Fabrication and thermal shock behavior of periclase-forsterite aggregates with micro-nanometer dual-pore-size structures

Qi, Xin; Qi, Dongtao; Luo, Xudong; Wang, Shaoyang; Zhang, Ling; Zhao, Jialiang; You, Jichun; Liu, Yan; Zhou, Yuanpeng; Pan, Zhenzhong

doi:10.1016/j.ceramint.2022.09.144

Cited by 5 publications

(2 citation statements)

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“…Once subjected to mechanical or thermal stresses, crack expansion was inhibited. In addition, the incorporation of hollow spheres as a second phase located at the grain boundaries could lead to microcrack deflection and the absorption of more fracture energy, further improving the thermal shock resistance and other high‐temperature strength of the samples 41,42 …”

Section: Resultsmentioning

confidence: 99%

“…In addition, the incorporation of hollow spheres as a second phase located at the grain boundaries could lead to microcrack deflection and the absorption of more fracture energy, further improving the thermal shock resistance and other high-temperature strength of the samples. 41,42 TA B L E 4 The main chemical compositions of cement clinker (wt.%).…”

Section: High-temperature Properties Of the Samplesmentioning

confidence: 99%

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Effect of hollow spheres on the properties of lightweight periclase‐magnesium aluminate spinel refractories

Liu

Zhang

Wang

et al. 2023

Int J Applied Ceramic Tech

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This study presents new lightweight periclase-magnesium alumina spinel refractories for the working lining of cement rotary kilns in which magnesium alumina spinel hollow spheres are used to replace conventional dense fused magnesiaaluminate spinel aggregates. The effects of adding spinel hollow spheres on the physical properties, mechanical strength, thermal conductivity, and slag resistance of the samples were explored. The results showed that compared with the sample prepared with dense aggregates, the sample prepared with hollow spheres had a 10.3% higher cold compressive strength, 44.1% higher modulus of rupture (MOR), and lower bulk density. Additionally, with increasing hollow spheres content, the thermal conductivity decreased from 3.79 W/(m⋅K) to 2.53 W/(m⋅K), and the high-temperature MOR increased from 2.82 to 4.09 MPa. The highest residual strength ratio was 90.73% (15 wt.% hollow spheres), which is 1.17 times that of the sample prepared without hollow spheres. Moreover, microstructure and energy dispersive spectroscopy of crucible specimens after corrosion by cement clinker showed that specimens with 15 wt.% hollow sphere additions had a better slag resistance. Introducing hollow spheres reduced the thermal conductivity of the refractories, providing a new strategy for improving the heat insulation performance of kiln linings.

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Section: Resultsmentioning

confidence: 99%

Section: High-temperature Properties Of the Samplesmentioning

confidence: 99%