ceramics
52. Evolution of in situ refractories in the 20th century10.1111/j.1151-2916.1998.tb02497.x ↗
53. A. Yamaguchi, Features and future development of the carbon containing refractory, Key Engg. Mats. (Adv. Ceramics and composites), 247, , Trans. Teach. Publication, Switzerland, 2003, pp. 239-24410.4028/www.scientific.net/KEM.247.239 ↗
54. Graphene oxide papers modified by divalent ions-enhancing mechanical properties via chemical cross-linking10.1021/nn700349a ↗