Influence of zirconia on the sintering behaviour and mechanical properties of reaction-sintered mullite-based composite ceramics

Liu, Zhenying; Xie, Nan; Huang, Shouwu; Zhang, Hanxin; Wu, Chongmei; Cui, Kai; Liu, Yin; Zhu, Heguo; Zhu, Jinbo; Xue, Changguo

doi:10.1180/clm.2022.25

Cited by 5 publications

(3 citation statements)

References 44 publications

(61 reference statements)

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“…The endothermic peaks at 55°C and 203°C correspond to the volatilization of the surface water and zeolitic water from the kaolin, whereas the endothermic peaks at 521°C and 810°C correspond to the dehydroxylation of the kaolin and the oxidation of iron oxide in air. Two exothermic peaks are present at 981°C and 1177°C, corresponding to the decomposition of metakaolin and the generation of secondary mullite, respectively, which were similarly reported in our previous study 28 . The conclusions of the thermal analyses mentioned above also further confirm that the mullite in Figures 1 and 2 originates from the mullitization of kaolin and the in‐situ synthesis of Al 2 O 3 grains with a SiO 2 ‐rich liquid phase.…”

Section: Resultssupporting

confidence: 87%

“…C, corresponding to the decomposition of metakaolin and the generation of secondary mullite, respectively, which were similarly reported in our previous study. 28 The conclusions of the thermal analyses mentioned above also further confirm that the mullite in Figures 1 and 2 originates from the mullitization of kaolin and the in-situ synthesis of Al 2 O 3 grains with a SiO 2 -rich liquid phase.…”

Section: Effect Of Tm 2 O 3 On Phase Compositionsupporting

confidence: 65%

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Effect of Tm₂O₃ on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines

Liu,

Xie,

Zhang

et al. 2023

Int J Applied Ceramic Tech

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Corundum‐mullite composite ceramics appropriate for application in solar heat transmission pipelines were fabricated by the addition of Tm2O3 and sintered at atmospheric pressure. The results demonstrated that with the introduction of Tm2O3 (1–7 wt.%), the physical and mechanical properties, corrosion resistance, and thermal shock resistance of the composite ceramics were significantly enhanced. The sintered sample AT5 (with 5 wt.% of Tm2O3 added) showed the best overall performance at 1550°C. The residual bending strength remained higher than 186 MPa after corrosion with 20 wt.% H2SO4 solution and 10 wt.% sodium hydroxide solution. The reaction of Tm2O3 with the Al2O3–SiO2 system produced the Tm2O3–Al2O3–SiO2 liquid phase. This liquid phase eliminated the pores through viscous flow, resulting in a dense microstructure. Furthermore, more mullite and dithulium disilicate were generated after thermal shock cycles, and their inhibition of crack deflection and extension allowed the composite ceramics to achieve excellent thermal shock resistance (residual bending strength as high as 199 MPa). The prepared corundum‐mullite composite ceramics have a good potential for application in solar heat transmission pipelines.

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Section: Resultssupporting

confidence: 87%

Section: Effect Of Tm 2 O 3 On Phase Compositionsupporting

confidence: 65%

Effect of Tm₂O₃ on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines

Liu,

Xie,

Zhang

et al. 2023

Int J Applied Ceramic Tech

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“…5 Multiphase compositing is one of the most common means of improving the thermal shock resistance in alumina ceramic materials. Z. Y. Liu 6 studied the influence of zirconia on the sintering behavior and mechanical properties of zirconia-corundum-mullite composites. Their research showed that the ZrO 2 phase transition promotes transgranular fracture, causing the ZrO 2 grains to be pinned at the grain boundaries, consequently enhancing the mechanical strength of the composites.…”

Section: Introductionmentioning

confidence: 99%

Thermal shock resistance and dimensional stability of zirconia‐corundum‐mullite composites for solar thermal storage

Zhou,

Wu,

et al. 2023

Int J Applied Ceramic Tech

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Zirconia‐corundum‐mullite composites were prepared from andalusite, ZrO2, and α‐Al2O3 and evaluated for application as solar thermal storage materials in this study. The effects of ZrO2 concentration (0–25 wt%) and sintering temperature(1500–1650°C) on the bending strength, phase composition, microstructure, dimensional stability, and thermal shock resistance of the samples were investigated. The results showed that sample C2 (containing 10 wt% ZrO2) sintered at 1600°C exhibited the best properties. A portion of Y2O3 existed in ZrO2, which excited a small amount of t‐ZrO2 in the sample after sintering, while the other portion of Y2O3 was separated from ZrO2 and participated in the formation of a high‐temperature liquid phase. The liquid phase reduced the dimensional stability of the sample. However, the liquid phase could also promote sintering, reducing the optimal sintering temperature, with lower sintering temperatures increasing the dimensional stability of the sample. Once again, the C2 sample exhibited the highest thermal shock resistance, with a strength loss of 2.76 MPa after 30 thermal shock tests. The thermal storage density(25–1100°C) of C2 was 1121 kJ/kg. In summary, sample C2 exhibits a high degree of dimensional stability and thermal shock resistance and can thus be used as a reliable solar thermal storage material.

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Preparation and properties of ZrO2-strengthened porous mullite insulation materials using Y2O3 additive

Yu,

Shi,

Liu

et al. 2024

J. Iron Steel Res. Int.

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Influence of zirconia on the sintering behaviour and mechanical properties of reaction-sintered mullite-based composite ceramics

Abstract: This is a 'preproof' accepted article for Clay Minerals. This version may be subject to change during the production process.

Cited by 5 publications

References 44 publications

Effect of Tm₂O₃ on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines

Effect of Tm₂O₃ on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines

Thermal shock resistance and dimensional stability of zirconia‐corundum‐mullite composites for solar thermal storage

Preparation and properties of ZrO2-strengthened porous mullite insulation materials using Y2O3 additive

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Influence of zirconia on the sintering behaviour and mechanical properties of reaction-sintered mullite-based composite ceramics

Abstract: This is a 'preproof' accepted article for Clay Minerals. This version may be subject to change during the production process.

Cited by 5 publications

References 44 publications

Effect of Tm2O3 on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines

Effect of Tm2O3 on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines

Thermal shock resistance and dimensional stability of zirconia‐corundum‐mullite composites for solar thermal storage

Preparation and properties of ZrO2-strengthened porous mullite insulation materials using Y2O3 additive

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Product

Resources

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Effect of Tm₂O₃ on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines

Effect of Tm₂O₃ on the properties of corundum‐mullite composite ceramics for solar heat transmission pipelines