Effects of hydrothermal temperature on kaliophilite fillers and the fire resistance of geopolymers

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-09-13 DOI:10.1016/j.jmrt.2025.09.093

Haoxuan Zhang , Jinbang Wang , Tongsheng Zhang , Yulong Liu , Zonghui Zhou , Xiuzhi Zhang , Yongbo Huang , Xiaolei Lu , Peng Du

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引用次数: 0

Abstract

Geopolymers exhibit significant application prospect in fireproofing owing to their thermal stability. This paper adopted the kaliophilite filler prepared at different hydrothermal temperatures to further enhance the fire resistance of geopolymers, and the phase transformation behavior of kaliophilite-reinforced geopolymers were investigated by XRD, SEM, FT-IR, and TG-DTG. The results showed that the grain size and purity of kaliophilite filler could be regulated by the hydrothermal temperature. Moreover, lower hydrothermal temperature (140 °C) was not conducive to the formation of kaliophilite fillers, while higher hydrothermal temperature (≥150 °C) promoted its formation. Kaliophilite fillers synthesized at 180 °C exhibited the highest relative crystallinity, the highest thermal stability and the lowest mass loss. Furthermore, the kaliophilite-reinforced geopolymers possessed intact appearance, minimal mass loss and high residual compressive strength when exposed to high temperatures up to 1000 °C and 1200 °C, which indicated the kaliophilite fillers significantly improved the fire resistance of geopolymers.

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水热温度对嗜钾石填料及地聚合物耐火性的影响

地聚合物具有良好的热稳定性，在防火方面具有重要的应用前景。本文采用在不同水热温度下制备的嗜钾石填料进一步增强地聚合物的耐火性，并通过XRD、SEM、FT-IR、TG-DTG等手段研究了嗜钾石增强地聚合物的相变行为。结果表明，水热温度可调节嗜钾石填料的粒度和纯度。此外，较低的水热温度（140℃）不利于钾石填料的形成，而较高的水热温度（≥150℃）有利于其形成。在180℃下合成的嗜钾石填料具有最高的相对结晶度、最高的热稳定性和最低的质量损失。此外，在高达1000°C和1200°C的高温下，亲钾石增强的地聚合物具有完整的外观，最小的质量损失和高的残余抗压强度，这表明亲钾石填料显著提高了地聚合物的耐火性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.