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Changes in the medium-range order of zeolite A by mechanical and thermal amorphization.
MICROPOR MESOPOR MAT
92 - 96.
Crystalline zeolite A was amorphized by mechanical and thermal treatments, and the resulting changes in the atomic arrangement are characterized by HEXRD, Al-27 MAS NMR and Raman spectroscopy. HEXRD measurements revealed that the 6R and 8R rings are distorted and/or destroyed, while the 4R ring is preserved during mechanical treatment, but all rings are distorted and/or destroyed by thermal treatment. Data from Al-27 MAS NMR and Raman spectroscopy also support these results. Furthermore, recrystallization behavior is found to be different between mechanically and thermally amorphized solids. (C) 2010 Elsevier Inc. All rights reserved.
|Title:||Changes in the medium-range order of zeolite A by mechanical and thermal amorphization|
|Keywords:||Ring, Amorphization, Medium-range order, Zeolite A, X-RAY-DIFFRACTION, HYDROTHERMAL SYNTHESIS, RAMAN-SPECTROSCOPY, ALUMINOSILICATE ZEOLITES, NEUTRON-DIFFRACTION, HIGH-PRESSURE, SILICA, ELUCIDATION, PRECURSORS, GLASS|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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