Recent progress in synthesis of composite powders and their applications in low-carbon refractories

Luo, Jiyuan; Ren, Xiaoyan; Chong, Xiaochuan; Ding, Donghai; Ma, Beiyue; Xiao, Guoqing; Yu, Jingkun

doi:10.1007/s42243-022-00806-3

Cited by 44 publications

(8 citation statements)

References 90 publications

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“…The nano carbon composite powders can effectively enhance the poor oxidation resistance and dispersibility of nano carbon, because of the formation of an interlocking structure between nano carbon and other components 10 . Liang et al 11 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal shock resistance of low‐carbon Al₂O₃‐C refractories via CNTs/MgAl₂O₄ whiskers composite reinforcement

Feng,

Xiao,

Ding

et al. 2024

J Am Ceram Soc.

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The CNTs/MgAl2O4 whiskers composite reinforcement was prepared by catalytic carbon‐bed sintering and added to low‐carbon Al2O3‐C refractories to enhance the thermal shock resistance of refractories. The effects of Ni(NO3)2·6H2O content on the phase and microstructure of CNTs/MgAl2O4 were investigated. The nano‐indentation technology was used to quantitatively evaluate the effect of CNTs/MgAl2O4 on the thermal shock resistance of low‐carbon Al2O3‐C refractories, and the toughening mechanism of CNTs/MgAl2O4 on refractories was further investigated. The results revealed that the inner and outer diameters of the CNTs were approximately 5.69 and 16.26 nm, respectively. The CNTs winded around interlocking structural MgAl2O4 whiskers with a high aspect ratio (>100), which was beneficial to the dispersion of CNTs in the refractory matrix. The thermal shock resistance of low‐carbon Al2O3‐C refractories was significantly improved by adding 3.0 wt.% of CNTs/MgAl2O4 (named C3). The specific fracture energy of refractory matrix and residual strength ratio of C3 reached 141 N·m−1 and 39.2%, which were 29.4% and 97.0% higher than those of the blank sample (109 N·m−1 and 19.9%), respectively. This is because the refractory matrix was significantly reinforced by CNTs and MgAl2O4 whiskers, promoting the occurrence of “bridging” and “crack deflection” and the generation of microcracks in the refractory matrix.

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Section: Introductionmentioning

confidence: 99%

Enhanced thermal shock resistance of low‐carbon Al₂O₃‐C refractories via CNTs/MgAl₂O₄ whiskers composite reinforcement

Feng,

Xiao,

Ding

et al. 2024

J Am Ceram Soc.

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“…Recent researches showed that MgO-based refractories, especially MgO-SiC-C refractories, had potential to become substitute refractories due to their excellent slag corrosion resistance. The graphite had low wettability to the slag, [9][10][11][12] and silicon carbide could improve the slag corrosion resistance by enhancing oxidation resistance. 13,14 Some researchers had tried to apply such refractories in industry, and the results were encouraging.…”

Section: Introductionmentioning

confidence: 99%

Improved oxidation resistance while maintaining slag corrosion resistance of MgO–SiC–C refractories with moderate amounts of liquid phase

Guo,

Zhao,

Zhu

et al. 2024

Int J Applied Ceramic Tech

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MgO–SiC–C refractories with superior hot strength, oxidation resistance and slag resistance have potential to become substitute refractories for matte smelting furnace. In the present work, the influence of glass powder addition on phase compositions, hot strength, oxidation resistance, and slag resistance of MgO–SiC–C refractories was investigated. The liquid phase introduced by glass powder filled the pores, blocking the channel for the ingress of the oxygen and thus improving the oxidation resistance. Although the oxidation resistance of such refractories was improved with 1–3 wt% glass powder addition, their hot strength and slag corrosion resistance decreased when the glass powder content was 2–3 wt%. To balance the mechanical properties, oxidation resistance and slag resistance, low amount glass powder addition (1 wt%) was considered better choice.

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“…Pre‐synthesized composite powders containing low‐dimensional components as reinforcement can effectively overcome the above disadvantages. In addition, some studies show that multicomponent additives exhibit a better effect in refractories than single phases 35–38 . Lv et al 39 .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, some studies show that multicomponent additives exhibit a better effect in refractories than single phases. [35][36][37][38] Lv et al 39 prepared multilayer graphene/MgAl 2 O 4 composite powders by one-step sintering method and applied them in Al 2 O 3 -C refractories; the composite powders not only resulted in the formation of microcrack branches to consume thermal stress but also promote the generation of one-dimensional ceramic phase to play a role of bridge in the interface of different components in the refractory matrix. Li et al 40 synthesized CNTs/MgO composite powders by catalytic combustion synthesis and introduced them into low-carbon Al 2 O 3 -C refractories; the one-dimensional CNTS in the composite powders can strengthen and toughen the interface bonding of refractory matrix and thus improved the thermal shock resistance of refractories.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale toughening of low carbon Al₂O₃‐C refractories by means of SiC_nw/Al₂O₃ composite reinforcement

et al. 2023

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To improve the thermal shock resistance of low carbon Al2O3‐C refractories, SiC nanowires (SiCnw) containing SiCnw/Al2O3 composite reinforcement were introduced. The specific fracture energy of the Al2O3‐C refractory matrix was obtained by statistical grid nano‐indentation. The reinforcement mechanism of SiCnw/Al2O3 on thermal shock resistance of refractories was investigated. The results revealed that the matrix‐specific fracture energy of A6 (6 wt% SiCnw/Al2O3 added) was 217 N/m, which was 58.4% higher than reference sample A0 (137 N/m) and 18.6% higher than MA6 (183 N/m, 6 wt% SiC/Al2O3 added). A6 showed the highest residual strength ratio of 49.8%, which was 114.7 % higher than A0 (23.2%) and 82.4 % higher than MA6 (27.3%). The components with different morphology in SiCnw/Al2O3 cluster, especially SiC nanowires, promote the generation of microcracks, crack multi‐deflection, and branching, which toughen the matrix and improve the thermal shock resistance of refractories. In comparison to the literature, A6 showed a higher rising in residual strength ratio than those with higher graphite content (4 wt% and 20 wt%), which will greatly reduce the consumption of carbon‐containing refractories and contribute to the reduction of CO2 emission.

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Recent progress in synthesis of composite powders and their applications in low-carbon refractories

Cited by 44 publications

References 90 publications

Enhanced thermal shock resistance of low‐carbon Al₂O₃‐C refractories via CNTs/MgAl₂O₄ whiskers composite reinforcement

Enhanced thermal shock resistance of low‐carbon Al₂O₃‐C refractories via CNTs/MgAl₂O₄ whiskers composite reinforcement

Improved oxidation resistance while maintaining slag corrosion resistance of MgO–SiC–C refractories with moderate amounts of liquid phase

Nanoscale toughening of low carbon Al₂O₃‐C refractories by means of SiC_nw/Al₂O₃ composite reinforcement

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Recent progress in synthesis of composite powders and their applications in low-carbon refractories

Cited by 44 publications

References 90 publications

Enhanced thermal shock resistance of low‐carbon Al2O3‐C refractories via CNTs/MgAl2O4 whiskers composite reinforcement

Enhanced thermal shock resistance of low‐carbon Al2O3‐C refractories via CNTs/MgAl2O4 whiskers composite reinforcement

Improved oxidation resistance while maintaining slag corrosion resistance of MgO–SiC–C refractories with moderate amounts of liquid phase

Nanoscale toughening of low carbon Al2O3‐C refractories by means of SiCnw/Al2O3 composite reinforcement

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Enhanced thermal shock resistance of low‐carbon Al₂O₃‐C refractories via CNTs/MgAl₂O₄ whiskers composite reinforcement

Enhanced thermal shock resistance of low‐carbon Al₂O₃‐C refractories via CNTs/MgAl₂O₄ whiskers composite reinforcement

Nanoscale toughening of low carbon Al₂O₃‐C refractories by means of SiC_nw/Al₂O₃ composite reinforcement