Effect of the water-soluble calcium chloride on volumetric stability and thermal shock resistance of alumina-based castables.
- Resource Type
- Article
- Authors
- Zhu, Lingling; Zhang, Xing; Liu, Luoqiang; Gao, Zexu; Zhang, Liang; Zhang, Peixiong; Ye, Guotian; Li, Hongxia; Liu, Guoqi
- Source
- Ceramics International. Jun2020:Part A, Vol. 46 Issue 8, p10647-10651. 5p.
- Subject
- *THERMAL shock
*CALCIUM chloride
*THERMAL resistance
*THERMAL stability
*ADDITIVES
*ALUMINUM oxide
*CALCINATION (Heat treatment)
*ALUMINA composites
- Language
- ISSN
- 0272-8842
As water-soluble calcium chloride (CaCl 2) could be uniformly distributed in the castable compared with commercial CAC particles (25–55 μm), the effect of CaCl 2 addition (0–2 wt%) on the distribution of CA 6 and the properties of the alumina-based castables (especially thermal shock resistance and permanent linear change) after calcination at 1450 °C were investigated. It was found that the alumina-based castable with 1.5 wt% CaCl 2 had the minimum PLC value of 0.18% and the maximum value of residual CMOR ratio (25%). The castable matrix fired at 800–1450 °C was examined by XRD to identify the phase evolution of castable with the addition of CaCl 2. The 1450 °C fired castable matrix without and with 1.5 wt% CaCl 2 additive was analyzed by SEM to determine the morphology evolution of CA 6. The improved volume stability and enhanced thermal-shock resistance of the alumina-based castables containing CaCl 2 additive has been illustrated through the formation of CA 6 with smaller size and more uniform distribution. [ABSTRACT FROM AUTHOR]