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Improvement of the alkali corrosion resistance and mechanical properties of corundum castables by coating of Li2O-Al2O3-SiO2 glaze

  • Ruoyu Chen
  • Wenbao JiaEmail author
  • Xiaoyang Xu
  • Daqian Hei
  • Shujing Li
Research
  • 3 Downloads

Abstract

In terms of improving the alkali corrosion resistance of corundum castables, coating technology is applied to preparing the excellent properties of corundum castables with a glaze layer. The work focuses on the effect of the ratio of Al2O3/SiO2 on the properties of Li2O-Al2O3-SiO2 glazes. Furthermore, the influence of Li2O-Al2O3-SiO2 glazes on the alkali corrosion resistance of corundum castables is investigated. The results show that at a high temperature with increasing of the ratio of SiO2/Al2O3 in Li2O-Al2O3-SiO2 glazes, the viscosity and amount of liquid phase in the glaze increase gradually, which has a great influence on the quality of the glaze at a high temperature. And as the ratio of Al2O3/SiO2 in the glaze is between 6 and 8, the apparent porosity of corundum castables with the glaze layer decreases significantly resulting in preventing the permeation of alkali vapor into the castables, which can improve the alkali corrosion resistance and mechanical properties of corundum castables dramatically. Moreover, as the thermal expansion coefficient of the matrix is higher than the glaze layer, the compressive residual stress (tangential direction) will exist in the glaze layer, resulting in enhancing crack bifurcation, which is beneficial to improving the properties of corundum castables.

Keywords

Corundum castables Li2O-Al2O3-SiO2 glaze Alkali corrosion resistance Apparent porosity Mechanical properties 

Notes

References

  1. 1.
    Nemets, I.I., Strokova, V.V., Zubashchenko, R.V.: Kinetics of sintering of a low-cement corundum castable modified by an eutectoid phase. Refract. Ind. Ceram. 45(3), 214–216 (2004)CrossRefGoogle Scholar
  2. 2.
    Braulio, M.A.L., Rigaud, M., Buhr, A., Parr, C., Pandolfelli, V.C.: Spinel-containing alumina-based refractory castables. Ceram. Int. 37(6), 1705–1724 (2011)CrossRefGoogle Scholar
  3. 3.
    Singh, A.K., Sarkar, R.: Synthesis and characterization of alumina sol and its use as binder in no cement high-alumina refractory castables. Int. J. Appl. Ceram. Technol. 12(s3), E54–E60 (2016)Google Scholar
  4. 4.
    Tsakiridis, P.E., Papadimitriou, G.D., Tsivilis, S., Koroneos, C.: Utilization of steel slag for Portland cement clinker production. J. Hazard. Mater. 152(2), 805–811 (2008)CrossRefGoogle Scholar
  5. 5.
    Erdogdu, K., Turker, P.: Effects of fly ash particle size on strength of Portland cement fly ash mortar. Cem. Concr. Res. 28(9), 1217–1222 (1998)CrossRefGoogle Scholar
  6. 6.
    Stjernberg, J., Olivas-Ogaz, M.A., Antti, M.L., Ion, J.C., Lindblom, B.: Laboratory scale study of the degradation of mullite/corundum refractories by reaction with alkali-doped deposit materials. Ceram. Int. 39(1), 791–800 (2013)CrossRefGoogle Scholar
  7. 7.
    Qin, C.J., Wang, H.Z., Gu, H.Z.: Preparation of Li2O-MgO-Al2O3-SiO2 system high temperature low-expansion glaze and its properties. Rare Metal Mater. Eng. 36(s2), 659–661 (2007)Google Scholar
  8. 8.
    Zhang, X., Zhou, J., Wang, J., Jiang, Y.: Improvement of alkali corrosion resistance of mullite ceramics at high temperature by deposition Ca0.3Mg0.2Zr2(PO4)3 coating. J. Mater. Sci. 44(11), 2938–2944 (2009)CrossRefGoogle Scholar
  9. 9.
    Zhou, J.E., Zhang, X.Z., Peng, S.J.: Influence of Ca0.6Mg0.4Zr2(PO4)3 coating on alkali corrosion resistance of SiC ceramic. Adv. Mater. Res. (105-106), 386–389 (2010)Google Scholar
  10. 10.
    Li, M.H., Li, Y.B., Ouyang, D.G., Wang, X.D., Li, S.J., Chen, R.Y.: Effect of alumina bubble addition on the properties mullite castables. J. Alloys Compd. 735, 327–337 (2018)CrossRefGoogle Scholar
  11. 11.
    Chen, R.Y., Li, Y.B., Li, S.J., Xiang, R.F.: Effect of particle size of fly ash on the properties of lightweight insulation materials. Constr. Build. Mater. 123, 120–126 (2016)CrossRefGoogle Scholar
  12. 12.
    Vitucci, G., Mishuris, G.: Analysis of residual stresses in thermoelastic multilayer cylinders. J. Eur. Ceram. Soc. 36, 2411–2417 (2016)CrossRefGoogle Scholar
  13. 13.
    Duckworth, W.: Discussion of ryshkewitch paper by Winston duckworth. J. Am. Ceram. Soc. 36(2), 68–68 (1953)CrossRefGoogle Scholar

Copyright information

© Australian Ceramic Society 2019

Authors and Affiliations

  • Ruoyu Chen
    • 1
  • Wenbao Jia
    • 1
    Email author
  • Xiaoyang Xu
    • 2
  • Daqian Hei
    • 1
  • Shujing Li
    • 2
  1. 1.College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjingChina
  2. 2.The State Key Laboratory of Refractories and MetallurgyWuhan University of Science and Technology (WUST)WuhanChina

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