High-temperature performance in Al2O3–Cr2O3 refractories: Effect of Al2TiO5
Source abstract
Abstract
Abstract In an effort to reduce resource consumption through recycling, Al2O3–Cr2O3 refractories were prepared by sintering a mixture of brown corundum and recycled aluminum chromium slag at 1600 °C. To elucidate the significance of TiO2 in refractory, the effect of TiO2 addition on the room- and high-temperature mechanical properties of these refractories was investigated. The observed stepwise progression in the high-temperature mechanical properties of the specimens was explained by considering the results of thermodynamic simulations, as well as those of phase and microstructural analyses. This behavior was ascribed to the generation of Al2TiO5 in the matrix of the specimens. Moreover, the addition of TiO2 increased the content of undecomposed Al2TiO5, and it was accompanied by the appearance of several microcracks in the matrix portion. The high temperatures caused the integration of microcracks and counteracted the thermal stresses in the specimens, which considerably improved the high-temperature mechanical properties and the thermal shock resistance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Nuclear materials and radiation effects · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. Current problems and thinking on application and management of refractories for iron & steel industry
2. Classification of refractory properties and its application
3. Application of furnace refractories
4. Reaction mechanism in alumina/chrome (Al2O3–Cr2O3) solid solutions obtained by coprecipitation10.1111/j.1151-2916.2000.tb01508.x ↗
5. Thermal characteristics of Al2O3–MgO and Al2O3–spinel castables for steel ladles10.1016/S0272-8842(02)00047-0 ↗
6. Corrosion resistance and microstructure of high-alumina refractories, based on the rotary slag test10.1111/j.1151-2916.1990.tb05159.x ↗
7. Improvement of the corrosion resistance of alumina-chromia ceramic materials in molten slag10.1016/S0955-2219(03)00023-2 ↗
8. Oxides reactions with a high-chrome sesquioxide refractory
9. Failure mechanism in high chrome oxide gasifier refractories10.1007/s11661-011-0635-x ↗
10. Corrosion of glass contact refractories for the vitrification of radioactive wastes: a review10.1179/1743280410Y.0000000005 ↗
11. The significance of energy conservation and environmental protection for development of refractories
12. Formation process and properties of aluminium-chromium slag10.1016/j.ceramint.2018.05.247 ↗
13. Conditions for mutual conversion of Cr (Ⅲ) and Cr (Ⅵ) in aluminum chromium slag10.1016/j.jallcom.2019.02.093 ↗
14. Study on the application of aluminum-chromium slag composite brick in antimony reflection furnace
15. Effect of chromium concentrate fines addition on the performance of aluminum-chromium material for copper smelting furnace
16. Corrosion of magnesium aluminate spinel rich refractories by Sulphur-containing slag10.1016/j.jeurceramsoc.2014.11.031 ↗
17. Corrosion of glass contact refractories for the vitrification of radioactive wastes: a review10.1179/1743280410Y.0000000005 ↗
18. Crystal structure and properties of Al2O3-Cr2O3 solid solutions with different Cr2O3 contents10.1016/j.ceramint.2017.08.195 ↗
19. Reaction mechanism in alumina-chrome (Al2O3-Cr2O3) solid solutions obtained by coprecipitation10.1111/j.1151-2916.2000.tb01508.x ↗
20. Chemical corrosion mechanisms of magnesia-chromite and chrome-free refractory bricks by copper metal and anode slag10.1016/j.jeurceramsoc.2006.08.020 ↗
21. Degradation mechanisms and use of refractory linings in copper production processes: a critical review10.1016/j.jeurceramsoc.2013.10.005 ↗
22. Hexavalent chromium removal by ferrochromium slag10.1016/j.jhazmat.2005.06.017 ↗
23. Separation and characterisation of fused alumina obtained from aluminium chromium slag10.1016/j.ceramint.2017.11.073 ↗
24. Cheap metallic iron source for hexavalent chromium removal10.1016/j.egypro.2017.10.309 ↗
25. Copper smelting mechanism in oxygen bottom-blown furnace10.1016/S1003-6326(17)60110-9 ↗
26. Densification and hardness of Al2O3–Cr2O3 system with and without Ti addition10.1016/0272-8842(90)90044-G ↗
27. Sintering chromium oxide with the aid of TiO210.1111/j.1151-2916.1979.tb19056.x ↗
28. Analysis on chemical valence of chromium in residual MgO-Cr2O3 bricks for cement rotary kilns and RH furnaces
29. Densification behavior and properties of alumina chrome ceramics: effect of TiO210.1016/j.ceramint.2012.06.013 ↗
30. Thermo-mechanical behavior of Al2O3-Cr2O3 refractories: effect of TiO210.1016/j.ceramint.2014.10.155 ↗
31. Corrosion resistance comparison between the aluminum-chromium and magnesium-chromium bricks used in Ausmelt furnaces
32. Low I M. Diffraction, structure and phase stability studies on aluminium titanate10.1016/j.jeurceramsoc.2008.05.037 ↗
33. Study on external standard method for quantitative analysis of phase based on X-ray diffraction
34. Correlation between grain size and thermal expansion for aluminum titanate materials10.1111/j.1151-2916.1989.tb06091.x ↗
35. Thermal shock behaviour of high alumina aggregates derived from sillimanite beach sand with and without Fe2O3 doping10.1016/S0272-8842(99)00010-3 ↗
36. Mechanical properties of mullite materials10.1016/0955-2219(95)00133-6 ↗
37. Crack healing and bending strength of aluminium titanate ceramics at high temperature10.1111/j.1151-2916.1988.tb05064.x ↗