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Ceramic materials generated by combining compacting and sintering have become more essential in the current industry according to the superior mechanical and physical properties. This research aims to understand the effects of different sintering temperatures on kaolin geopolymer based ceramics and explore their microstructure and strength evolution under varying sintering temperature (100 °C, 300 °C, 500 °C, 700 °C, 900 °C and 1100 °C). XRF analysis underscores the dominance of silicon oxide (SiO2) and aluminum oxide (Al2O3) in the geopolymer structure while XRD patterns reveal a dynamic shift in crystalline phases, with nepheline emerging dominantly at higher temperatures. SEM analysis vividly illustrates structural changes, emphasizing increased density and reduced porosity as temperatures rise. Flexural strength peaks at 1100 °C, aligning with heightened density, indicating optimal sintering temperature. This research finding addresses the gap in knowledge concerning the transformation from amorphous to crystalline phases, such as mullite and nepheline, with the overarching goal of unlocking the potential for improved ceramic performance in various industrial applications, including construction materials, refractories, and advanced ceramics.

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Microstructural and Strength Evolutions of Kaolin Geopolymer Based Ceramics at Different Sintering Temperature

  • 会议论文

  • 发表日期：

    2025年

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  • Nur Bahijah Mustapa,
  • Romisuhani Ahmad,
  • Mohd Mustafa Al Bakri Abdullah,
  • Andrei Victor Sandu,
  • Selva Vinayakkan A/L Sures

摘要

Ceramic materials generated by combining compacting and sintering have become more essential in the current industry according to the superior mechanical and physical properties. This research aims to understand the effects of different sintering temperatures on kaolin geopolymer based ceramics and explore their microstructure and strength evolution under varying sintering temperature (100 °C, 300 °C, 500 °C, 700 °C, 900 °C and 1100 °C). XRF analysis underscores the dominance of silicon oxide (SiO2) and aluminum oxide (Al2O3) in the geopolymer structure while XRD patterns reveal a dynamic shift in crystalline phases, with nepheline emerging dominantly at higher temperatures. SEM analysis vividly illustrates structural changes, emphasizing increased density and reduced porosity as temperatures rise. Flexural strength peaks at 1100 °C, aligning with heightened density, indicating optimal sintering temperature. This research finding addresses the gap in knowledge concerning the transformation from amorphous to crystalline phases, such as mullite and nepheline, with the overarching goal of unlocking the potential for improved ceramic performance in various industrial applications, including construction materials, refractories, and advanced ceramics.