X-ray and MAS NMR characterization of the thermal transformation of Li(Na)/1bY zeolite to lithium aluminosilicates

The high temperature thermal transformation of Li-exchanged Na/1bY zeolite has been investigated by X-ray diffraction and 29Si MAS NMR studies. At 700°C, the zeolite was transformed into an amorphous phase and upon further heating to 800°C, formation of lithium aluminosilicate with high-quartz struc...

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Bibliographic Details
Published in:Materials research bulletin 1986, Vol.21 (12), p.1525-1532
Main Authors: Subramanian, M.A., Corbin, D.R., Farlee, R.D.
Format: Article
Language:English
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Summary:The high temperature thermal transformation of Li-exchanged Na/1bY zeolite has been investigated by X-ray diffraction and 29Si MAS NMR studies. At 700°C, the zeolite was transformed into an amorphous phase and upon further heating to 800°C, formation of lithium aluminosilicate with high-quartz structure, in addition to an amorphous phase, was noted. When heated above 900°C, the high-quartz structure was transformed into a β-spodumene related solid solution. X-ray and MAS NMR studies indicate the β-spodumene solid solution formed has the composition close to (Li o.23Na 0.06) A l 0.29Si 0.71O 2, which is in agreement with chemical analysis.
ISSN:0025-5408
1873-4227
DOI:10.1016/0025-5408(86)90094-2