Effect of particle size of hydromagnesite on properties of calcium aluminate cement bonded corundum based castables

Calcium aluminate cement was premixed with hydromagnesite having different particle sizes, as a calcium magnesium aluminate cement precursor, to investigate the influence of particle size of hydromagnesite on the volume stability and thermo-mechanical properties of corundum based castables after fir...

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Bibliographic Details
Published in:Ceramics international 2020-12, Vol.46 (17), p.27119-27125
Main Authors: Li, Ye, Guo, Liu, Ding, Dafei, Chen, Liugang
Format: Article
Language:English
Subjects:
Calcium aluminate cement
Castables
Hydromagnesite
Refractory
Thermo-mechanical properties
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Summary:Calcium aluminate cement was premixed with hydromagnesite having different particle sizes, as a calcium magnesium aluminate cement precursor, to investigate the influence of particle size of hydromagnesite on the volume stability and thermo-mechanical properties of corundum based castables after firing at 1550 °C. The impact of particle size of hydromagnesite on the phase composition and microstructure evolution of fired castables matrix were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The results demonstrate that hydromagnesite with smaller particle size has a better volumetric stability and thermo-mechanical properties of castables, because of the more homogeneously distributed micro-pores, and smaller size MA and CA6 resulted from the more uniformly distributed hydromagnesite in castables.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2020.07.189