Publication: The effect of composition on the growth and morphology of zeolite A in solution
Issued Date
2004-06-01
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ISSN
08842914
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2-s2.0-3142736568
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Materials Research. Vol.19, No.6 (2004), 1613-1622
Suggested Citation
Bovornlak Oonkhanond, Michael E. Mullins The effect of composition on the growth and morphology of zeolite A in solution. Journal of Materials Research. Vol.19, No.6 (2004), 1613-1622. doi:10.1557/JMR.2004.0238 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/21319
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Title
The effect of composition on the growth and morphology of zeolite A in solution
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Abstract
The zeolite LTA (Linde type A) framework is composed of an equal amount of silica and alumina arranged in a three-dimension tetrahedral structure. This high alumina content zeolite possesses a strong negative surface charge in a basic solution due to the substitution of aluminum atoms into a SiO4tetrahedral structure making it difficult to form a continuous layer in solution. Synthesis parameters such as synthesis duration, chemical composition, and synthesis temperature were varied. The crystallization kinetics was carried out using the particle size measurement, percent crystallinity from x-ray diffraction analysis, infrared absorption of tetrahedra using attenuated total reflectance Fourier transform infrared spectroscopy, and the exponential growth model. The results showed that the zeolite A crystallization in a solution depends on the chemical kinetics of the zeolite formation, surface charge of the substrate, and the mass transfer in the solution. © 2004 Materials Research Society.