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Effect of Magnesium Silicate Hydrate on Properties of Low-Microsilica Bonded Magnesia-Based Castables
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Yawei LI1, 2, Ning LIAO2, Wenjing LIU2, Sisi ZHANG2, Yibiao XU2, Shengnian TIE1, Xin LIU1, Yueying LI1
Journal of the Chinese Ceramic Society | 2023, 51(3) : 649 - 657
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Journal of the Chinese Ceramic Society | 2023, 51(3): 649-657
• Research Articles •
Effect of Magnesium Silicate Hydrate on Properties of Low-Microsilica Bonded Magnesia-Based Castables
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Yawei LI1, 2, Ning LIAO2, Wenjing LIU2, Sisi ZHANG2, Yibiao XU2, Shengnian TIE1, Xin LIU1, Yueying LI1
Affiliations
  • 1.Qinghai University, Key Laboratory of Advanced Materials and Applied Technology for Qinghai, Xining 810016, China
  • 2.Wuhan University of Science and Technology, National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan 430081, China

    • LI Yawei (1966-), male, Ph.D., Professor. E-mail:

About Author:

LI Yawei (1966-), male, Ph.D., Professor. E-mail:

Published: 2023-03-20 doi: 10.14062/j.issn.0454-5648.20220858
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Magnesium silicate hydrate (MgO-SiO2-H2O M-S-H) is a main bonding phase for microsilica bonded magnesium-castables used for tundish. Its content determines the mechanical properties after demolding. In this paper, M-S-H was synthesized with Na2SiO3·9H2O and MgCl2·6H2O as raw materials. The effect of M-S-H at different calcination parameters was investigated by X-ray diffraction, scanning electron microscopy, specific surface area measurement, nuclear magnetic resonance, and thermogravimetry-differential scanning calorimetry. Moreover, the synthesized M-S-H with microsilica powder (1%) was introduced into the magnesia-based castables to evaluate their influences on the properties. The results show that M-S-H has a memory effect when the calcination temperature is below 400 ℃. Increasing the calcination time can facilitate the insertion of interlayer hydroxyl groups in M-S-H gels and contribute to the formation of a lamellar structure with a higher structure stability. A certain amount of pre-synthesized M-S-H and a small amount of silica powder can assure the castable with a good workability and a sufficient early bonding strength. The reduced silica can suppress the formation of large sized defects due to the volume shrinkage of matrix, in the interface of aggregates and matrix, thus improving the mechanical properties of castables. This work provides a support for the development of magnesia-based castables with a low silica content.

magnesia-based castables  /  low-microsilica  /  magnesium silicate hydrate  /  "structural memory" properties  /  low-temperature calcination
李亚伟, 廖宁, 刘文静, 张思思, 徐义彪, 铁生年, 柳馨, 李月英. 基于水合硅酸镁结构记忆特性制备低硅镁质浇注料. 硅酸盐学报, 2023 , 51 (3) : 649 -657 . DOI: 10.14062/j.issn.0454-5648.20220858
Yawei LI, Ning LIAO, Wenjing LIU, Sisi ZHANG, Yibiao XU, Shengnian TIE, Xin LIU, Yueying LI. Effect of Magnesium Silicate Hydrate on Properties of Low-Microsilica Bonded Magnesia-Based Castables[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (3) : 649 -657 . DOI: 10.14062/j.issn.0454-5648.20220858
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Year 2023 volume 51 Issue 3
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Article Info
doi: 10.14062/j.issn.0454-5648.20220858
  • Receive Date：2022-10-11
  • Online Date：2026-10-20
  • Published：2023-03-20
Article Data
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History
  • Received：2022-10-11
  • Revised：2022-11-30
Funding
Affiliations
    1.Qinghai University, Key Laboratory of Advanced Materials and Applied Technology for Qinghai, Xining 810016, China
    2.Wuhan University of Science and Technology, National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan 430081, China

Corresponding:

LIAO Ning (1988-), Male, Ph.D. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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