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Synthesis of Monolithic Potassium Geopolymer Ceramics Assisted by Molten Salt

Tao Ai, Feng-Hua Hong, Yi-Na Kang, Hao-Ran Zhang, Xin Yan

Materials (Basel). 2019 Feb 2;12(3):461.

PMID: 30717319

Abstract:

Potassium geopolymer (KGP) ceramics are synthesized by the molten salt method. Metakaolin changes to a potassium geopolymer through a reaction with potassium silicate at 80 °C/24 h. Potassium geopolymer, with a silicon to aluminum (Si/Al) molar ratio of 2, turns into a leucite ceramic in molten potassium salt (KCl) at 900 °C/6 h. X-Ray Diffraction analysis of the KGP treated by molten KCl salt shows the amorphous phase change to leucite crystal phase. A scanning electron microscope image of sintered KGP proves that the grain size of the leucite crystal decreases with soaking time. Compared with solid state sintering, liquid molten salt sintering KGP can be more easily formed into dense ceramics at lower temperatures.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
ALP21414415 Glucoraphani potassium salt Glucoraphani potassium salt 21414-41-5 (free acid) Price
LS7931549 2-hydroxyphenyltrifluoroborate potassium salt 2-hydroxyphenyltrifluoroborate potassium salt Price
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