Thermal shock resistance properties of refractory castables bonded with a CaO-free binder

Optimization of Properties for Alumina-Spinel Refractory Castables by CMA (CaO-MgO-Al2O3) Aggregates

“…Thermal shock resistance (TSR) of refractory castables is closely associated with raw materials and microstructure [ 29 ]. It has been verified that the utility of high strength for thermal shock resistance was not a good practice [ 25 ].…”

Study on cobweb‐like carbon nanotubes/calcium aluminate cement and its effect on the properties of Al2O3–SiC–C castables

“…After the thermal shock, many deflections and branches were observed in CC castables (see Figure 15C,D), which increased the crack propagation path and surface area. The energy required for crack propagation was consumed in the matrix, which improved the toughness of the matrix, thus improving the thermal shock resistance of the castable macroscopically 35,36 . CNTs/CAC were used as a binder in CC samples, in which the CNTs with high specific strength were uniformly dispersed in the matrix, endowing the castables the toughening characteristic similar to composites.…”

“…The energy required for crack propagation was F I G U R E 1 5 Microstructures of castables crack after thermal shock of SC (A and B) and CC (C and D) samples consumed in the matrix, which improved the toughness of the matrix, thus improving the thermal shock resistance of the castable macroscopically. 35,36 CNTs/CAC were used as a binder in CC samples, in which the CNTs with high specific strength were uniformly dispersed in the matrix, endowing the castables the toughening characteristic similar to composites. Besides, the carbon residue of CC sample is higher than SC sample as it increases the thermal conductivity of castables, which also contributes to improving the thermal shock resistance of castables.…”

Particle grading effect on properties of reactive MgO‐bonded castables

“…Refractory castables encompass a broad range of materials that have undergone significant advancements, [1][2][3][4] leading to intricate and technically advanced formulations aimed at fulfilling highly demanding and rigorous industrial applications at elevated temperatures. [5][6][7][8][9][10] The primary features of castables consist of a well-chosen combination of raw materials, including aggregates, fillers, binders, and admixtures, [11][12][13][14][15][16][17][18] which leads to a deliberately designed particle gradation affecting the flowability and density of the mixture, [19][20][21][22][23][24][25] alongside the binder that influences both the green mechanical strength and the high-temperature properties, including phase evolutions. 6,[26][27][28] More recently, reactive MgO (RM) is considered as hydraulic binder to prepare castables with superior properties and performance.…”