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Abstract <p>The research is interested in producing metakaolin by heat treatment (calcination) of kaolin at different temperatures (550, 600, 650, and 700°C) for 30, 60, 120, and 180 min and calculating the degree of the dehydroxylation. The results show that the dehydroxylation level remains more stable at 700°C, 120 min. An X-ray diffraction (XRD) analysis is used to assay kaoline before and after heat treatment. Taguchi’s statistical method utilized the optimal conditions; the design summary is L16 (4<sup>2</sup>) with 16 runs and 2 factors. Metakaolin produced was used with ratios of 0, 1, 1.5, 3, 5, and 6%) to prepare epoxy-metakaolin composite. The mechanical properties of the composite material were studied. Scanning electron microscopy (SEM) is used to assay the fracture surface morphology of composite material. At 5% the highest value of impact strength and hardness were 4.63 kJ/m<sup>2,</sup> and 80.35 respectively.</p>

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Effect of Thermal Treatment of Kaolin on the Mechanical Properties of Epoxy–Kaolin Composite

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Raghad H. Hilal,
  • Rafah A. Nassif,
  • Wafaa K. Khalef,
  • Rana M. Salih,
  • Sadeq H. Lafta,
  • Nagham J. Shukur

摘要

Abstract

The research is interested in producing metakaolin by heat treatment (calcination) of kaolin at different temperatures (550, 600, 650, and 700°C) for 30, 60, 120, and 180 min and calculating the degree of the dehydroxylation. The results show that the dehydroxylation level remains more stable at 700°C, 120 min. An X-ray diffraction (XRD) analysis is used to assay kaoline before and after heat treatment. Taguchi’s statistical method utilized the optimal conditions; the design summary is L16 (42) with 16 runs and 2 factors. Metakaolin produced was used with ratios of 0, 1, 1.5, 3, 5, and 6%) to prepare epoxy-metakaolin composite. The mechanical properties of the composite material were studied. Scanning electron microscopy (SEM) is used to assay the fracture surface morphology of composite material. At 5% the highest value of impact strength and hardness were 4.63 kJ/m2, and 80.35 respectively.