1. Geopolymer-Based Nepheline Ceramics: Effect of Sintering Profile on Morphological Characteristics and Flexural Strength.
- Author
-
Ahmad, Romisuhani, Ibrahim, Wan Mastura Wan, Abdullah, Mohd Mustafa Al Bakri, Pakawanit, Phakkhananan, Vizureanu, Petrica, Abdullah, Arman Shah, Sandu, Andrei Victor, and Ahmad Zaidi, Fakhryna Hannanee
- Subjects
FLEXURAL strength ,LIQUID sodium ,SINTERING ,SURFACE texture ,SOLUBLE glass ,CERAMICS - Abstract
The focus of this study is the fabrication of innovative and sustainable ceramic-based geopolymer with improved low temperatures performances. Kaolin was mixed with liquid sodium silicate (Na
2 SiO3 ) and 12M of sodium hydroxide (NaOH) solution using alkali activator ratio of 0.24 and solid-to-liquid ratio of 1:1 to synthesize kaolin geopolymer. The effect of the sintering profile on the microstructure, pore evolution and flexural strength were investigated. The heating exposure aided consolidation and created a fairly uniform microstructure, resulting in a smooth surface texture. In comparison to the unheated geopolymer, 3D pore distribution showed a significant increase in the range size of ~30 µm with the appearance of isolated and intergranular pores. The flexural strength at 1200 °C with a heating rate of 5 °C/min and was increased by 146.4% to 85.4 MPa, as compared to the heating rate of 2 °C/min. The sintering process has an impact on the final microstructure formation thus improving the characteristic of geopolymer-based nepheline ceramic. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF